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Добірка наукової літератури з теми "Singlet exciton fission"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Singlet exciton fission"

1

Neef, Alexander, Samuel Beaulieu, Sebastian Hammer, Shuo Dong, Julian Maklar, Tommaso Pincelli, R. Patrick Xian, et al. "Orbital-resolved observation of singlet fission." Nature 616, no. 7956 (April 12, 2023): 275–79. http://dx.doi.org/10.1038/s41586-023-05814-1.

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Анотація:
AbstractSinglet fission1–13 may boost photovoltaic efficiency14–16 by transforming a singlet exciton into two triplet excitons and thereby doubling the number of excited charge carriers. The primary step of singlet fission is the ultrafast creation of the correlated triplet pair17. Whereas several mechanisms have been proposed to explain this step, none has emerged as a consensus. The challenge lies in tracking the transient excitonic states. Here we use time- and angle-resolved photoemission spectroscopy to observe the primary step of singlet fission in crystalline pentacene. Our results indicate a charge-transfer mediated mechanism with a hybridization of Frenkel and charge-transfer states in the lowest bright singlet exciton. We gained intimate knowledge about the localization and the orbital character of the exciton wave functions recorded in momentum maps. This allowed us to directly compare the localization of singlet and bitriplet excitons and decompose energetically overlapping states on the basis of their orbital character. Orbital- and localization-resolved many-body dynamics promise deep insights into the mechanics governing molecular systems18–20 and topological materials21–23.
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2

Stern, Hannah L., Andrew J. Musser, Simon Gelinas, Patrick Parkinson, Laura M. Herz, Matthew J. Bruzek, John Anthony, Richard H. Friend, and Brian J. Walker. "Identification of a triplet pair intermediate in singlet exciton fission in solution." Proceedings of the National Academy of Sciences 112, no. 25 (June 9, 2015): 7656–61. http://dx.doi.org/10.1073/pnas.1503471112.

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Анотація:
Singlet exciton fission is the spin-conserving transformation of one spin-singlet exciton into two spin-triplet excitons. This exciton multiplication mechanism offers an attractive route to solar cells that circumvent the single-junction Shockley–Queisser limit. Most theoretical descriptions of singlet fission invoke an intermediate state of a pair of spin-triplet excitons coupled into an overall spin-singlet configuration, but such a state has never been optically observed. In solution, we show that the dynamics of fission are diffusion limited and enable the isolation of an intermediate species. In concentrated solutions of bis(triisopropylsilylethynyl)[TIPS]—tetracene we find rapid (<100 ps) formation of excimers and a slower (∼10 ns) break up of the excimer to two triplet exciton-bearing free molecules. These excimers are spectroscopically distinct from singlet and triplet excitons, yet possess both singlet and triplet characteristics, enabling identification as a triplet pair state. We find that this triplet pair state is significantly stabilized relative to free triplet excitons, and that it plays a critical role in the efficient endothermic singlet fission process.
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3

Uchida, Kazuyuki, Takashi Kubo, Daiki Yamanaka, Akihiro Furube, Hiroyuki Matsuzaki, Ritsuki Nishii, Yusuke Sakagami, Aizitiaili Abulikemu, and Kenji Kamada. "Synthesis, crystal structure, and photophysical properties of 2,9-disubstituted peropyrene derivatives." Canadian Journal of Chemistry 95, no. 4 (April 2017): 432–44. http://dx.doi.org/10.1139/cjc-2016-0569.

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Peropyrene is a promising candidate molecule for use in organic solar cells based on singlet fission, because it fulfills the energy matching requirement for singlet fission. We prepare three 2,9-disubstitued peropyrene derivatives and investigate their crystal structures, photophysical properties, and singlet fission phenomenon. Although each derivative shows different molecular overlap motifs in solid state, no singlet fission occurs under normal exciton density conditions due to the substantial stabilization of the first excited singlet (S1) state. In contrast, under high exciton density conditions, singlet fission from highly excited singlet (Sn) states, which is generated by singlet–singlet exciton annihilation, takes place to produce a triplet exciton. We also investigate the reverse process of singlet fission, that is, triplet–triplet annihilation, of peropyrene in solution state to explore the possibility of photon upconversion.
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4

Duan, Hong-Guang, Ajay Jha, Xin Li, Vandana Tiwari, Hanyang Ye, Pabitra K. Nayak, Xiao-Lei Zhu, et al. "Intermolecular vibrations mediate ultrafast singlet fission." Science Advances 6, no. 38 (September 2020): eabb0052. http://dx.doi.org/10.1126/sciadv.abb0052.

