Relevant bibliographies by topics / Excitonic process

Contents

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

Academic literature on the topic 'Excitonic process'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Excitonic process.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Excitonic process"

1

Seiler, Hélène, Marcin Krynski, Daniela Zahn, Sebastian Hammer, Yoav William Windsor, Thomas Vasileiadis, Jens Pflaum, Ralph Ernstorfer, Mariana Rossi, and Heinrich Schwoerer. "Nuclear dynamics of singlet exciton fission in pentacene single crystals." Science Advances 7, no. 26 (June 2021): eabg0869. http://dx.doi.org/10.1126/sciadv.abg0869.

Full text
Abstract:
Singlet exciton fission (SEF) is a key process for developing efficient optoelectronic devices. An aspect rarely probed directly, yet with tremendous impact on SEF properties, is the nuclear structure and dynamics involved in this process. Here, we directly observe the nuclear dynamics accompanying the SEF process in single crystal pentacene using femtosecond electron diffraction. The data reveal coherent atomic motions at 1 THz, incoherent motions, and an anisotropic lattice distortion representing the polaronic character of the triplet excitons. Combining molecular dynamics simulations, time-dependent density-functional theory, and experimental structure factor analysis, the coherent motions are identified as collective sliding motions of the pentacene molecules along their long axis. Such motions modify the excitonic coupling between adjacent molecules. Our findings reveal that long-range motions play a decisive part in the electronic decoupling of the electronically correlated triplet pairs and shed light on why SEF occurs on ultrafast time scales.
APA, Harvard, Vancouver, ISO, and other styles
2

Sánchez, Fernando, Vicenta Sánchez, and Chumin Wang. "Coarse-Grained Quantum Theory of Organic Photovoltaic Devices." Nanomaterials 11, no. 2 (February 16, 2021): 495. http://dx.doi.org/10.3390/nano11020495.

Full text
Abstract:
Understanding the exciton dissociation process in organic solar cells is a fundamental issue for the design of high-performance photovoltaic devices. In this article, a parameterized quantum theory based on a coarse-grained tight-binding model plus non-local electron-hole interactions is presented, while the diffusion and recombination of excitons are studied in a square lattice of excitonic states, where a real-space renormalization method on effective chains has been used. The Hamiltonian parameters are determined by fitting the measured quantum efficiency spectra and the theoretical short-circuit currents without adjustable parameters show a good agreement with the experimental ones obtained from several polymer:fullerene and polymer:polymer heterojunctions. Moreover, the present study reveals the degree of polymerization and the true driving force at donor-acceptor interface in each analyzed organic photovoltaic device.
APA, Harvard, Vancouver, ISO, and other styles
3

VIELHAUER, S., M. KIRM, V. KISAND, E. NEGODIN, E. SOMBROWSKI, B. STEEG, and G. ZIMMERER. "EXCITONIC SIDE BANDS OF INNER-SHELL EXCITATIONS IN RARE GAS SOLIDS." Surface Review and Letters 09, no. 02 (April 2002): 1333–38. http://dx.doi.org/10.1142/s0218625x02003767.

Full text
Abstract:
Valence-exciton luminescence under inner-shell excitation of the rare gas solids Xe, Kr, and Ar has been measured using time-resolved photoluminescence. Two different processes for exciton creation can be distinguished: creation of "prompt" excitons immediately after excitation (within the experimental time resolution), and creation of "delayed" excitons through electron–hole recombination. The decay structure of the exciton emission in the range of inner-shell excitation is characterized by the coexistence of the two processes. Time-resolved excitation spectra near the 2p edge in Ar, the 3d edge in Kr, and the 4d edge in Xe are discussed. The process of prompt exciton creation is strongly enhanced above an excitation threshold at the energy position of the ionization limit of the core state plus the energy of the valence free exciton.
APA, Harvard, Vancouver, ISO, and other styles
4

TAKEDA, JUN, SUSUMU KURITA, YEFAN CHEN, and TAKAFUMI YAO. "ULTRAFAST CARRIER DYNAMICS IN ZnO EPITAXIAL THIN FILMS STUDIED BY OPTICAL KERR GATE LUMINESCENCE SPECTROSCOPY." International Journal of Modern Physics B 15, no. 28n30 (December 10, 2001): 3669–72. http://dx.doi.org/10.1142/s0217979201008391.

