Relevant bibliographies by topics / TRPL

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'TRPL'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "TRPL"

1

Revuelta, J. L., and M. Jayaram. "Phycomyces blakesleeanus TRP1 gene: organization and functional complementation in Escherichia coli and Saccharomyces cerevisiae." Molecular and Cellular Biology 7, no. 8 (August 1987): 2664–70. http://dx.doi.org/10.1128/mcb.7.8.2664-2670.1987.

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We have cloned the gene encoding the TRPF and TRPC functions of Phycomyces blakesleeanus by complementation of the corresponding activities of Escherichia coli. TRPF also complemented a trpl mutation in Saccharomyces cerevisiae. As in other filamentous fungi, such as Neurospora and Aspergillus spp., the P. blakesleeanus TRPF and TRPC formed part of a trifunctional polypeptide encoded by a single gene (called TRP1). Transcription of TRP1 in P. blakesleeanus did not appear to be regulated by light or by the nutritional status of the culture. The information on the structure and organization of a P. blakesleeanus gene derived from these studies should be useful in devising molecular genetic strategies to analyze the sensory physiology of this organism.
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Revuelta, J. L., and M. Jayaram. "Phycomyces blakesleeanus TRP1 gene: organization and functional complementation in Escherichia coli and Saccharomyces cerevisiae." Molecular and Cellular Biology 7, no. 8 (August 1987): 2664–70. http://dx.doi.org/10.1128/mcb.7.8.2664.

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We have cloned the gene encoding the TRPF and TRPC functions of Phycomyces blakesleeanus by complementation of the corresponding activities of Escherichia coli. TRPF also complemented a trpl mutation in Saccharomyces cerevisiae. As in other filamentous fungi, such as Neurospora and Aspergillus spp., the P. blakesleeanus TRPF and TRPC formed part of a trifunctional polypeptide encoded by a single gene (called TRP1). Transcription of TRP1 in P. blakesleeanus did not appear to be regulated by light or by the nutritional status of the culture. The information on the structure and organization of a P. blakesleeanus gene derived from these studies should be useful in devising molecular genetic strategies to analyze the sensory physiology of this organism.
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Parnas, Moshe, Ben Katz, and Baruch Minke. "Open Channel Block by Ca2+ Underlies the Voltage Dependence of Drosophila TRPL Channel." Journal of General Physiology 129, no. 1 (December 26, 2006): 17–28. http://dx.doi.org/10.1085/jgp.200609659.

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The light-activated channels of Drosophila photoreceptors transient receptor potential (TRP) and TRP-like (TRPL) show voltage-dependent conductance during illumination. Recent studies implied that mammalian members of the TRP family, which belong to the TRPV and TRPM subfamilies, are intrinsically voltage-gated channels. However, it is unclear whether the Drosophila TRPs, which belong to the TRPC subfamily, share the same voltage-dependent gating mechanism. Exploring the voltage dependence of Drosophila TRPL expressed in S2 cells, we found that the voltage dependence of this channel is not an intrinsic property since it became linear upon removal of divalent cations. We further found that Ca2+ blocked TRPL in a voltage-dependent manner by an open channel block mechanism, which determines the frequency of channel openings and constitutes the sole parameter that underlies its voltage dependence. Whole cell recordings from a Drosophila mutant expressing only TRPL indicated that Ca2+ block also accounts for the voltage dependence of the native TRPL channels. The open channel block by Ca2+ that we characterized is a useful mechanism to improve the signal to noise ratio of the response to intense light when virtually all the large conductance TRPL channels are blocked and only the low conductance TRP channels with lower Ca2+ affinity are active.
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Melior, Hendrik, Siqi Li, Ramakanth Madhugiri, Maximilian Stötzel, Saina Azarderakhsh, Susanne Barth-Weber, Kathrin Baumgardt, John Ziebuhr, and Elena Evguenieva-Hackenberg. "Transcription attenuation-derived small RNA rnTrpL regulates tryptophan biosynthesis gene expression in trans." Nucleic Acids Research 47, no. 12 (April 17, 2019): 6396–410. http://dx.doi.org/10.1093/nar/gkz274.

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Abstract Ribosome-mediated transcription attenuation is a basic posttranscriptional regulation mechanism in bacteria. Liberated attenuator RNAs arising in this process are generally considered nonfunctional. In Sinorhizobium meliloti, the tryptophan (Trp) biosynthesis genes are organized into three operons, trpE(G), ppiD-trpDC-moaC-moeA, and trpFBA-accD-folC, of which only the first one, trpE(G), contains a short ORF (trpL) in the 5′-UTR and is regulated by transcription attenuation. Under conditions of Trp sufficiency, transcription is terminated between trpL and trpE(G), and a small attenuator RNA, rnTrpL, is produced. Here, we show that rnTrpL base-pairs with trpD and destabilizes the polycistronic trpDC mRNA, indicating rnTrpL-mediated downregulation of the trpDC operon in trans. Although all three trp operons are regulated in response to Trp availability, only in the two operons trpE(G) and trpDC the Trp-mediated regulation is controlled by rnTrpL. Together, our data show that the trp attenuator coordinates trpE(G) and trpDC expression posttranscriptionally by two fundamentally different mechanisms: ribosome-mediated transcription attenuation in cis and base-pairing in trans. Also, we present evidence that rnTrpL-mediated regulation of trpDC genes expression in trans is conserved in Agrobacterium and Bradyrhizobium, suggesting that the small attenuator RNAs may have additional conserved functions in the control of bacterial gene expression.
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Vassort, Guy, and Julio Alvarez. "Transient receptor potential: a large family of new channels of which several are involved in cardiac arrhythmiaThis article is one of a selection of papers from the NATO Advanced Research Workshop on Translational Knowledge for Heart Health (published in part 1 of a 2-part Special Issue)." Canadian Journal of Physiology and Pharmacology 87, no. 2 (February 2009): 100–107. http://dx.doi.org/10.1139/y08-112.