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Анотація:
Singlet fission is a spin-allowed exciton multiplication process in organic semiconductors that converts one spin-singlet exciton to two triplet excitons. It offers the potential to enhance solar energy conversion by circumventing the Shockley-Queisser limit on efficiency. We study the primary steps of singlet fission in a pentacene film by using a combination of TG and 2D electronic spectroscopy complemented by quantum chemical and nonadiabatic dynamics calculations. We show that the coherent vibrational dynamics induces the ultrafast transition from the singlet excited electronic state to the triplet-pair state via a degeneracy of potential energy surfaces, i.e., a multidimensional conical intersection. Significant vibronic coupling of the electronic wave packet to a few key intermolecular rocking modes in the low-frequency region connect the excited singlet and triplet-pair states. Along with high-frequency local vibrations acting as tuning modes, they open a new channel for the ultrafast exciton transfer through the resulting conical intersection.
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5

Lee, Jiye, Priya Jadhav, Philip D. Reusswig, Shane R. Yost, Nicholas J. Thompson, Daniel N. Congreve, Eric Hontz, Troy Van Voorhis, and Marc A. Baldo. "Singlet Exciton Fission Photovoltaics." Accounts of Chemical Research 46, no. 6 (April 23, 2013): 1300–1311. http://dx.doi.org/10.1021/ar300288e.

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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.

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Анотація:
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.
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Baldacchino, Alexander J., Miles I. Collins, Michael P. Nielsen, Timothy W. Schmidt, Dane R. McCamey, and Murad J. Y. Tayebjee. "Singlet fission photovoltaics: Progress and promising pathways." Chemical Physics Reviews 3, no. 2 (June 2022): 021304. http://dx.doi.org/10.1063/5.0080250.

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Анотація:
Singlet fission is a form of multiple exciton generation, which occurs in organic chromophores when a high-energy singlet exciton separates into two lower energy triplet excitons, each with approximately half the singlet energy. Since this process is spin-allowed, it can proceed on an ultrafast timescale of less than several picoseconds, outcompeting most other loss mechanisms and reaching quantitative yields approaching 200%. Due to this high quantum efficiency, the singlet fission process shows promise as a means of reducing thermalization losses in photovoltaic cells. This would potentially allow for efficiency improvements beyond the thermodynamic limit in a single junction cell. Efforts to incorporate this process into solar photovoltaic cells have spanned a wide range of device structures over the past decade. In this review, we compare and categorize these attempts in order to assess the state of the field and identify the most promising avenues of future research and development.
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Walker, Brian J., Andrew J. Musser, David Beljonne, and Richard H. Friend. "Singlet exciton fission in solution." Nature Chemistry 5, no. 12 (November 17, 2013): 1019–24. http://dx.doi.org/10.1038/nchem.1801.

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Snamina, Mateusz, and Piotr Petelenz. "Dopant-Catalyzed Singlet Exciton Fission." ChemPhysChem 18, no. 1 (December 2, 2016): 149–55. http://dx.doi.org/10.1002/cphc.201600885.

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Llansola-Portoles, M. J., K. Redeckas, S. Streckaité, C. Ilioaia, A. A. Pascal, A. Telfer, M. Vengris, L. Valkunas, and B. Robert. "Lycopene crystalloids exhibit singlet exciton fission in tomatoes." Physical Chemistry Chemical Physics 20, no. 13 (2018): 8640–46. http://dx.doi.org/10.1039/c7cp08460a.

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Transient absorption studies conducted on in vitro lycopene aggregates, as well as on lycopene crystalloids inside tomato chromoplasts, reveal the appearance of a long-lived excited state, which we unambiguously identified as lycopene triplet generated by singlet exciton fission.
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Більше джерел

Дисертації з теми "Singlet exciton fission"

1

Musser, Andrew. "Singlet exciton fission in unconventional systems." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648614.

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2

Thompson, Nicholas John. "Singlet exciton fission : applications to solar energy harvesting." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89959.

