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Dissertations / Theses on the topic 'Triplett'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Reineke, Sebastian. "Controlling Excitons: Concepts for Phosphorescent Organic LEDs at High Brightness." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-39520.

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This work focusses on the high brightness performance of phosphorescent organic light-emitting diodes (OLEDs). The use of phosphorescent emitter molecules in OLEDs is essential to realize internal electron-photon conversion efficiencies of 100 %. However, due to their molecular nature, the excited triplet states have orders of magnitude longer time constants compared to their fluorescent counterparts which, in turn, strongly increases the probability of bimolecular annihilation. As a consequence, the efficiencies of phosphorescent OLEDs decline at high brightness – an effect known as efficienc
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2

Heinrich, G. [Verfasser]. "Strahlungslose Desaktivierung von aromatischen Kohlenwasserstoffen in Triplett-Zustaenden / G. Heinrich." Karlsruhe : KIT-Bibliothek, 2009. http://d-nb.info/118690481X/34.

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3

Weigl, Peter [Verfasser], Thomas [Akademischer Betreuer] Blochowicz, and Thomas [Akademischer Betreuer] Walther. "Sonden für die Triplett-Solvatationsdynamik / Peter Weigl ; Thomas Blochowicz, Thomas Walther." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-186103.

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4

Krames, Bert. "Räumliche Konzentrationsverteilungen von N2-Triplett-Zuständen im elektrodennahen Plasma einer RF-Niederdruckentladung." Doctoral thesis, Universitätsbibliothek Chemnitz, 2000. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200000269.

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Im Niedertemperaturplasma einer Stickstoff-Hochfrequenzgasentladung werden mit Hilfe der plasmadiagnostischen Methoden LIF und OES räumliche Konzentrationsprofile der N2-Triplett-Zustände A, B und C in verschiedenen Schwingungsniveaus studiert. Dabei wird die Druckabhängigkeit im Bereich 30 bis 100 Pa und die Abhängigkeit von der Brennspannung bis 250 V untersucht. Die deutlich unterschiedlichen räumlichen Verteilungen der verschiedenen Spezies werden mit Hilfe einer Modellierung beschrieben, die sowohl Elektronenstoßanregung in der Plasmarandschicht als auch Diffusion, Stoßabregung, Kaskadenp
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Krames, Bert. "Räumliche Konzentrationsverteilungen von N2-Triplett-Zuständen im elektrodennahen Plasma einer RF-Niederdruckentladung." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962394483.

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6

Hübert, Rolf. "Bimolekulare Reaktionen super-elektrophiler Triplett-Carbene in kryogenen Matrizes und organischen Gläsern." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=959089322.

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7

Tronnier, Alexander [Verfasser]. "C-C* cyclometallierte Platin(II) N-heterocyclische Carbenkomplexe als Triplett-Emitter / Alexander Tronnier." München : Verlag Dr. Hut, 2014. http://d-nb.info/105385983X/34.

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8

Hölzl-Hobmeier, Alena [Verfasser]. "Enantioselektivität in katalytischen Photoreaktionen mit sichtbarem Licht durch Triplett-Sensibilisierung / Alena Hölzl-Hobmeier." München : Verlag Dr. Hut, 2020. http://d-nb.info/1219476692/34.

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9

Schödel, René. "Zur Kinetik von Singulett- und Triplett-Anregungen im Lichtsammelkomplex des Photosystems II höherer Pflanzen (LHCII)." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=958166161.

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10

Wendland, Oliver [Verfasser]. "Triplett-Zustände aromatischer Moleküle in organisch-anorganischen Schichtkristallen : Optische Spektroskopie und Nullfeld-ODMR / Oliver Wendland." Aachen : Shaker, 2003. http://d-nb.info/1181600960/34.

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11

Steiner, Florian [Verfasser], and JOHN M. [Akademischer Betreuer] LUPTON. "Triplett-Signaturen in der Photonenkorrelation der Lumineszenz organischer Halbleiter / Florian Steiner ; Betreuer: John M. Lupton." Regensburg : Universitätsbibliothek Regensburg, 2018. http://d-nb.info/1150959193/34.

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12

Schödel, René. "Zur Kinetik von Singulett- und Triplett-Anregungen im Lichtsammelkomplex des Photosystems II höherer Pflanzen (LHCII)." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 1999. http://dx.doi.org/10.18452/14377.