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The transient receptor potential (TRP) family of ion channels comprises more than 50 cation-permeable channels expressed throughout the animal kingdom. TRPs can be grouped into 7 main subfamilies according to structural homology: the TRPC (canonical), TRPV (vanilloid), TRPM (melastatin), TRPP (polycystin), TRPML (mucolipin), TRPA (ankyrin), and TRPN (NO mechanopotential). During the past 20 years, the cloning and characterization after reexpression of most members of these cation channels have led to a plethora of data and more recently to some understanding of their roles in various cells and tissues. Specifically in the heart, TRPs are known to be involved in various diseases, including hypertrophy, heart failure, and arrhythmia. The later part of this review focuses on the potential contribution of TRPs to cardiac rhythm and their potential proarrhythmic effects. Furthermore, several neurotransmitters that activate the formation of diacylglycerol could modulate cardiac rhythm or, like ATP, induce arrhythmia.
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Paradkar, Ashish S., Leo C. Vining, and Colin Stuttard. "Characterization of tryptophan-requiring auxotrophs of Streptomyces venezuelae ISP5230." Canadian Journal of Microbiology 37, no. 5 (May 1, 1991): 333–38. http://dx.doi.org/10.1139/m91-054.

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The growth supplement requirements in minimal medium, the identity of metabolic intermediates accumulated, and the activity of tryptophan biosynfhetic enzymes detectable in cell extracts allowed the trp mutations in 10 auxotrophic strains of Streptomyces venezuelae ISP5230 to be determined. Three strains contained lesions in the trpA and two in the trpB subunits of tryptophan synthetase; two other strains were either double (trpA, trpB) mutants or contained a polar mutation in one of the subunit genes. Two strains with trpC mutations and one with a trpD mutation were also identified. When considered with information about the relative location of the auxotrophic markers obtained in this and earlier studies, the results indicated that trpA, trpB, and trpC are clustered near hisA and hisB, while trpD is in a separate position near nicB. The arrangement resembles that of the comparable genes in Streptomyces coelicolor A3(2). Key words: tryptophan auxotrophs, Streptomyces venezuelae, mutation loci, tryptophan biosynthesis genes.
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Sharma, Deep, Rekha Rana, and Kiran Thakur. "A REVIEW ON ROLE OF TRPV CATION CHANNELS." Journal of Biomedical and Pharmaceutical Research 10, no. 2 (March 30, 2021): 32–51. http://dx.doi.org/10.32553/jbpr.v10i2.857.

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The mammalian branch of the Transient Receptor Potential (TRP) superfamily of cation channels consists of 28 members. They can be subdivided in six main subfamilies: the TRPC (‘Canonical’), TRPV (‘Vanilloid’), TRPM (‘Melastatin’), TRPP (‘Polycystin’), TRPML (‘Mucolipin’) and the TRPA (‘Ankyrin’) group. The TRPV subfamily comprises channels that are critically involved in nociception and thermo-sensing (TRPV1, TRPV2, TRPV3, TRPV4) as well as highly Ca2+ selective channels involved in Ca2+ absorption/ reabsorption in mammals (TRPV5, TRPV6). In this review we summarize fundamental physiological properties of all TRPV members in the light of various cellular functions of these channels and their significance in the various diseases.
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Walker, Rebecca L., Joseph R. Hume, and Burton Horowitz. "Differential expression and alternative splicing of TRP channel genes in smooth muscles." American Journal of Physiology-Cell Physiology 280, no. 5 (May 1, 2001): C1184—C1192. http://dx.doi.org/10.1152/ajpcell.2001.280.5.c1184.

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Nonselective cation channels (NSCC) are targets of excitatory agonists in smooth muscle, representing the nonselective cation current I cat. Na+ influx through NSCC causes depolarizations and activates voltage-dependent Ca2+ channels, resulting in contraction. The molecular identity of I cat in smooth muscle has not been elucidated; however, products of the transient receptor potential (TRP) genes have characteristics similar to native I cat. We have determined the levels of TRP transcriptional expression in several murine and canine gastrointestinal and vascular smooth muscles and have analyzed the alternative processing of these transcripts. Of the seven TRP gene family members, transcripts for TRP4, TRP6, and TRP7 were detected in all murine and canine smooth muscle cell preparations. TRP3 was detected only in canine renal artery smooth muscle cells. The full-length cDNAs for TRP4, TRP6, and TRP7, as well as one splice variant of TRP4 and two splice variants of TRP7, were cloned from murine colonic smooth muscle. Quantitative RT-PCR determined the relative amounts of TRP4, TRP6, and TRP7 transcripts, as well as that of the splice variants, in several murine smooth muscles. TRP4 is the most highly expressed, while TRP6 and TRP7 are expressed at a lower level in the same tissues. Splice variants for TRP7, deleted for exons encoding amino acids including transmembrane segment S1, predominated in murine smooth muscles, while the full-length form of the transcript was expressed in canine smooth muscles.
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LAN, Ling, Helen BRERETON, and J. Greg BARRITT. "The role of calmodulin-binding sites in the regulation of the Drosophila TRPL cation channel expressed in Xenopus laevis oocytes by Ca2+, inositol 1,4,5-trisphosphate and GTP-binding proteins." Biochemical Journal 330, no. 3 (March 15, 1998): 1149–58. http://dx.doi.org/10.1042/bj3301149.

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The roles of calmodulin-binding sites in the regulation by Ca2+, inositol 1,4,5-trisphosphate (InsP3) and GTP-binding regulatory proteins (G-proteins) of the Drosophila melanogaster TRPL (transient-receptor-potential-like) non-specific Ca2+ channel were investigated. Wild-type TRPL protein and two mutant forms, TRPL (W713G) and TRPL (W814G), in which a key tryptophan residue in each of the two putative calmodulin-binding sites (Sites 1 and 2, respectively) was replaced by glycine, were expressed heterologously in Xenopuslaevis oocytes. Immunofluorescence studies indicated that the expressed TRPL, TRPL (W713G) and TRPL (W814G) proteins are located at the plasma membrane. TRPL oocytes (oocytes injected with trpl cRNA) and TRPL (W814G) oocytes [oocytes injected with trpl (W814G) cRNA] exhibited substantially greater rates of basal (constitutive) Ca2+ inflow (measured using fluo-3 and the Ca2+ add-back protocol) than mock-injected oocytes (mock oocytes). In TRPL (W713G) oocytes, this difference was abolished. In TRPL and TRPL (W814G) [oocytes injected with trpl (W713G) cRNA], but not in TRPL (W713G) oocytes, basal Ca2+ inflow was inhibited by W13, an inhibitor of calmodulin action. Calmodulin (3 μM intracellular) inhibited basal Ca2+ inflow in TRPL but not in TRPL (W713G) or TRPL (W814G) oocytes. Staurosporin, an inhibitor of protein kinase C (PKC), inhibited, while PMA (an activator of PKC) stimulated, basal Ca2+ inflow in TRPL oocytes. In oocytes incubated in the presence of PMA (to suppress Ca2+ inflow through endogenous receptor-activated Ca2+ channels), the InsP3-induced stimulation of Ca2+ inflow through TRPL channels was more clearly evident than in oocytes incubated in the absence of PMA. InsP3 caused a significant stimulation of Mn2+ inflow in TRPL but not in mock oocytes. Rates of InsP3-stimulated Ca2+ inflow through the TRPL, TRPL (W713G) and TRPL (W814G) channels were similar. The ability of GTPγS to stimulate Ca2+ inflow through TRPL channels was inhibited by 50% in TRPL (W713G) oocytes but was unaffected in TRPL (W814G) oocytes. It is concluded that, in the environment of the Xenopus oocyte, the Drosophila TRPL channel is activated by (a) interaction with Ca2+/calmodulin at calmodulin-binding Site 1; (b) PKC; (c) InsP3 in a process that does not involve Ca2+ and calmodulin; and (d) a trimeric G-protein(s) through both a Ca2+/calmodulin-dependent and a Ca2+/calmodulin-independent mechanism.
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Melior, Hendrik, Siqi Li, Maximilian Stötzel, Sandra Maaß, Rubina Schütz, Saina Azarderakhsh, Aleksei Shevkoplias, et al. "Reprograming of sRNA target specificity by the leader peptide peTrpL in response to antibiotic exposure." Nucleic Acids Research 49, no. 5 (February 22, 2021): 2894–915. http://dx.doi.org/10.1093/nar/gkab093.