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Анотація:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 141-147).
Singlet exciton fission transforms a single molecular excited state into two excited states of half the energy. When used in solar cells it can double the photocurrent from high energy photons increasing the maximum theoretical power efficiency to greater than 40%. The steady state singlet fission rate can be perturbed under an external magnetic field. I utilize this effect to monitor the yield of singlet fission within operating solar cells. Singlet fission approaches unity efficiency in the organic semiconductor pentacene for layers more than 5 nm thick. Using organic solar cells as a model system for extracting photocurrent from singlet fission, I exceed the convention limit of 1 electron per photon, realizing 1.26 electrons per incident photon. One device architecture proposed for high power efficiency singlet fission solar cells coats a conventional inorganic semiconducting solar with a singlet fission molecule. This design requires energy transfer from the non-emissive triplet exciton to the semiconducting material, a process which has not been demonstrated. I prove that colloidal nanocrystals accept triplet excitons from the singlet fission molecule tetracene. This enables future devices where the combine singlet fission material and nanocrystal system energy transfer triplet excitons produced by singlet fission to a silicon solar cell.
by Nicholas J. Thompson.
Ph. D.
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3

Lukman, Steven. "Singlet exciton fission in acene dimer and diradicaloid molecules." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267735.

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This dissertation describes our study of a photophysical process that leads to ultrafast generation of triplet excitons following photoexcitation, singlet exciton fission, in three different acene dimers and diradicaloids. In pentacene and tetracene dimers, we investigate their mechanism of singlet fission. In a series of diradicaloids, we study the relation between molecular structure, diradical character and the suitability for singlet fission. In the first two chapters we explore singlet fission in pentacene dimer. We demonstrate fast and highly efficient intramolecular singlet fission, consisting of two covalently attached pentacene units. The singlet fission pathway is governed by the energy gap between singlet and charge-transfer states, which change dynamically with molecular geometry but are primarily set by the side group. The process exhibits a sensitivity to solvent polarity and competes with geometric relaxation in the singlet state, while subsequent triplet decay is strongly dependent on conformational freedom. The near orthogonal arrangement of the pentacene units is unlike any structure currently proposed for efficient singlet fission and points toward new molecular design rules. Furthermore, these results are the first to demonstrate the role of charge-transfer states in singlet fission and highlight the importance of solubilising groups to optimise excited-state photophysics. In the next chapter, we examine singlet fission in tetracene dimer, where singlet fission is energetically unfavourable. We demonstrate triplet yield as high as 190% can be achieved via fission from higher singlet excited states mediated by charge-transfer states. The outcomes of this study provide deeper insight into the role of hot singlet states in singlet fission and point toward less stringent molecular design rules. In the last chapter, we shift our focus on a new class of molecules, diradicaloid molecules. We explore a family of zethrene molecules, with tuneable diradical character, and demonstrate their general ability to undergo rapid singlet fission via spin-entangled and emissive triplet-pair state TT. A wide range of zethrene molecules are found to be suitable for singlet fission, with additional benefits of high absorption coefficients and photo-/chemical stability.
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4

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.

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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.
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COSTANTINI, ROBERTO. "Exciton Dynamics in Molecular Heterojunctions." Doctoral thesis, Università degli Studi di Trieste, 2020. http://hdl.handle.net/11368/2967981.