Full text
Abstract:
Time-resolved luminescence spectra of ZnO epitaxial thin films have been measured by the optical Kerr gate luminescence spectroscopy under resonant excitation of the excitonic state. At moderate excitation density, a luminescence band (P band) which is attributed to an exciton-exciton collision process was observed. With increasing the excitation density, the P band disappears while a new luminescence band (EHP band) due to radiative recombination of electrons with holes in an electron-hole plasma appears. The EHP band has a rise time of ~1 ps, and shifts to lower energy with time and then finally shifts to higher energy. The rise time of the EHP band shows a transition time from a high density excitonic state to an unbound electron-hole system due to the screening of Coulomb interaction. The red shift of the EHP band comes from the reduced band-gap effect, while the blue shift to the EHP band is mainly attributed to recovery of the renormalized band-gap, which occurs with decreasing the carrier density due to the radiative recombination of electrons with holes.
APA, Harvard, Vancouver, ISO, and other styles
5

Wilhelm, Philipp, Jakob Schedlbauer, Florian Hinderer, Daniel Hennen, Sigurd Höger, Jan Vogelsang, and John M. Lupton. "Molecular excitonic seesaws." Proceedings of the National Academy of Sciences 115, no. 16 (April 2, 2018): E3626—E3634. http://dx.doi.org/10.1073/pnas.1722229115.

Full text
Abstract:
The breaking of molecular symmetry through photoexcitation is a ubiquitous but rather elusive process, which, for example, controls the microscopic efficiency of light harvesting in molecular aggregates. A molecular excitation within a π-conjugated segment will self-localize due to strong coupling to molecular vibrations, locally changing bond alternation in a process which is fundamentally nondeterministic. Probing such symmetry breaking usually relies on polarization-resolved fluorescence, which is most powerful on the level of single molecules. Here, we explore symmetry breaking by designing a large, asymmetric acceptor–donor–acceptor (A1-D-A2) complex 10 nm in length, where excitation energy can flow from the donor, a π-conjugated oligomer, to either one of the two boron-dipyrromethene (bodipy) dye acceptors of different color. Fluorescence correlation spectroscopy (FCS) reveals a nondeterministic switching between the energy-transfer pathways from the oligomer to the two acceptor groups on the submillisecond timescale. We conclude that excitation energy transfer, and light harvesting in general, are fundamentally nondeterministic processes, which can be strongly perturbed by external stimuli. A simple demonstration of the relation between exciton localization within the extended π-system and energy transfer to the endcap is given by considering the selectivity of endcap emission through the polarization of the excitation light in triads with bent oligomer backbones. Bending leads to increased localization so that the molecule acquires bichromophoric characteristics in terms of its fluorescence photon statistics.
APA, Harvard, Vancouver, ISO, and other styles
6

El Kabbash, Mohamed, Alireza Rahimi Rashed, Kandammathe Valiyaveedu Sreekanth, Antonio De Luca, Melissa Infusino, and Giuseppe Strangi. "Plasmon-Exciton Resonant Energy Transfer: Across Scales Hybrid Systems." Journal of Nanomaterials 2016 (2016): 1–21. http://dx.doi.org/10.1155/2016/4819040.

Full text
Abstract:
The presence of an excitonic element in close proximity of a plasmonic nanostructure, under certain conditions, may lead to a nonradiative resonant energy transfer known as Exciton Plasmon Resonant Energy Transfer (EPRET) process. The exciton-plasmon coupling and dynamics have been intensely studied in the last decade; still many relevant aspects need more in-depth studies. Understanding such phenomenon is not only important from fundamental viewpoint, but also essential to unlock many promising applications. In this review we investigate the plasmon-exciton resonant energy transfer in different hybrid systems at the nano- and mesoscales, in order to gain further understanding of such processes across scales and pave the way towards active plasmonic devices.
APA, Harvard, Vancouver, ISO, and other styles
7