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Abstract Trans-acting regulatory RNAs have the capacity to base pair with more mRNAs than generally detected under defined conditions, raising the possibility that sRNA target specificities vary depending on the specific metabolic or environmental conditions. In Sinorhizobium meliloti, the sRNA rnTrpL is derived from a tryptophan (Trp) transcription attenuator located upstream of the Trp biosynthesis gene trpE(G). The sRNA rnTrpL contains a small ORF, trpL, encoding the 14-aa leader peptide peTrpL. If Trp is available, efficient trpL translation causes transcription termination and liberation of rnTrpL, which subsequently acts to downregulate the trpDC operon, while peTrpL is known to have a Trp-independent role in posttranscriptional regulation of antibiotic resistance mechanisms. Here, we show that tetracycline (Tc) causes rnTrpL accumulation independently of Trp availability. In the presence of Tc, rnTrpL and peTrpL act collectively to destabilize rplUrpmA mRNA encoding ribosomal proteins L21 and L27. The three molecules, rnTrpL, peTrpL, and rplUrpmA mRNA, form an antibiotic-dependent ribonucleoprotein complex (ARNP). In vitro reconstitution of this ARNP in the presence of competing trpD and rplU transcripts revealed that peTrpL and Tc cause a shift of rnTrpL specificity towards rplU, suggesting that sRNA target prioritization may be readjusted in response to changing environmental conditions.
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Dissertations / Theses on the topic "TRPL"

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Taylor, Richard Peter. "The development of X-ray Excited Optical Luminescence (XEOL) spectroscopic techniques for mineralogical and petrological applications." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3739.

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This thesis investigates the use of X-ray Excited Optical Luminescence (XEOL) and Time Resolved X-ray Excited Optical Luminescence (TR XEOL) within the Earth sciences. The project contains two primary objectives, the first of which is the design and building of a high-resolution luminescence spectroscopy facility. This includes the installation and commissioning of the facility on the I18 microfocus beamline at Diamond, the UK's national synchrotron facility. In describing the system's design and commissioning, I explore many implications of the technique. The second objective is using this new facility to investigate a suite of minerals to develop new analytical techniques utilizing XEOL and TR XEOL spectroscopy for applications within the Earth sciences. An aspect of this investigation is to explore the potential of Time Resolved Optically Derived X-ray Absorption Spectroscopy (TR OD XAS) of substitute trace elements in minerals. To date CW OD XAS has been shown to have very limited application within the Earth sciences. (Soderholm et al., 1998-120) The thesis explores differences between photoluminescence (PL) and XEOL responses in mineral systems, and investigates how these differences can be exploited. Luminescence, the phenomenon upon which the thesis is based, is a complex and poorly utilised phenomena within Earth sciences, it is however, orders of magnitude more sensitive, than many of the more accepted techniques used for the detection of trace elements, on this basis alone I would suggest it deserves further consideration. Luminescence techniques have developed much further in other disciplines; I therefore have incorporated many descriptions, models, and interpretations from other disciplines in order to identify methodologies and techniques that have the potential to be utilized in the study and interpretation of luminescence within the Earth sciences. The thesis demonstrates that luminescence in minerals with measured lifetimes, as fast as ~ 20 ps exist. Previously the recorded luminescent lifetimes, for minerals, in the literature are measured in ns. This finding leads to the novel concept that the measurement of TR XEOL with ps resolution combined with the measurement of the intensity of a luminescent signal as a function of excitation can provide significant new insights into the nature of the emission and the luminescent processes. I explore and demonstrate the potential of using dose dependence techniques of continuous wave and TR XEOL as a new analytical technique. I also demonstrate the use of a technique used extensively within Biology has an application with Earth sciences. The methodology incorporates the calculation of the natural lifetime of an emission through the relationship between the absorption and emission coefficients. (Strickler and Berg, 1962). I discuss how knowledge of the natural lifetime of an emission allows quantification of luminescence through measurement of a modified lifetime of emission. The quantification of a luminescent emission has significant potential within the geosciences one example being the identification of disputed emissions. I also consider the potential to use TR XEOL techniques in mapping complex heterogeneous rocks and minerals.
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Oberegelsbacher, Claudia [Verfasser], and Armin [Akademischer Betreuer] Huber. "Charakterisierung der lichtinduzierten Internalisierung des Ionenkanals TRPL aus Drosophila melanogaster / Claudia Oberegelsbacher. Betreuer: Armin Huber." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2013. http://d-nb.info/1032980869/34.

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El, Hajje Gilbert. "Développement de nouvelles méthodes de caractérisation optoélectroniques des cellules solaires photovoltaïques par imagerie de luminescence." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066604/document.