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Negli ultimi anni, la necessità di uno sviluppo economico più sostenibile ha contribuito ad aumentare l’interesse verso le fonti di energia rinnovabili. Con tendenze incoraggianti nell’efficienza di conversione e nei costi di produzione, si prevede che il fotovoltaico avrà un ruolo cruciale per la produzione di energia verde in futuro. Il silicio è attualmente la tecnologia dominante nel fotovoltaico ma, nel passato decennio, soluzioni innovative basate sui semiconduttori organici sono diventate interessanti per la possibilità di oltrepassare il limite di Shockley-Queisser e di offrire efficienze impareggiabili sfruttando la fissione del singoletto. Quest’ultimo è un processo di moltiplicazione eccitonica in cui, per una certa classe di materiali, un eccitone di singoletto si separa in due eccitoni di tripletto, si raddoppiando potenzialmente i portatori di carica. È necessario ancora molto lavoro per beneficiare pienamente della fissione del singoletto nel fotovoltaico; in particolare, è richiesto un maggior grado di controllo sul trasporto e sui meccanismi di dissociazione degli eccitoni alle interfaccie etero-organiche per poter estrarre efficacemente gli eccitoni di tripletto. Allo scopo di comprendere più a fondo tali processi, nella camera ANCHOR-SUNDYN della linea di luce ALOISA ad Elettra abbiamo sviluppato un apparato sperimentale per misure di spettroscopia ai raggi X risolte in tempo, in cui le dinamiche eccitoniche nei film organici possono essere caratterizzate usando spettroscopie di fotoemissione e di assorbimento di raggi X con una risoluzione di 100ps. Qui, possiamo combinare le misure risolte in tempo con spettroscopie a raggi X e UV tradizionali, per una più dettagliata analisi dei campioni. Abbiamo applicato questo approccio ad interfacce donore/accettore, sistemi prototipo per i dispositivi fotovoltaici organici; abbiamo studiato gli stati eccitati di tripletto nel pentacene mediante misure di assorbimento di raggi X risolte in tempo, con cui è stato individuato un picco legato all’eccitazione con una vita media di 0.3±0.2 ns sotto alla risonanza del LUMO, che abbiamo associato alle molecole nello stato di tripletto. Nella scala dei picosecondi, misure svolte al laser ad elettroni liberi FLASH rivelano una risposta dei fotoelettroni che riteniamo legata alla dissociazione dell’eccitone di tripletto all’interfaccia con lo strato di C60 sottostante. Abbiamo osservato un effetto analogo anche in spettri di fotoemissione pompa-sonda su interfacce di tetracene / ftalocianina di rame. Su questo sistema, abbiamo variato la lunghezza d’onda del fotone di pompa per eccitare selettivamente i due materiali, ed abbiamo esaminato il diverso comportamento degli eccitoni fotogenerati; la presenza di un campo elettrico transiente nella scala dei microsecondi suggerisce che gli eccitoni di tripletto sono coinvolti nel trasferimento di carica che avviene dal tetracene alla ftalocianina di rame, in accordo con studi precedenti. I risultati qui presentati dimostrano che le spettroscopie a raggi X risolte in tempo possono fornire informazioni valide per la caratterizzazione delle dinamiche eccitoniche in interfacce etero-organiche.
In recent years, the need for a more sustainable economic development contributed to the increasing interest in renewable energy sources. With encouraging trends on power conversion efficiencies and manufacturing costs, photovoltaics is expected to be the workhorse for the production of green energy in the future. Silicon is currently the dominant photovoltaic technology but, in the past decade, novel solutions based on organic semiconductors became attractive for their potential of overcoming the Shockley-Queisser limit and offering unmatched efficiencies by exploiting singlet fission. The latter is an exciton multiplication process in which, for a certain class of materials, a singlet exciton splits into two triplet excitons, thus potentially doubling the charge carriers. Significant work is still necessary to fully benefit of singlet fission in photovoltaics; in particular, a higher degree of control over exciton transport and dissociation mechanisms at hetero-organic interfaces is required for efficiently harvesting triplet excitons. To the aim of better understanding such processes, at the ANCHOR-SUNDYN endstation of the ALOISA beamline at Elettra we developed an experimental setup for time-resolved X-ray spectroscopies, in which the exciton dynamics in organic films can be characterized by X-ray photoemission and absorption spectroscopies with a 100 ps resolution. Here, we can combine time-resolved measurements with standard X-ray and UV spectroscopies for a more detailed analysis of the samples. We apply this approach to donor/acceptor interfaces, the prototypical architectures of organic photovoltaic devices; we investigate triplet excited states in pentacene by means of time-resolved X-ray absorption, which displays a pump-induced feature with a 0.3±0.2 ns lifetime below the LUMO resonance, that we associated to molecules in the triplet state. On the picosecond time scale, measurements performed at the FLASH free-electron laser reveal a photoelectron response that we deem related to the triplet exciton dissociation at the interface with the underlying C60 film. A similar effect is also observed in pump-probe photoemission spectra of tetracene / copper phthalocyanine interfaces. On this second system, we tuned the pump wavelength to selectively excite the two materials and examined the different behavior of the photogenerated excitons; the presence of a transient field in the microsecond time scale suggests that triplet excitons are involved in the charge transfer that occurs from tetracene to copper phthalocyanine, in agreement with previous studies. The results presented here demonstrate that time-resolved X-ray spectroscopies can provide valuable information for the characterization of exciton dynamics in hetero-organic interfaces.
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Liebhaber, Martin Lutz [Verfasser]. "Silicon heterojunction solar cells: From conventional concepts to a singlet fission multi-exciton generating hybrid approach / Martin Lutz Liebhaber." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1129174549/34.