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Das Anliegen dieser Arbeit besteht darin, die Kinetik von elektronischen Singulett- und Triplett-Anregungen innerhalb des solubilisierten Lichtsammelkomplexes des Photosystem II (LHCII) zu untersuchen. Die Untersuchungen gliedern sich in drei Teilkomplexe: Klärung der Frage, in welchem Maße die gegenseitige Wechselwirkung zwischen angeregten Singulett-Zuständen (Singuletts)zu deren Vernichtung führt. Um dies zu analysieren, wurden Messungen zur nichtlinearen Fluoreszenz von LHCII in einem großen Bereich der Anregungsimpuls-Intensität durchgeführt. Dazu war es notwendig, eine Methode zu entw
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13

Tröster, Andreas [Verfasser], Thorsten [Akademischer Betreuer] Bach, Thorsten [Gutachter] Bach, and Wolfgang [Gutachter] Eisenreich. "Enantioselektive, Triplett-sensibilisierte Photoreaktionen mit sichtbarem Licht / Andreas Tröster ; Gutachter: Thorsten Bach, Wolfgang Eisenreich ; Betreuer: Thorsten Bach." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1177241463/34.

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14

Fischer, Tobias [Verfasser], and Hartmut [Akademischer Betreuer] Yersin. "Platin(II)- und Iridium(III)-Triplett-Emitter für OLED-Anwendungen - Detaillierte Charakterisierung ihrer Lumineszenzeigenschaften / Tobias Fischer. Betreuer: Hartmut Yersin." Regensburg : Universitätsbibliothek Regensburg, 2010. http://d-nb.info/1023281899/34.

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15

Meyer, Deborah [Verfasser], Till [Forscher] Biskup, Stefan [Akademischer Betreuer] Weber, Michael [Akademischer Betreuer] Sommer, and Thorsten [Akademischer Betreuer] Koslowski. "ESR-spektroskopische Untersuchungen lichtinduzierter Zustände in Materialien mit Relevanz für die organische Elektronik : : Morphologie, Delokalisation, Entstehungswege von Triplett-Zuständen." Freiburg : Universität, 2017. http://d-nb.info/1153711702/34.

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16

Hörmann, Fabian Martin [Verfasser], Thorsten [Akademischer Betreuer] Bach, Thorsten [Gutachter] Bach, and Lukas [Gutachter] Hintermann. "[2+2]-Photocycloadditionsreaktionen von Eniminiumionen durch Triplett-Sensibilisierung / Fabian Martin Hörmann ; Gutachter: Thorsten Bach, Lukas Hintermann ; Betreuer: Thorsten Bach." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1211725413/34.

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17

Kasemann, Daniel. "OLEDs under High Current Densities." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-84463.

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This work focuses on a better understanding of the behavior of organic light emitting devices (OLEDs) under intense electrical excitation. Attaining high exciton densities in organic semiconductors by electrical excitation is of special interest for the field of organic semiconductor lasers (OSLs). In these devices, the high singlet exciton density needed in the active layer to obtain population inversion is easily created by pulsed optical pumping, but direct electrical pumping has not been achieved yet. First, the steps necessary to achieve stable high current densities in organic semiconduc
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18

Gontcharov, Julia [Verfasser], and Wolfgang [Akademischer Betreuer] Zinth. "Reaktionen von Pyrimidin-Dimeren und Psoralen im Triplett-Kanal : Infrarotspektroskopie von CPD-Bildung und Photoaddition / Julia Gontcharov ; Betreuer: Wolfgang Zinth." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1236502353/34.

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19

Talluto, Vincenzo [Verfasser], Thomas [Akademischer Betreuer] Walther, and Thomas [Akademischer Betreuer] Blochowicz. "Triplett-Solvatationsdynamik als Methode zur Untersuchung der molekularen Dynamik von Flüssigkeiten unter räumlicher Einschränkung / Vincenzo Talluto. Betreuer: Thomas Walther ; Thomas Blochowicz." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2016. http://d-nb.info/1112141758/34.

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20

Vosskötter, Stefan [Verfasser], Rainer [Akademischer Betreuer] Weinkauf, and Michael [Akademischer Betreuer] Schmitt. "Hochauflösende Radikal-Anionen-Photoelektronen- Spektroskopie von konjugierten Aromaten: Simultane Spektroskopie von Singulett- und Triplett-Zuständen / Stefan Vosskötter. Betreuer: Rainer Weinkauf. Gutachter: Michael Schmitt." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2016. http://d-nb.info/1081214406/34.