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La connaissance approfondie sur la luminescence des dispositifs photovoltaïques (PV) en a fait un outil de caractérisation puissant qui capte l'intérêt de la recherche et des industries du PV. Dans cette thèse, nous nous concentrons sur la luminescence des cellules solaires photovoltaïques à base de Cu(In,Ga)Se2. En particulier, nous explorons et revisitons ses dépendances temporelles, spectrales et spatiales. Cela a abouti dans un premier temps à la mise au point de nouvelles méthodes de caractérisation basée sur la luminescence de cette technologie PV en particulier. Nous montrons d’abord que par l’intermédiaire d'une méthode sans contact toute optique, nous sommes en mesure de détecter et de localiser les métastabilités de cette technologie. En utilisant une approche numérique basée sur des résultats expérimentaux de photoluminescence résolue en temps (TRPL) nous avions réussi à quantifier la densité des défauts de piégeage qui sont derrière ces métastabilités. Une fois quantifiée, nous traduisons cette densité en pertes absolues de performance PV de la cellule solaire. Ensuite, en explorant la dépendance spatiale de la luminescence des cellules solaires à base de Cu(In,Ga)Se2, nous avions corrélé avec succès, ses aspects temporels et spectrales en se basant sur la microscopie confocale à balayage et l’imagerie hyperspectrale. Cela nous a permis de généraliser nos résultats précédents à l'échelle globale des cellules solaires. Cette partie de la thèse nous a aidés à mieux comprendre une des origines fondamentales derrière l’inhomogénéité spatiale de la luminescence de ce type de dispositifs photovoltaïques.La dernière partie de la thèse était essentiellement technique et exploratoire. En particulier, nous introduisons une nouvelle technique optique dans le domaine de la caractérisation des dispositifs PV. Cette technique est dédiée à l’imagerie résolue en temps du temps de vie de fluorescence (TR-FLIM). Le principe de cette technique consiste essentiellement en acquisition d'images de luminescence du dispositif PV qui sont résolues temporellement. Avec ce nouveau dispositif expérimental, nous sommes maintenant en mesure de résoudre spatialement, et en temps réel la dynamique des porteurs de charge d'une technologie photovoltaïque donnée et accéder à ses propriétés électroniques clés. Une première démonstration a été faite sur une cellule solaire à base de GaAs, et pour laquelle nous avions extrait optiquement, la longueur de diffusion, la mobilité et le temps de vie de ses porteurs. De plus, nous avions pu estimer le coefficient de diffusion du matériau et son taux de dopage
The extensive knowledge on the luminescence of photovoltaic (PV) devices has made it a powerful characterization tool that captures the interest of both research and industrial PV communities. In this thesis, we focus on the luminescence of Cu(In,Ga)Se2-based solar PV. In particular, we explore and revisit the luminescence temporal, spectral and spatial dependencies. This resulted in the development of new luminescence-based characterization methods for this particular PV technology. We show initially that by means of an all-optical, contactless methodology, we are able to detect and localize the metastabilities of this technology. Using a numerical approach based on experimental time-resolved photoluminescence (TRPL) we managed to quantify the trapping defects that are behind these metastabilities. Once quantified, we translated it into absolute losses in the PV performance of the solar cell. By exploring the spatial dependence of the luminescence of Cu(In,Ga)Se2 solar cells, we successfully correlated its temporal and spectral aspects based on scanning confocal microscopy and hyperspectral imaging. This allowed us to generalize our previous findings at the global solar cell scale. This part of the thesis helped us better understand one of the fundamental origins behind the spatially inhomogeneous luminescence of Cu(In,Ga)Se2 PV devices. The final part of the thesis was mainly technical and exploratory. In particular, we introduced a new optical technique to the field of PV characterization. It is dedicated to time-resolved fluorescence lifetime imaging (TR-FLIM) which basically consists of acquiring time-resolved luminescence images of the PV device. With this new setup we are now able to spatially resolve, in real-time the charge carrier dynamics of a given PV technology and access its key electronic properties. A first application was made on a GaAs-based solar cell, for which we were able to optically extract the mobility, diffusion length and lifetime of its carriers. Finally, we were also able to estimate the diffusion coefficient of the material and its doping density
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Perera, Saranga D. "Investigation of exciton dynamics and electronic band structure of InP and GaAs nanowires." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1352993854.

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Pandey, Bimal. "Synthesis, Characterization, Structural, and Optical Properties of Zinc Oxide Nanostructures Embedded in Silicon Based Substrates." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500222/.

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Structural and optical properties of ZnO nanostructures synthesized by low energy ion implantation technique were examined. ZnO molecular ions were implanted into Si/SiO2 substrates at room temperature and then furnace annealed under different temperatures and environments. In all as-implanted samples only Zn nanostructures with varying diameters distributed into the Si/SiO2 matrices were observed. No trace of ZnO was found. The distributions of Zn nanostructures in Si/SiO2 closely matched results from Stopping and Range of Ions in Matter (SRIM) simulations. During annealing at 750 oC, Zn diffused both toward and away from the surface of the substrate and combine with oxygen to form ZnO nanostructures. At higher annealing temperatures ZnO bonding started to break down and transfer to zinc silicate (Zn2SiO4), and at 900 oC the ZnO was completely converted into Zn2SiO4. The average sizes of Zn/ZnO nanostructures depended on the ion fluence. If the fluence increased the average sizes of nanostructures also increased and vice versa. For room temperature photoluminescence (RT-PL), band-edge emission in the ultraviolet (UV) region was observed from all samples annealed at 700 oC/750 oC and were slightly blue shifted as compare to bulk ZnO. Donor-bound exciton (D,X) and acceptor-bound exciton (A,X) transitions were observed in low temperature photoluminescence (PL). The lifetime of both donor-bound excitonic emission (D, X) and acceptor-bound excitonic emission (A, X) were found to be in the picosecond (ps) range.
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Rakotonanahary, Georges. "Spectroscopie des transitions excitoniques dans des puits quantiques GaN/AlGaN." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00662445.