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7

Morrison, Adrian Franklin. "An Efficient Method for Computing Excited State Properties of Extended Molecular Aggregates Based on an Ab-Initio Exciton Model." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1509730158943602.

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8

Weiss, Leah Rachel. "Spin-sensitive probes of triplet excitons in organic semiconductors." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/286356.

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Spin interactions play a key role in the function of molecular materials from naturally occurring biological complexes to synthetic materials for light-harvesting and light-emission. This thesis investigates the spin interactions of spin-1 triplet excitons formed by singlet fission. Singlet fission produces two triplet excitons from one light-induced singlet state and holds promise to enable solar energy generation beyond traditional efficiency limits. As the lifetime of triplet pairs depends sensitively on their spin degree of freedom, in this thesis we deploy spin-sensitive techniques to understand the interactions and evolution of triplet pairs. After introducing the relevant theoretical and experimental background underlying singlet fission and the role of spin, we describe the first observation of strongly exchange coupled, high-spin triplet-pair states ($S=2$) in a solid-state organic semiconductor and show that the singlet fission process allows for the formation of long-lived, strongly coupled spin-two states. We then describe the development and use of photoluminescence-detected avoided level-crossings in applied magnetic fields to quantify the strength of exchange coupling and identify specific optical signatures of exchange-coupled triplet pairs. Using high magnetic fields ($\leq\mbox{60 T}$) we isolate and measure the exchange coupling and optical signatures of multiple distinct triplet pairs in the same material. Finally, we probe the mechanisms of formation and decay of spin polarization from triplet pair states using pulsed spin resonance. The measured dynamics are consistent with polarization driven by fluctuations in exchange coupling between pairs and spin-orbit mediated decay of triplet excitons to the ground state. The combined measurements of the spin parameters and polarization dynamics of triplet pairs from ns to ms timescales provides a quantitative picture of the spin states generated by singlet fission.
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9

Hamid, Tasnuva. "Interplay of singlet and triplet Excitons in organic semiconductor Heterojunctions." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208018/1/Tasnuva_Hamid_Thesis.pdf.

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This thesis is a step towards exploiting singlet and triplet excitons in organic semiconductors for multi-functional diodes. It details the device design and fabrication processes for realisation of reversible organic optoelectronic diodes that can sense as well as emit light on demand. It explores new avenues for multi-exciton harvesting and triplet energy transfer in organic semiconductors in conjunction with physical mechanisms of singlet fission and triplet-triplet annihilation. It details optoelectronic characteristics of multi-chromophore, organic cascades that operate as photodetectors, light-emitting diodes and photovoltaic device with spectral response extending from visible to NIR.
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10

Conrad-Burton, Felisa. "Singlet Fission: A Twisted Tale." Thesis, 2021. https://doi.org/10.7916/d8-rd2f-n908.

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In the past decade, research in the field of singlet fission, the process in which one high energy singlet fission exciton forms two lower energy triplet excitons, has seen a resurgence as a process that has the potential to improve solar energy conversion efficiency and contribute to a push for renewable energy. While an impressive motivation, there is still much progress in terms of understanding the physics of the process as well as improving molecular design for actual applications that needs to be made before this motivation can be fully realized. Two significant current hurdles in this field are the extraction of the newly formed triplet excitons from their entangled triplet pair state before recombination, and the lack of stable chromophores with viable energetics for singlet fission and high triplet energies for application purposes. Over the past five years, we have addressed these issues with targeted molecular design. Only a couple of studies have successfully separated the triplet pair state in intramolecular singlet fission systems. We create an intramolecular singlet fission system, a PDI-pentacene-pentacene-PDI tetramer, in which a charge transfer state is utilized to separate an electronically entangled triplet pair. We have also shown that singlet fission can be controlled as well as actually induced in chromophores by employing molecular contortion to tune the energetics. With this work, we have contributed to the motivation of using singlet fission in real-life applications.
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Частини книг з теми "Singlet exciton fission"

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Alvertis, Antonios M. "Molecular Movie of Ultrafast Singlet Exciton Fission." In On Exciton–Vibration and Exciton–Photon Interactions in Organic Semiconductors, 143–67. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-85454-6_8.