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21

Ammermann, Sven [Verfasser], and Mont Wolf-Walther [Akademischer Betreuer] du. "Iridiumkomplexe auf Basis von 2-Methyl-3-phenylchinoxalinen – Hocheffiziente und stabile Triplett-Emitter für Organische Leuchtdioden / Sven Ammermann ; Betreuer: Wolf-Walther du Mont." Braunschweig : Technische Universität Braunschweig, 2009. http://d-nb.info/1175891363/34.

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22

Ferreira, Giovana Chimello. "\"Fotopolimerização iniciada por tioxantona e outros indicadores - Estudos fundamentais e aplicações\"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-29012007-112944/.

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A cinética de fotopolimerização do monômero metacrilato de metila (MMA) foi investigada usando o fotoiniciador tioxantona (TX) e o co-iniciador trietilamina (TEA), a fim de elucidar o mecanismo de fotopolimerização. A dilatometria foi usada como técnica para a determinação das cinéticas de polimerização. Determinaram-se os rendimentos quânticos de polimerização. Os estados excitados foram estudados por fluorescência estática para determinar as constantes de supressão de fluorescência pela amina e pelo monômero. Medidas de fotólise por pulso de laser permitiram obter o espectro de absorção trip
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23

Piriou, Jean-Marc. "Construction et utilisation d'une base de données de triplets pour la modélisation de triples hélices d'ADN." Châtenay-Malabry, Ecole centrale de Paris, 1992. http://www.theses.fr/1992ECAP0244.

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A partir des données expérimentales dont on dispose sur les triples hélices - diffraction de rayons X par des fibres de polynucléotides triple brin, et cristallographie de l’ARN de transfert -, nous avons déduit des principes et des règles grâce auxquels nous avons construit une base de données structurales de 64 triplets. Nous avons ainsi envisagé, pour les triplets ATT, GCC+ et GCG, toutes les combinaisons possibles pour ce qui concerne l'appariement de troisième brin, l'orientation de sa chaîne sucre-phosphate, et son anomérie - alpha ou beta. Nous avons ensuite utilisé cette base de donnée
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24

Deng, Fan. "Photon Upconversion Based on Triplet-Triplet Annihilation." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1395249331.

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25

Piper, Roland. "Bimolecular triplet-triplet annihilation upconversion for photovoltaics." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24858.

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Organic upconversion of photons through triplet energy exchange between two or more molecules (OUC) has been investigated through transient absorption and fluorescence spectroscopy, kinetic rate modelling and morphological analysis of thin films. An OUC system, consisting of one sensitising molecule (PQ4Pd) and an emitting molecule (rubrene), was first studied to explore the possibility of modelling the entire OUC process with a kinetic rate model. Transient absorption spectroscopy allowed for the intermediate steps of OUC to be directly observed and fitted, producing rate constants for each s
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26

Wilke, Bryn. "UPCONVERTING LOW POWER PHOTONS THROUGH TRIPLET-TRIPLET ANNIHILATION." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1335378364.

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27

Alazemi, Abdulrahman. "Investigation of Factors in Triplet-Triplet Annihilation Upconversion." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1521189118425574.

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28

Ruß, Carsten. "From Triplet Correlations to Triplet Interactions in Colloidal Suspensions." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-36883.

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29

Cao, Xian. "Investigation of Photochemical Upconversion Based on Triplet-Triplet Annihilation." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1455209554.

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30

Nazarova, Nadzeya [Verfasser]. "Minimally-invasive Theranostics based on Triplet-Triplet Annihilation / Nadzeya Nazarova." Mainz : Universitätsbibliothek der Johannes Gutenberg-Universität Mainz, 2020. http://d-nb.info/1224895630/34.

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31

Benco, John S. "Singlet-singlet and triplet-triplet energy transfer in polychromophoric peptides." Link to electronic thesis, 2000. http://www.wpi.edu/Pubs/ETD/Available/etd-0803100-103547.

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32

Hope, Adam John. "Fluorinated emitter molecules for triplet-triplet annihilation up-conversion media." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10623/.

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This thesis details the synthesis, characterisation and photophysical properties of various fluorinated emitters for triplet-triplet annhilation up-conversion systems. The theory and mechanism of TTAUC is evaluated and the molecular design of the annihilating emitter molecule reviewed to allow improvement of the external up-conversion quantum yield and overall energy efficiency of the process. Three main series of chromaphores were investigated, based on diphenylanthracenes, bisphenylperylenes, and 3,5,8-triphenylBODIPYs. These were synthesised by metal catalysed aryl-aryl coupling (Suzuki-Miy
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33

Culham, Stacey. "Polymetallic triplet emitters." Thesis, Northumbria University, 2013. http://nrl.northumbria.ac.uk/36124/.