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Ce travail de thèse porte sur l'étude des propriétés optiques et électroniques des puits quantiques de GaN / AlGaN grâce à des techniques classiques de réflectivité résolue en angle et de photoluminescence, ainsi qu'avec la technique de photoluminescence résolue temporellement. Les expériences de photoluminescence en régime continu ont permis d'estimer les énergies des transitions excitoniques qui sont également accessibles en réflectivité. Ces techniques ont ainsi permis de mettre en évidence l'effet Stark dans les puits quantiques GaN / AlGaN. L'effet Stark sur les énergies de transition est cohérent avec la théorie des fonctions enveloppes. Les spectres de réflectivité permettent d'accéder à la force d'oscillateur des excitons grâce à leur modélisation par le formalisme des matrices de transfert, prenant en compte les phénomènes d'élargissement homogène et inhomogènes des transitions optiques. Enfin, les mesures de photoluminescence résolue en temps en fonction de la température, ont également permis d'extraire la force d'oscillateur qui est inversement proportionnelle au temps de recombinaison radiative. Cette étude a également permis de mettre en évidence l'effet Stark responsable de la diminution de la force d'oscillateur en fonction de l'épaisseur du puits quantique mais aussi en fonction de la composition d'aluminium. L'augmentation de l'épaisseur du puits entraîne une diminution du recouvrement des fonctions d'onde, et une augmentation de la composition d'aluminium intensifie le champ électrique et diminue également le recouvrement des fonctions d'onde.
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SINGH, MRITYUNJAY. "IVESTIGATIONS OF METAL ASSISTED TITANIUM DIOXIDE (TiO2) NANOCRYSTALS." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18623.

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7.1 Summary The research topic of the thesis entitled “Investigations of Metal Assisted Titanium Dioxide (TiO2) Nanocrystals” disclosed the structural, morphological, compositional and optical properties of TiO2 nanoparticles (NPs) and discussed their utility for photocatalytic applications. In the current thesis, TiO2 NPs were prepared using the sol-gel method and comprehensively explored their properties. The crystalline structural and optical characteristics of TiO2 NPs (like X-ray diffraction, absorption, photoluminescence, and time-resolved photoluminescence) along with photocatalytic applications have also been discussed in detail in the previous chapter. 7.2 Important Findings of Research Work Nanocrystals of anatase, mixed and rutile phases of TiO2 and metal-doped TiO2 have been synthesized via the sol-gel method. The prepared samples were characterized by various analytical tools. For the structural and surface morphology analysis, essential tools such as XRD, SEM and TEM were used. EDX analysis has been carried out for elemental identification present in prepared nanomaterials. TGA, FTIR spectroscopy, Raman spectroscopy, UV-visible & PL spectroscopy, time-resolved photoluminescence (TRPL) spectroscopy at varying temperatures were used to understand the structural and transitions following photoexcitation. TiO2 NPs were prepared by the sol-gel method with titanium isopropoxide as a precursor at different annealing temperatures. The analyzed XRD patterns, Raman and Fourier transform infrared spectra demonstrated the structural transformation from 160 amorphous to anatase and further to rutile phase while increasing annealing temperature. In addition, a mixed-phase of TiO2 NPs is formed, which consists of both phases. The absorption and photoluminescence (PL) spectra of mixed and rutile phases are shifted towards a longer wavelength region. The indirect band gap structure changed into the direct band gap during the structural transformation. Both absorption and PL spectra shifted towards lower energy regions, which might be due to the increase in size or the induced oxygen vacancies produced at a higher temperature. Furthermore, the photocatalytic activity of all the three different structural TiO2 NPs was examined. Furthermore, the photocatalytic performance of the different types of TiO2 NPs was examined through the degradation of a dye, rhodamine B (RhB), under UV radiation and measuring changes in absorption and PL spectra. The anatase phase structure shows higher photocatalytic activity than the rutile phase. However, the mix phase has the highest photocatalytic activity among all the structures, which degraded RhB entirely at a faster rate. On the other hand, the rutile phase is unable to take part in this process. Thus, the mix phase of TiO2 NPs is beneficial for industrial and environmental applications. The transition metal ions (Ag+, Cu2+, and Ni2+) doped and undoped TiO2 NPs have been synthesized using a cost-effective sol-gel method with a 1.0 wt% dopant concentration. The microstructure and chemical compositions of these NPs were examined using various techniques such as x-ray diffractometric, field emission scanning electron microscopy, high-resolution transmission electron microscopy, Fourier transform infrared and absorption and photoluminescence (PL) spectroscopy. The absorption and photoluminescence (PL)-excitation spectra of metal-doped TiO2 NPs are shifted to the longer wavelength region, which indicates a reduced bandgap than the bare TiO2 NPs. The absorption and PL spectra of methylene blue (MB) in the presence of undoped and metal ions doped TiO2 NPs show dramatic changes upon UV-irradiation. The absolute absorption 161 intensity reduced entirely and the solution of MB became colorless in the presence of UV irradiation. The PL of the degraded dye exhibits a new band in the shorter wavelength region, which has a multi-exponential decay function and an increased average PL lifetime. The dye degradation rate is higher for metal ions doped catalyst and highest for Cu2+ doped TiO2 NPs. Thus, Cu ions-doped TiO2 shows the highest photocatalytic activity. The order of catalytic degradation rate under UV irradiation was found to be Cu– TiO2 > Ni– TiO2 >Ag– TiO2 >anatase TiO2. The analysis of the PL spectra and PL-decays reveals the formation of smaller species that emits at a shorter wavelength region, thus helps in understanding the degradation of dye molecules. TiO2 NPs synthesized by employing the sol-gel routes and annealed at a different temperature from 400 to 900 °C. Three different nanostructures were formed, namely anatase, mixed (anatase/rutile) and rutile phases. The structure and morphology of as-synthesized NPs were confirmed using XRD and FESEM analysis. The XRD analysis of TiO2 NPs was carried out in the 290 K to 77 K temperature range and found no significant change in XRD patterns that means thermally stable TiO2 NPs. The PL spectra and contour maps of TiO2 NPs show that the anatase phase falls in the visible region. However, mixed and rutile phases fall in both visible and NIR regions as the temperature decreases from 290 K to 77 K. The visible PL band is ascribed to donor-acceptor recombination. In contrast, oxygen vacancies serve as donors and hydroxyl groups function as accepter sites. NIR PL band attributed to the trapped electrons in rutile TiO2, which recombine with free holes and intrinsic defects. The fast component of the decay processes was aided by the immediate formation of trapped electrons in luminescence sites. The indirect trap processes were responsible for the power-law component in the rutile phase, which was the recombination of trapped electrons formed via a deep trap state. It was observed that the electron-hole pairs thermally separated, preventing the formation of STEs directly. The PL 162 and PL decay studies under weak excitation conditions prove to be a more valuable and appropriate method to evaluate the trap states distribution and their carrier dynamic effects, which were vibrant to understand the photocatalytic processes better. Two-dimensional (2D) layered MoS2 nanosheets (NSs), which possess a vast range of unique properties and hold great potential for various applications. MoS2 NSs were synthesized by a hydrothermal method and the obtained NSs bear crystalline and layered structure. Absorption and electroabsorption (E-A) spectra of MoS2 doped in a PMMA thin film were measured at different temperatures (290-40 K). The E-A spectra observed at the second harmonic of the modulation frequency of the applied electric field (1.0 kHz) were analyzed with an integral method by assuming the Stark effect as a dominant feature. The absorption spectra consist of multiple transitions, among which five transitions are contributed to the E-A spectra. The changes in electric dipole moment (Δμ) and polarizability (Δα) of each transition were determined at different temperatures. Two electronic resonance states were identified for two excitonic bands of MoS2 NSs, which showed a strong E-A signal.
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El, Hajje Gilbert. "Développement de nouvelles méthodes de caractérisation optoélectroniques des cellules solaires photovoltaïques par imagerie de luminescence." Electronic Thesis or Diss., Paris 6, 2016. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2016PA066604.pdf.