Guo, Bolin, Chao Luo, Cheng Yan, Bai Sun, Wen Li, and Weiqing Yang. "Understanding Excitonic Behavior in Light Absorption and Recombination Process." Journal of Physical Chemistry C 124, no. 47 (November 13, 2020): 26076–82. http://dx.doi.org/10.1021/acs.jpcc.0c09334.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ueno, Yoshihiro, Shiho Kishino, Hideyuki Kunugita, Kazuhiro Ema, Masahiro Rikukawa, Yuko Tabuchi, and Naoya Ogata. "Ultrafast Excitonic Nonlinearity in Regioregular Head-to-Tail Coupled Poly(3-Hexylthiophene)." Journal of Nonlinear Optical Physics & Materials 07, no. 01 (March 1998): 161–66. http://dx.doi.org/10.1142/s0218863598000132.

Full text
Abstract:
Third-order optical nonlinearity of regioregular head-to-tail coupled poly(3-hexylthiophene)(HT-PHT) was measured using degenerate four wave mixing (DFWM), and the dispersion spectrum of |χ(3)| around the exciton absorption peak was obtained. In addition, the relaxation process of the excitons was measured using the transient grating method. The resultant decay time was less than 2 ps and consisted of two components.
APA, Harvard, Vancouver, ISO, and other styles
9

Михайлов, Т. Н., Е. А. Европейцев, К. Г. Беляев, A. A. Торопов, A. В. Родина, A. A. Головатенко, С. В. Иванов, Г. Позина, and T. В. Шубина. "Ферстеровский резонансный перенос энергии с участием светлых и темных экситонов в массивах эпитаксиальных квантовых точек CdSe/ZnSe." Физика твердого тела 60, no. 8 (2018): 1575. http://dx.doi.org/10.21883/ftt.2018.08.46246.03gr.

Full text
Abstract:
AbstractUsing time-resolved photoluminescence (PL) spectroscopy, we establish the presence of the Förster energy transfer mechanism between two arrays of epitaxial CdSe/ZnSe quantum dots (QDs) of different sizes. The mechanism operates through dipole–dipole interaction between ground excitonic states of the smaller QDs and excited states of the larger QDs. The dependence of energy transfer efficiency on the width of barrier separating the QD insets is shown to be in line with the Förster mechanism. The temperature dependence of the PL decay times and PL intensity suggests the involvement of dark excitons in the energy transfer process.
APA, Harvard, Vancouver, ISO, and other styles
10

Thomas, P., M. M�ller, R. Eichmann, T. Meier, T. Stroucken, and A. Knorr. "Microscopic Foundation of the F�rster Excitonic Energy Transfer Process." physica status solidi (b) 230, no. 1 (March 2002): 25–29. http://dx.doi.org/10.1002/1521-3951(200203)230:1<25::aid-pssb25>3.0.co;2-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Excitonic process"

1

Piccioli, Norbert. "Constantes optiques du seleniure de gallium : variation avec la temperature et bistabilite optique induite par effet thermique." Paris 6, 1987. http://www.theses.fr/1987PA066196.

Full text
Abstract:
Verification du modele d'elliot pour le cas d'une transition directe avec interaction electron-trou. Le modele a ete modifie pour tenir compte de l'anisotropie et de l'interaction avec les vibrations du reseau. L'analyse, effectuee entre 2 et 500 k, a permis de suivre l'evolution des parametres excitoniques et de la structure de bande avec la temperature. La forme des raies excitoniques avec lorentzienne asymetrique a ete predite. A partir de la, la nature de l'exciton direct et de l'interaction exciton-phonon ont pu etre deduites
APA, Harvard, Vancouver, ISO, and other styles
2