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This work is concerned with the synthesis and property investigation of a relatively new class of cyclometallated Ir(III) and Pt(II) complexes in which two metal centres are coordinated to a common heterocycle resulting in a rigid polymetallic assembly. Highly luminescent materials which can emit and absorb in a red region of the spectrum were targeted. There are three main parts of the thesis. The first part investigates how luminescent properties of the diplatinum systems are affected by the bridging ligand. A series of novel mono- and dinuclear Pt(II) complexes has been prepared and their l
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34

Guler, Mustafa Ozgur. "Singlet-singlet and triplet-triplet energy transfer in bichromophoric cyclic peptides." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0513102-151609.

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35

Westbrook, Emily Grace. "Development and Investigation of Methods for Improving Triplet-Triplet Annihilation Upconversion." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1583154398097115.

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36

Scurachio, Regina Spricigo. "Reatividade de lipídeos e metabólitos da cafeína frente a estados excitados de flavinas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/75/75133/tde-16122015-110448/.

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A presente tese descreve o estudo cinético e mecanístico da desativação do estado singlete- e triplete-excitado de flavinas por esteróis (colesterol e ergosterol), vitamina D, coenzima Q10, vitamina K, ácidos graxos e metabólitos da cafeína. Através da análise de Stern-Volmer da supressão de fluorescência da riboflavina pelo colesterol, ergosterol, vitamina D, vitamina K, e pela coenzima Q10 observa-se que o estado singlete excitado da riboflavina é desativado com constante de velocidade superior ao limite da difusão. No entanto, a presença de colesterol, ergosterol, vitamina D, vitamina K e c
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37

García, Pepin Mateo. "Supersymmetry with custodial triplets." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/386526.

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Gracias a resultados experimentales pero tambien a argumentos teoricos, sabemos que el Modelo Estandar de la fsica de partculas es solo una descripcion a bajas energas de una estructura mas fundamental. Supersimetra, una simetra del espacio-tiempo que relaciona bosones y fermiones, proporciona algunos de los candidatos para completar el Modelo Estandar mas favorecidos desde un punto de vista teorico. Sin embargo, la busqueda sin resultado de partculas supersimetricas pone a estos modelos bajo cierta tension, sobre todo porque muchas de las propiedades de supersimetr a en su aplicacion a
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38

Velazquez, Orlando Cigarroa. "Estudo da supercondutividade nos sistemas intermetálicos não-centrossimétricos de composição YCo1-xC2 e Lu1-xThxNiC2." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/97/97135/tde-25022016-095616/.

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Recentemente, os compostos não-centrossimétricos têm sido intensamente estudados devido à grande variedade de comportamentos magnéticos, os quais são induzidos pela ausência de centro de simetria na sua estrutura cristalográfica. Esta assimetria induz uma modificação na estrutura de bandas, causando um acoplamento spin-orbita antissimétrico quem é responsável por mecanismos de interação magnética inusuais. A supercondutividade em este tipo de compostos apresenta propriedades que divergem do comportamento esperado pela teoria BCS. Neste trabalho será apresentado um estudo sobre a investigação d
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39

Paquet, Joseph. "Potentialités anti-inflammatoires de l'inhibition génomique et transcriptionnelle du TNF-[alpha] par une approche de type oligonucléotidique." Thesis, Nancy 1, 2010. http://www.theses.fr/2010NAN10067/document.

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Le Tumor Necrosis Factor alpha (TNF-[alpha]) est une cytokine pro-inflammatoire qui occupe un rôle central dans la physiopathologie de nombreuses pathologies inflammatoires et particulièrement l'arthrite. La neutralisation de cette cytokine par l'utilisation d'anticorps anti-TNF-[alpha] a montré son efficacité dans la polyarthrite rhumatoïde et est aujourd'hui le traitement de référence pour la prise en charge de cette pathologie. Cependant, un tiers des patients traités par anticorps anti-TNF restent réfractaires ou ne répondent pas à ce traitement. Dans ce contexte, il apparait nécessaire de
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40

Freeman, David Martin Eric. "Manipulating triplets in organic semiconductors." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10050007/.