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La connaissance approfondie sur la luminescence des dispositifs photovoltaïques (PV) en a fait un outil de caractérisation puissant qui capte l'intérêt de la recherche et des industries du PV. Dans cette thèse, nous nous concentrons sur la luminescence des cellules solaires photovoltaïques à base de Cu(In,Ga)Se2. En particulier, nous explorons et revisitons ses dépendances temporelles, spectrales et spatiales. Cela a abouti dans un premier temps à la mise au point de nouvelles méthodes de caractérisation basée sur la luminescence de cette technologie PV en particulier. Nous montrons d’abord que par l’intermédiaire d'une méthode sans contact toute optique, nous sommes en mesure de détecter et de localiser les métastabilités de cette technologie. En utilisant une approche numérique basée sur des résultats expérimentaux de photoluminescence résolue en temps (TRPL) nous avions réussi à quantifier la densité des défauts de piégeage qui sont derrière ces métastabilités. Une fois quantifiée, nous traduisons cette densité en pertes absolues de performance PV de la cellule solaire. Ensuite, en explorant la dépendance spatiale de la luminescence des cellules solaires à base de Cu(In,Ga)Se2, nous avions corrélé avec succès, ses aspects temporels et spectrales en se basant sur la microscopie confocale à balayage et l’imagerie hyperspectrale. Cela nous a permis de généraliser nos résultats précédents à l'échelle globale des cellules solaires. Cette partie de la thèse nous a aidés à mieux comprendre une des origines fondamentales derrière l’inhomogénéité spatiale de la luminescence de ce type de dispositifs photovoltaïques.La dernière partie de la thèse était essentiellement technique et exploratoire. En particulier, nous introduisons une nouvelle technique optique dans le domaine de la caractérisation des dispositifs PV. Cette technique est dédiée à l’imagerie résolue en temps du temps de vie de fluorescence (TR-FLIM). Le principe de cette technique consiste essentiellement en acquisition d'images de luminescence du dispositif PV qui sont résolues temporellement. Avec ce nouveau dispositif expérimental, nous sommes maintenant en mesure de résoudre spatialement, et en temps réel la dynamique des porteurs de charge d'une technologie photovoltaïque donnée et accéder à ses propriétés électroniques clés. Une première démonstration a été faite sur une cellule solaire à base de GaAs, et pour laquelle nous avions extrait optiquement, la longueur de diffusion, la mobilité et le temps de vie de ses porteurs. De plus, nous avions pu estimer le coefficient de diffusion du matériau et son taux de dopage
The extensive knowledge on the luminescence of photovoltaic (PV) devices has made it a powerful characterization tool that captures the interest of both research and industrial PV communities. In this thesis, we focus on the luminescence of Cu(In,Ga)Se2-based solar PV. In particular, we explore and revisit the luminescence temporal, spectral and spatial dependencies. This resulted in the development of new luminescence-based characterization methods for this particular PV technology. We show initially that by means of an all-optical, contactless methodology, we are able to detect and localize the metastabilities of this technology. Using a numerical approach based on experimental time-resolved photoluminescence (TRPL) we managed to quantify the trapping defects that are behind these metastabilities. Once quantified, we translated it into absolute losses in the PV performance of the solar cell. By exploring the spatial dependence of the luminescence of Cu(In,Ga)Se2 solar cells, we successfully correlated its temporal and spectral aspects based on scanning confocal microscopy and hyperspectral imaging. This allowed us to generalize our previous findings at the global solar cell scale. This part of the thesis helped us better understand one of the fundamental origins behind the spatially inhomogeneous luminescence of Cu(In,Ga)Se2 PV devices. The final part of the thesis was mainly technical and exploratory. In particular, we introduced a new optical technique to the field of PV characterization. It is dedicated to time-resolved fluorescence lifetime imaging (TR-FLIM) which basically consists of acquiring time-resolved luminescence images of the PV device. With this new setup we are now able to spatially resolve, in real-time the charge carrier dynamics of a given PV technology and access its key electronic properties. A first application was made on a GaAs-based solar cell, for which we were able to optically extract the mobility, diffusion length and lifetime of its carriers. Finally, we were also able to estimate the diffusion coefficient of the material and its doping density
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Majeed, Yasser. "Chemical modulation of human TRPC and TRPM ion channels." Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515551.

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Stumpf, Tobias [Verfasser], and Claudia [Akademischer Betreuer] Fecher-Trost. "Anreicherung und Charakterisierung von TRPV- und TRPC-Proteinen / Tobias Stumpf. Betreuer: Claudia Fecher-Trost." Kaiserslautern : Universitätsbibliothek Kaiserslautern, 2011. http://d-nb.info/1017120595/34.

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Books on the topic "TRPL"

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Kanevce, Ana. Impact of interface recombination on time resolved photoluminescence decays (TRPL) in CdTe solar cells (numerical simulation analysis). Golden, CO: National Renewable Energy Laboratory, 2012.

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Basov, Nikolaĭ. Trol Vozrozhdennyĭ. Moskva: ĖKSMO, 2002.

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Papagrēgoriou, Stelios. Gymna trol: Diēgēmata. Athēna: Ekdoseis Nephelē, 2013.

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Ferrer-Montiel, Antonio, and Tim Hucho, eds. TRP Channels. New York, NY: Springer New York, 2019. http://dx.doi.org/10.1007/978-1-4939-9446-5.

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ʻĀbid, Bashīr. Trel hanjuvān̲ dī: G̲h̲azlān̲. Gūjrānvālah: Farog̲h̲-i Adab Akādmī, 1985.