Jadhav, Priyadarshani. "Singlet exciton fission, a multi-exciton generation process, in organic semiconductor solar cells." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/75635.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 107-115).
Organic semiconductor photovoltaics hold the promise of cheap production and low manufacturing setup costs. The highest efficiency seen in research labs, ~10% today, is still too low for production. In this work we explore implementations of a multiple exciton generation process, singlet exciton fission, to work around the Shockley-Queisser limit, according to which, all single junctions cells have a theoretical efficiency limit of 33.7%. This is the first implementation of a singlet fission photovoltaic. We measured a singlet fission efficiency of 72% at room temperature. We showed that singlet fission can be implemented in bulk heterojunction photovoltaics, which is an important result since some of the highest efficiency organic photovoltaics in the last 5 years have been bulk heterojunction structures. Secondly, we showed that the magnetic field effect can be used as a probe to investigate triplet dissociation in singlet fission devices. Thirdly, we implemented singlet fission photovoltaics, using the singlet fission material pentacene as donor and low bandgap infrared-absorptive lead chalcogenide quantum dots as acceptors. Singlet fission can enhance the efficiency of organic photovoltaics only if the fission material is paired with an absorptive low-energy-gap material. We find that pentacene triplet excitons dissociate at the pentacene/quantum dot heterojunctions with an internal quantum efficiency of 35%. Lastly, we investigate a series of materials to find a better acceptor in singlet fission photovoltaics using the methods and some results from the previous two investigations. We investigate device structures that pair pentacene and 6,13 diphenyl-pentacene as singlet fission donors with C60 , perylene diimides, PbS quantum dots and PbSe quantum dots as acceptors.
by Priyadarshani Jadhav.
Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
3

Gonzalez, Gomez Jesus Antonio. "Transitions optiques dans gaas sous haute pression : application a la transition de phase cubiques-orthorhombique." Paris 6, 1988. http://www.theses.fr/1988PA066264.

Full text
Abstract:
Mesure du coefficient d'absorption a 300 k et pour des pressions jusqu'a 13 gpa et comparaison avec les modeles d'elliott-toyozawa a basse pression et de dumke a haute pression. Les variations avec la pression, des bandes interdites directes et indirectes est deduite. Au dela des 13 gpa l'etude de la transition de phase structure blende-orthorhombique a permis d'etablir le domaine de stabilite de la phase blende. L'etude de la photo conductivite sous pression a permis l'estimation de la longueur de diffusion et de la duree de vie des porteurs photo excites
APA, Harvard, Vancouver, ISO, and other styles
4

Oddos-Marcel, Lionel. "Etude des états électroniques et de la dynamique de relaxation d'un dimère de phtalocyanine de silicium." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10121.

Full text
Abstract:
Les etats excites et la dynamique de relaxation des monomeres et dimeres de tetra-(methoxy)-tetra-(octyloxy)-silicon-phthalocyanine ont ete etudies en solution dans le toluene et le thf par spectroscopie statique et spectroscopie resolue dans le temps. L'agregation des monomeres et dimeres, caracterisee par une large absorption a plus basse energie que la bande q, apparait a des concentrations aussi faibles que 10#-#7 m dans le toluene, alors qu'elle n'est detectee qu'au dessus de 10#-#4 m dans le thf. Contrairement au monomere qui fluoresce fortement (rendement quantique de fluorescence de 0. 65), la fluorescence du dimere est decalee de 4000 cm#-#1 vers les basses energies et le rendement quantique de fluorescence est diminue d'un facteur 10#-#3. Les spectres d'absorption et de fluorescence du dimere, interpretes par le modele du dimere dans la limite du couplage fort, donnent pour terme de couplage excitonique 1640 cm#-#1. Les predictions faites dans le cadre de ce modele d'une relaxation tres rapide jusqu'a l'etat excitonique de plus basse energie ainsi que d'une duree de vie de 10 ps pour cet etat sont verifiees par des mesures de type pompe-sonde. Les modifications prononcees du spectre d'adsorption du dimere en fonction du solvant sont expliquees par la contribution de configurations de paires d'ions aux etats electroniques. Cette contribution est plus importante pour les etats excites et justifie la forte augmentation de la constante de conversion intersysteme du monomere ( 10#7 s#-#1) au dimere ( 10#1#1 s#-#1). Alors que la relaxation du premier etat excite singulet du monomere est dominee par une decroissance radiative jusqu'a l'etat fondamental en un temps caracteristique de 4. 5 ns, le dimere relaxe vers l'etat triplet qui a une duree de vie d'une centaine de picosecondes. Dans le thf, un second etat a longue duree de vie est detecte. Cet etat correspond peut etre a un etat a transfert de charge, stabilise par une modification de la geometrie de la molecule et un rearrangement du solvant.
APA, Harvard, Vancouver, ISO, and other styles
5

Vilela, Raquel Riciati do Couto. "Caracterização óptica de nanopartículas de CuCl e CuBr sintetizadas em filmes ORMOSILs /." Rio Claro, 2017. http://hdl.handle.net/11449/150614.