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Triplet states in organic semiconducting devices are often associated with loss processes. Radiative decay to the ground state is a spin disallowed process, which results in triplets in normal organic systems decaying primarily though non-radiative pathways. In OLEDs, where 75% of created excitons are triplets, this has a large impact on device efficiency. The work herein focusses on the synthesis of organic polymers that utilise triplet states in some useful fashion. This was first achieved through incorporation of a heavy metal in the polymer chain, which increased spin-orbit coupling and al
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41

Bobga, Benkam Benedict. "Bicyclic Mixed Triple Systems." Digital Commons @ East Tennessee State University, 2005. https://dc.etsu.edu/etd/1043.

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In the study of triple systems, one question faced is that of finding for what order a decomposition exists. We state and prove a necessary and sufficient condition for the existence of a bicyclic mixed triple system based on the three possible partial orientations of the 3-cycle with twice as many arcs as edges. We also explore the existence of rotational and reverse mixed triple systems. Our principal proof technique applied is the difference method. Finally, this work contains a result on packing of complete mixed graphs on v vertices, Mv, with isomorphic copies of two of the mixed triples
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42

Klima, Rodney F. "Triplet Alkyl Nitrene Intermediates: Photolysis of Alkyl Azides with Intermolecular and Intramolecular Triplet Sensitization." Cincinnati, Ohio : University of Cincinnati, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1100710601.

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43

Vella, Jarrett H. "Singlet and triplet excitons in organic and organometallic thin films diffusion and triplet sensitization /." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025163.

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44

Wu, Tony Chang-Chi. "Development in utilizing singlet fission and triplet-triplet annihilation to improve solar cell efficiency." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115783.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 107-113).<br>Our main energy source are burning fossil fuels. Solar energy is a clean, sustainable energy source that does not emit greenhouse gas that causes global warming. In this thesis, singlet fission and triplet-triplet annihilation would be discussed and studied to increase solar cell power conversion efficiency. Singlet fission splits a singlet exciton into two lower energy triplet
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45

Berkowicz, Sharon, Helena Olsson, and Henrik Broberg. "Evaluation of Amyloid Fibrils as Templates for Photon Upconversion by Sensitized Triplet-Triplet Annihilation." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215658.

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In the face of global warming and shrinking resources of fossil fuels the interest in solar energy has increased in recent years. However, the low energy and cost efficiency of current solar cells has up to this date hindered solar energy from playing a major role on the energy market. Photon upconversion is the process in which light of low energy is converted to high energy photons. Lately, this phenomenon has attracted renewed interest and ongoing research in this field mainly focuses on solar energy applications, solar cells in particular. The aim of this study was to investigate and evalu
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46

Geiß, Barbara. "Donor-Acceptor Substituted Triplet Emitters." kostenfrei, 2009. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2009/3972/.

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47

LEJEUNE, NOZAL VIOLAINE. "Fluorescence triplet-triplet et alignement de spin du biradical m-xylylene et de ses derives methyles." Paris 11, 1990. http://www.theses.fr/1990PA112334.

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Le biradical m-xylydene et ses derives methyles se forment par photolyse uv des derives methyles du benzene en matrice shpolskii a 5-20 k. Ces especes sont detectees par spectroscopie de fluorescence, en utilisant la technique laser de selection de site. L'energie de la premiere transition triplet-triplet ainsi determinee experimentalement est comparee a la valeur theorique deduite d'un calcul semi-empirique scf-mo avec ic. Le declin non-exponentiel de la fluorescence des biradicaux m-xylylenes est attribue a la fluorescence emise a partir de differents sous-niveaux de l'etat triplet. L'emissi
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48

Yokoyama, Takehito, Seiichiro Onari, and Yukio Tanaka. "Enhanced triplet superconductivity in noncentrosymmetric systems." American Physical Society, 2007. http://hdl.handle.net/2237/11291.

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49

Asano, Yasuhiro, Yukio Tanaka, Alexander A. Golubov, and Satoshi Kashiwaya. "Conductance Spectroscopy of Spin-Triplet Superconductors." American Physical Society, 2007. http://hdl.handle.net/2237/11290.

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50

Mazidian, Bayan. "Symmetry and topology in triplet superconductors." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627965.

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Abstract:
Ginzburg-Landau theory is the phenomenological theory through which phase transitions are understood. It is within this framework that the first insights into superconductivity were obtained. More recently superconductivity in systems with no inversion symmetry has become a topic of interest. In such systems lack of inversion symmetry is believed to allow singlet and triplet order parameters to be admixed although the pairing mechanism in some cases is unclear. This thesis us.es Ginzburg-Landau theory to analyse the materials LaNiC2l LaNiGa2l Li2(PdxPtl -xhB and Mo2AhC. In the case of centrosy
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