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Trpe i Evropa: (komedija). Skopje: Samizdat, 2019.

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Ekmečić, Ešref. U Bosni se belaj trpi. Tuzla: Harfo-Graf, 2001.

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Finch, D. J. The 1989 TRRL London taxi survey. Crowthorne: Transport and Road Research Laboratory, 1992.

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ResearchLaboratory, Transport and Road, ed. List of TRRL reports and digests. Crowthorne, Berks: Transport and Road Research Laboratory, 1985.

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Transport and Road Research Laboratory. Technical Information and Library Services. Digest of TRRL reports January 1987. Crowthorne: Transport and Road Research Laboratory, 1987.

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Book chapters on the topic "TRPL"

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Gonçalves, João, Helena Soares, Norman L. Eberhardt, Sarah C. R. Lummis, David R. Soto-Pantoja, David D. Roberts, Umadas Maitra, et al. "TRPL." In Encyclopedia of Signaling Molecules, 1942. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0461-4_101409.

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Huber, Armin. "Invertebrate Phototransduction: Multimolecular Signaling Complexes and the Role of TRP and TRPL Channels." In Transduction Channels in Sensory Cells, 179–206. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527603913.ch8.

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Raj, Satish R., S. R. Wayne Chen, Robert S. Sheldon, Arti N. Shah, Bharat K. Kantharia, Ulrich Salzer, Bodo Grimbacher, et al. "TRPS." In Encyclopedia of Molecular Mechanisms of Disease, 2120. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-29676-8_7055.

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Hardie, Roger C. "Photosensitive TRPs." In Handbook of Experimental Pharmacology, 795–826. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05161-1_4.

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McKemy, David D. "TRPM Channels." In Textbook of Ion Channels Volume II, 351–68. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003096276-23.

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Rosenbaum, Tamara. "TRPV Channels." In Textbook of Ion Channels Volume II, 369–86. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003096276-24.

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Tian, Jin Bin, and Michael X. Zhu. "TRPC Channels." In Textbook of Ion Channels Volume II, 337–50. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003096276-22.

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Gonçalves, João, Helena Soares, Norman L. Eberhardt, Sarah C. R. Lummis, David R. Soto-Pantoja, David D. Roberts, Umadas Maitra, et al. "TRP." In Encyclopedia of Signaling Molecules, 1935. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0461-4_101407.

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Sexton, Jane E., Jeffrey Vernon, and John N. Wood. "TRPs and Pain." In Handbook of Experimental Pharmacology, 873–97. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05161-1_6.

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Zanini, Damiano, and Martin C. Göpfert. "TRPs in Hearing." In Handbook of Experimental Pharmacology, 899–916. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05161-1_7.

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Conference papers on the topic "TRPL"

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Kuhl, J., R. Strobel, R. Eccleston, and K. Köhler. "Competition Between Tunneling and Exciton Formation of Photoexcited Carriers in Asymmetric Double Quantum Wells." In Picosecond Electronics and Optoelectronics. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/peo.1991.wd4.

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Time-resolved photoluminescence (TRPL) spectroscopy has been utilized by various groups to determine resonant and nonresonant tunneling times of electrons as well as of holes in asymmetric double quantum well (ADWQ) structures /1-4/. The main disadvantage of the TRPL method arises from the fact that it is impossible to measure electron and hole tunneling times simultaneously or to determine hole tunneling times directly in the absence of an electric field. These drawbacks are inherent to the linear TRPL technique since the photoluminescence (PL) decay time of the narrow quantum well (QWn) depends only on the tunneling time of the carrier type which tunnels faster.
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Massa, J. S., G. S. Buller, and A. C. Walker. "Picosecond time-resolved photoluminescence spectroscopy of III–V and II–VI semiconductor structures." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.thff8.

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An all-solid-state, microscope-based time-resolved photoluminescence (TRPL) system has been developed for studying excess carrier dynamics, from the picosecond to the microsecond time domains, in III-V and n-VI semiconductor structures. The system employs laser diode excitation sources and a silicon single photon avalanche diode detector, and it allows TRPL measurements in the spectral region from 430 nm to ~1 μm. By using a 780 nm excitation source, the high spatial resolution of the system (<3 μm) has facilitated the examination of GaAs/AlGaAs MQW microresonator structures fabricated by alloy mixing techniques. These structures have important applications as surface-emitting lasers and as all-optical non-linear devices based on electronic band-filling nonlinearities. For each of these, a knowledge of carrier lifetime is of fundamental importance. Effective lateral carrier confinement is demonstrated in individual square pixels of various sizes, between 2 and 50 μm, with no significant reduction in carrier lifetime. The increasing importance of "wide-gap" II-VI semiconductors for the fabrication of blue light emitting diodes and laser diodes has led to the requirement for routine TRPL measurements on these materials. The integration of a frequency-doubled laser diode source, emitting at 420 nm, has permitted TRPL measurements to be performed on both n-and p-type ZnSe of various doping densities.
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Kanevce, Ana, Darius Kuciauskas, Timothy A. Gessert, Dean H. Levi, and David S. Albin. "Impact of interface recombination on time resolved photoluminescence (TRPL) decays in CdTe solar cells (numerical simulation analysis)." In 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC). IEEE, 2012. http://dx.doi.org/10.1109/pvsc.2012.6317736.

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Jundt, Pascal, Darius Kuciauskas, and James Sites. "Simulating the Effect of p-n Junction Fields on TRPL Transients of Thin-Film CdTe Solar Cells." In 2020 IEEE 47th Photovoltaic Specialists Conference (PVSC). IEEE, 2020. http://dx.doi.org/10.1109/pvsc45281.2020.9300522.

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Buschmann, Volker, Eugeny Ermilov, Felix Koberling, Rainer Erdmann, Christian Oelsner, and Jürgen Breitlow. "Integration of a superconducting nanowire detector into a confocal microscope for TRPL-mapping: sensitivity and time resolution." In Single Molecule Spectroscopy and Superresolution Imaging XVI, edited by Ingo Gregor, Rainer Erdmann, and Felix Koberling. SPIE, 2023. http://dx.doi.org/10.1117/12.2647548.

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Kretzschmar, Steffen, Sergej Levcenco, Justus Just, Alex Redinger, and Thomas Unold. "Radiative recombination from localized states in CZT(S, Se) investigated by combined PL and TRPL at low temperatures." In 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). IEEE, 2016. http://dx.doi.org/10.1109/pvsc.2016.7749571.