Full text
Abstract:
Orientador: Dario Antonio Donatti
Banca: Fábio Simões de Vicente
Banca: Ivan de Oliveira
Resumo: A incorporação de nanopartículas em matrizes híbridas produz materiais com grande potencial para aplicações em diversas áreas de estudo. Na óptica, sua funcionalidade surge quando elétrons confinados em estruturas tridimensionais nanométricas são excitados. Em princípio, esses materiais exibem nível de energia discreto, apresentando picos estreitos no espectro de absorção. Tal comportamento torna-os atrativos para óptica não-linear e aplicações eletro-ópticas. Neste trabalho, o processo sol-gel foi utilizado para a síntese de nanocompósitos contendo CuCl ou CuBr. Cu2O, HBr e HCl foram utilizados como precursores para os CuBr e CuCl, e a matriz Orgânica/Sílica foi preparada a partir dos alcóxidos 3-glicidoxipropiltrimetoxisilano (GPTS) e Tetraetilortosilicato (TEOS). As amostras foram preparadas na forma de filmes finos depositados sobre lâminas de vidro, utilizando a técnica Dip-Coating. Após a secagem, as amostras foram tratadas num forno convencional e/ou expostas à radiação UV utilizando uma luz negra comercial. A espectroscopia de absorção UV-VIS permitiu identificar estreitas bandas de absorção, bem como sua variação. O espectro de absorção (UV-VIS) registrou à temperatura ambiente picos em 418 e 399 nm para as nanopartículas de CuBr e a 376 e 380 nm para as nanopartículas CuCl, correspondente aos excitons Z1,2 e Z3 respectivamente. Comportamento semelhante foi relatado na literatura
Abstract: The incorporation of nanoparticles in hybrid matrices has produced materials with great potential for applications in many fields of study. In optics, its functionality arises when electrons confined in nanometric three-dimensional structures are excited. At first, these materials exhibit discrete energy level, with sharp peaks in the absorption spectrum. Such behavior makes them attractive to non-linear optical and electro-optical applications. In this work, the sol-gel process was used for the synthesis of nanocomposite containing CuCl or CuBr. These complexes decompose during thermal or ultraviolet treatment, and form copper halide nanoparticles. Cu2O, HCl and HBr were used as precursors for the CuBr and CuCl, and the organic matrix/silica was prepared from alkoxides of 3-glycidoxypropyltrimethoxysilane (GPTS) and tetraethylorthosilicate (TEOS). The samples were made in the form of thin films deposited on glass slides using the dip-coating technique. After drying, they were treated in a conventional oven and/or exposed to UV radiation using a commercial black light. The UV-VIS absorption spectrum allowed to identify narrow absorption bands, such as its variation. The absorption spectrum (UV-Vis) recorded at room temperature showed peaks at 418 and 399 nm CuBr nanoparticles and 376 and 380 to CuCl nanoparticles corresponding to the excitons Z1,2 and Z3 respectively. Similar behavior has been reported in the literature
Mestre
APA, Harvard, Vancouver, ISO, and other styles
6

Gosso, Jean-Pierre. "Spectroscopie Raman des excitations magnétiques dans les fluorures antiferromagnétiques cobalteux purs ou desordonnés par substitution." Paris 13, 1986. http://www.theses.fr/1986PA132007.

Full text
Abstract:
Description des excitations magnétiques dans k::(2) cof::(4) et rb::(2) cof::(4) par un modèle multi-excitonique construit sur un hamiltonien comprenant champ cristallin, couplage spin-orbite et échange de heisenberg opérant sur le multiplet fondamental de l'ion cobalt en champ cristallin cubique. L'interprétation pour les composés désordonnés par substitution d'un ion magnétique mn se fait par fonctions de green ou modèle de champ moléculaire
APA, Harvard, Vancouver, ISO, and other styles
7

MANAR, ABDELKRIM. "Dynamique des proprietes optiques nonlineaires du chlorure de cuivre au voisinage des resonances electroniques." Université Louis Pasteur (Strasbourg) (1971-2008), 1989. http://www.theses.fr/1989STR13054.