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Alvertis, Antonios M. "Controlling the Coherent Versus Incoherent Character of Singlet Fission." In On Exciton–Vibration and Exciton–Photon Interactions in Organic Semiconductors, 169–96. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-85454-6_9.

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3

Bakulin, Artem A., Sarah E. Morgan, Jan Alster, Dassia Egorova, Alex Chin, Donatas Zigmantas, and Akshay Rao. "Vibrational Coherence Reveals the Role of Dark Multiexciton States in Ultrafast Singlet Exciton Fission." In Springer Proceedings in Physics, 226–29. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13242-6_54.

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Тези доповідей конференцій з теми "Singlet exciton fission"

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Zaykov, Alexandr, Josef Michl, Zdeněk Havlas, Eric Buchanan, and Milena Jovanović. "Singlet Fission: Chromophores for Exciton Downconversion." In nanoGe Fall Meeting 2019. València: Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.ngfm.2019.172.

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Zaykov, Alexandr, Josef Michl, Zdeněk Havlas, Eric Buchanan, and Milena Jovanović. "Singlet Fission: Chromophores for Exciton Downconversion." In nanoGe Fall Meeting 2019. València: Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.nfm.2019.172.

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Kolata, K., T. Breuer, G. Witte, and S. Chatterjee. "Singlet-Exciton Fission Dynamics in Single-Crystalline Perfluoropentacene." In Laser Science. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/ls.2015.lw5h.3.

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4

Biaggio, Ivan, and Eric A. Wolf. "Geminate exciton fusion fluorescence as a probe of triplet exciton transport after singlet fission." In Frontiers in Optics. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fio.2022.jtu4a.28.

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Анотація:
The transport mechanisms leading to spatial separation of triplet pairs after singlet exciton fission can be investigated using the photons emitted if the triplet excitons meet again. Dimensionality of transport can strongly affect fission efficiency.
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Wu, Tony C., Markus Einzinger, Julia Kompalla, Hannah L. Smith, Collin F. Perkinson, Lea Nienhaus, Sarah Wieghold, et al. "Sensitization of silicon by singlet exciton fission in tetracene." In Physical Chemistry of Semiconductor Materials and Interfaces IX, edited by Daniel Congreve, Christian Nielsen, and Andrew J. Musser. SPIE, 2020. http://dx.doi.org/10.1117/12.2567365.

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Friend, Richard. "New materials for singlet exciton fission to triplet pairs." In nanoGe Fall Meeting 2019. València: Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.ngfm.2019.339.

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Seiler, Hélène, Marcin Krynski, Daniela Zahn, Yoav William Windsor, Thomas Vasileiadis, Sebastian Hammer, Jens Pflaum, Mariana Rossi, Ralph Ernstorfer, and Heinrich Schwoerer. "Probing atomic motions accompanying singlet exciton fission in pentacene." In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/up.2020.th2a.5.

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Rao, Akshay, Andrew Musser, Philipp Kukura, and Christoph Schnedermann. "Exploring the Ultrafast Vibronic Dynamics of Singlet Exciton Fission." In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/up.2016.uw3a.1.

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9

Friend, Richard. "New materials for singlet exciton fission to triplet pairs." In nanoGe Fall Meeting 2019. València: Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.nfm.2019.339.

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Pandey, Ajay, Tasnuva Hamid, Soniya D. Yambem, Ross Crawford, and Jonathan Roberts. "Triplet energy transfer and triplet exciton recycling in singlet fission sensitized organic heterojunctions." In Organic, Hybrid, and Perovskite Photovoltaics XVIII, edited by Kwanghee Lee, Zakya H. Kafafi, and Paul A. Lane. SPIE, 2017. http://dx.doi.org/10.1117/12.2273804.

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Звіти організацій з теми "Singlet exciton fission"

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Shiozaki, Toru. Electronic Structure Theories of Singlet Fission and Multiple Exciton Generation. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1661872.

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Michl, J. Singlet-Fission Sensitizers for Ultra-High Efficiency Excitonic Solar Cells: 15 August 2005 - 14 October 2008. Office of Scientific and Technical Information (OSTI), December 2008. http://dx.doi.org/10.2172/945956.

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