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Molloy, C. H., D. J. Somerford, P. Blood, and A. K. Wood. "Time-resolved photoluminescence study of 1.58 µm InGaAs/InGaAsP quantum wells." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cwl5.

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In this paper we report direct measurements of carrier recombination at 1.58 µm via time-correlated single photon counting using a Ge single-photon avalanche photodiode with time resolution of 300 ps. Under high optical excitation, this provides a means for assessing the contribution of Auger processes. These are believed to play a role in the high temperature sensitivity of 1.5 µm lasers although to what extent remains unclear. The strained (1% compressive) and unstrained samples mimicked our laser structures (four and 5 30 Å InGaAs quantum wells with 150 Å InGaAsP barriers lattice matched to InP) but were nominally undoped throughout (background~5 × 1015 cm−3,n-type) Fits to the data were calculated using the initial photogenerated earner density (Δn(t=0)) and Auger coefficient (CA) as fitting parameters and included radiative, extrinsic non-radiative and Auger recombination. For example, fitting the room temperature photoluminescence decay for a strained sample gave CA= 1.0 × 10−28 cm6 s−1 and Δn(t=0) = 3.5 ×1017 cm−3, typical of the sample set. At this initial carrier density, Auger accounts for 13% of the total recombination. Fit quality is degraded if Auger recombination is omitted. This value for CA is greater than previously measured (1.3 × 10-29 cm6 s-1 [1]), and has important implications for laser operation. In order to explore the relation between the time-resolved photoluminescence results (TRPL) and the laser devices in more detail, we have studied lasers with similar layer structures to the time-resolved photoluminescence samples and cavity lengths the range 300- 1160 µm. The temperature dependence of the threshold current shows two distinct regions; for T=230-340K threshold current increases exponentially with temperature, whilst above 340K it increases super-exponentially. By comparing these results with the TRPL studies as a function of temperature we are able to assess the relative contribution of Auger recombination in these samples.
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Eccleston, R., B. F. Feuerbacher, J. Kuhl, W. W. Rühle, and K. Ploog. "Increase in Exciton Radiative Lifetime in GaAs Quantum Wells at High Exciton Density due to Exciton-Exciton Scattering." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/up.1992.thc21.

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We report time-resolved photoluminescence (TRPL) measurements of the radiative lifetime (τr) at 1.8K of resonantly excited heavy-hole excitons in a 27nm GaAs single quantum well as a function of exciton density. By the use of AlAs interface smoothing layers [1], the sample exhibits very little inhomogeneous broadening (≈0.15meV). The exciton centre of mass motion is therefore not significantly restricted by localisation in well width fluctuation islands. However, measurements of the exciton homogeneous linewidth (Γ h ) using time-resolved degenerate four wave mixing in the self-diffraction configuration (Fig.1) [2], additionally show that the sample imperfection scattering contribution to the Γ h of these delocalised excitons is also small (0.2meV). Thus, as indicated by the dependence of Γ h on exciton density (N x ), even at moderate exciton densities, exciton-exciton scattering is the dominant dephasing interaction within the photocreated exciton ensemble.
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Louis, Thomas A. "Investigation of Picosecond Time-Resolved Photoluminescence in Gallium Arsenide with 3-μm Spatial Resolution." In Picosecond Electronics and Optoelectronics. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/peo.1989.hsmt39.

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A novel instrument has recently been developed for picosecond time-resolved photoluminescence (TRPL) investigation of GaAs with 3 μm spatial resolution : the Photoluminescence Lifetime Microscope Spectrometer (PLμS). The PLμS is based on time-correlated single photon counting (TCSPC) with a single photon avalanche diode (SPAD) detector. Sensitivity of the PLμS, especially in the near infrared wavelength region (800-1000nm), is several orders of magnitude better than for synchroscan streak cameras. A signal-to-noise ratio of better than 1000:1 is typically obtained from a GaAs sample region of 3 μm diameter at room temperature and at excess carrier densities (at peak excitation) as low as 1015cm-3. As a result of the very low optical power requirements, a pulsed diode laser can be used as the excitation source. All signals are conveniently handled via optical fiber, which makes the PLμS a unique instrument for routine assessment of semiconductor materials and devices in an industrial environment.
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Kuciauskas, Darius, Joel N. Duenow, Ana Kanevce, Jian V. Li, Matthew R. Young, Pat Dippo, and Dean H. Levi. "Optical-fiber-based, time-resolved photoluminescence spectrometer for thin-film absorber characterization and analysis of TRPL data for CdS/CdTe interface." In 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC). IEEE, 2012. http://dx.doi.org/10.1109/pvsc.2012.6317927.

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Reports on the topic "TRPL"

1

Drey, N., W. Housley, and A. Mcnight. TRP CUTTER HEAD IMPROVEMENT. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1568796.

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Engel, David W., and Angela C. Dalton. TRL Computer System User?s Guide. Office of Scientific and Technical Information (OSTI), January 2014. http://dx.doi.org/10.2172/1131374.

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HOUSLEY, WILLIAM. SR19036 - IMPROVE TRP CUTTER HEAD PERFORMANCE. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1669095.

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HOUSLEY, WILLIAM. SR19036 IMPROVE TRP CUTTER HEAD PERFORMANCE. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1669096.

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Dr. Richard J. Fruehan and Dr. R. J. Matway. Optimization of Post Combustion in Steelmaking (TRP 9925). Office of Scientific and Technical Information (OSTI), March 2004. http://dx.doi.org/10.2172/840945.

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Alan W. Cramb. Quantifying the Thermal Behavior of Slags (TRP 9903). Office of Scientific and Technical Information (OSTI), May 2003. http://dx.doi.org/10.2172/840954.

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Hair, L. M. Draft of final report for the aerocapacitor TRP. Office of Scientific and Technical Information (OSTI), August 1996. http://dx.doi.org/10.2172/539854.

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Mane, Vibha, and Tom Shea. Implementation of the TRL Algorithm for Improved Impedance Measurements. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/1119182.

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Dr. Anthony J. DeArdo. Reducing the Variability of HSLA Sheet Steels (TRP 9807). Office of Scientific and Technical Information (OSTI), March 2004. http://dx.doi.org/10.2172/840949.

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Bartel, J., A. J. Johnson, and W. Wall. TRL cleanup, transition and reutilization project requirements and plans. Office of Scientific and Technical Information (OSTI), February 1997. http://dx.doi.org/10.2172/477681.

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