Full text
Abstract:
L'etude des populations des quasiparticules (excitons, polaritons, etc. ), des durees de vie de leurs etats fondamentals et excites est faite par mesures de transmission induite et de gain a l'aide d'une technique "pompe et sonde". L'elargissement asymetrique de la raie d'absorption excitonique est explique par les collisions elastiques entre excitons. Les variations de l'indice de refraction sont expliquees par la dynamique des polaritons de type photonique
APA, Harvard, Vancouver, ISO, and other styles
8

Andraud, Chantal. "Defauts d'empilement dans le materiau unidimensionnel cscdbr::(3) : etude spectroscopique." Paris 6, 1987. http://www.theses.fr/1987PA066140.

Full text
Abstract:
L'etude des proprietes optiques de cscdbr::(3) a montre l'existence de centres br::(2)**(2-). L'excitation des echantillons par des rayonnements ionisants (rx, faisceau d'electrons) et des experiences d'absorption a deux photons ont permis d'associer les differentes bandes d'emission et d'absorption observees a des transitions appartenant a ces centres. L'existence de ces centres br::(2)**(2-) est attribuee a la presence de defauts d'empilement. L'effet d'une pression hydrostatique, le dopage par des ions pb**(2x) et le recuit des cristaux confirment l'hypothese
APA, Harvard, Vancouver, ISO, and other styles
9

Chomette, André. "Proprietes electroniques et optiques des superreseaux gaas/gaalas de petites periodes." Paris 6, 1988. http://www.theses.fr/1988PA066146.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Dostál, Jakub. "Studie fotosyntetického aparátu zelených sirných bakterií metodou koherentní dvourozměrné elektronové spektroskopie." Doctoral thesis, 2014. http://www.nusl.cz/ntk/nusl-342359.

Full text
Abstract:
The process of photosynthesis begins with a capture of sunlight and its quick conversion into the chemical energy. Both these primary processes take place in a specially designed photosynthetic apparatus that is present in cells of all photosynthetic organisms. In green sulfur bacteria the apparatus consists of a massive light-harvesting antenna (chlorosome), intermediate antennas (baseplate complex and FMO proteins) and of the reaction center, where the conversion into the chemical energy occurs. The energy flow through the apparatus can be monitored by time-resolved spectroscopy techniques. Coherent two-dimensional electronic spectroscopy (2DES) in one of such techniques, which combines high temporal and spectral resolution, and therefore it is especially well suited for studying multichromophoric systems such as photosynthetic apparatus. This thesis describes the principles of the 2DES technique and outlines the basic facts about the photosynthetic apparatus of green sulfur bacterium Chlorobaculum tepidum. Finally, it summarizes the investigation of the photosynthetic machinery using 2DES. Results presented in this thesis provide new insights into the exciton diffusion and vibrational coherences within chlorosomes, excitonic structure of the baseplate and the overall energy flow through the entire...
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Excitonic process"

1

Saito, R., A. Jorio, J. Jiang, K. Sasaki, G. Dresselhaus, and M. S. Dresselhaus. Optical properties of carbon nanotubes and nanographene. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533053.013.1.

Full text
Abstract:
This article examines the optical properties of single-wall carbon nanotubes (SWNTs) and nanographene. It begins with an overview of the shape of graphene and nanotubes, along wit the use of Raman spectroscopy to study the structure and exciton physics of SWNTs. It then considers the basic definition of a carbon nanotube and graphene, focusing on the crystal structure of graphene and the electronic structure of SWNTs, before describing the experimental setup for confocal resonance Raman spectroscopy. It also discusses the process of resonance Raman scattering, double-resonance Raman scattering, and the Raman signals of a SWNT as well as the dispersion behavior of second-order Raman modes, the doping effect on the Kohn anomaly of phonons, and the elastic scattering of electrons and photons. The article concludes with an analysis of excitons in SWNTs and outlines future directions for research.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Excitonic process"

1

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "The Exciton and Excitonic Molecule in Cuprous Halides." In Excitonic Processes in Solids, 116–202. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Introduction." In Excitonic Processes in Solids, 1–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Theoretical Aspects of Excitonic Molecules." In Excitonic Processes in Solids, 20–115. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Theory of Excitons in Phonon Fields." In Excitonic Processes in Solids, 203–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Excitons in Condensed Rare Gases." In Excitonic Processes in Solids, 285–308. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Exciton-Phonon Processes in Silver Halides." In Excitonic Processes in Solids, 309–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Excitons and Their Interactions with Phonons and External Fields in Thallous Halides." In Excitonic Processes in Solids, 370–436. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Photocarrier Motion in Ionic Crystals." In Excitonic Processes in Solids, 437–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Ueta, Masayasu, Hiroshi Kanzaki, Koichi Kobayashi, Yutaka Toyozawa, and Eiichi Hanamura. "Excitons and Phonon Couplings in Quasi-One-Dimensional Crystals." In Excitonic Processes in Solids, 475–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82602-3_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Singh, Jai. "Polarons and Excitonic Polarons." In Excitation Energy Transfer Processes in Condensed Matter, 69–110. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-0996-1_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Excitonic process"

1

Yamamoto, Hajime, and Hidetsugu Matsukiyo. "Nonradiative recombination process in Y2O2S:Eu3+ phosphors." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200994.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Chen, T., A. Vierheilig, P. Waltner, W. Kiefer, and A. Materny. "The Relaxation Process of Polydiacetylene in Its Excitonic States Studied by Time- and Frequency-Resolved Femtosecond CARS Spectroscopy." In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2000. http://dx.doi.org/10.1364/up.2000.tha5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Matsui, Atsuo H. "Excitonic processes in aromatic molecular crystals of strong exciton-phonon coupling." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200968.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Li, Jinwei, and Yong Shi. "Electron Transport and Recombination in TiO2 Nanofiber Dye Sensitized Solar Cell." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64979.

Full text
Abstract:
Dye sensitized solar cells (DSSCs), a new type of photo-electrochemical solar cells, are a promising alternative to the silicon based photovoltaic because they hold advantages of low cost, simple manufacturing processes and higher conversion efficiency compared with other types of excitonic solar cell. DSSCs with conversion efficiencies of up to 11% have been achieved with a highly stable electrolyte under AM1.5G conditions. Recently, one dimensional (1D) electrospun TiO2 nanofibers have been used as the DSSC photoanode to improve the electron transport efficiency and enhance the light harvest efficiency by scattering more light in the red part of the solar spectrum. In this paper, stepped light induced transient measurement of photocurrent and voltage (SLIM-PCV) has been employed to study electron transport and recombination in DSSCs. Electron diffusion coefficients and electron lifetimes were measured with differing light intensities. The electron diffusion coefficients and electron lifetimes strong correlate with intensity, which indicates the trap limited diffusion process for electrons in the TiO2 nanofiber DSSC.
APA, Harvard, Vancouver, ISO, and other styles
5

Craig, D. P. "Excon '94 opening remarks." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200937.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Rashba, Emmanuel I. "Excitons in incompressible quantum liquids." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200938.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Sumi, Hitoshi. "Peculiarities in exciton-polaron formation and self-trapping in low dimensions." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200939.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Chtanov, A., Michael Gal, and P. Eyland. "Electromodulation of excitons in quantum wells measured by photoluminescence." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200940.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Seisyan, Ruben P., Alexey V. Kavokin, S. I. Kokhanovskii, A. I. Nesvizhskii, M. E. Sasin, and Victor M. Ustinov. "Exciton structure of absorption and magneto-absorption spectra near type I-type II transition in the strained heterostructures." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200941.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Mysyrowicz, Andre, Emery Fortin, and Eric Benson. "Study of excitonic superfluidity in Cu2O." In Excitonic Processes in Condensed Matter: International Conference, edited by Jai Singh. SPIE, 1995. http://dx.doi.org/10.1117/12.200942.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Excitonic process"

1

Wong, Bryan Matthew. Radiation effects from first principles : the role of excitons in electronic-excited processes. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/972894.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Excitonic process' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography