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https://hdl.handle.net/20.500.14094/90006968
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2024-04-26
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90006968 (fulltext)
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90006968
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open access
出版タイプ
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タイトル
Electron spin polarization generated by transport of singlet and quintet multiexcitons to spin-correlated triplet pairs during singlet fissions
著者
Matsuda, Saki ; Oyama, Shinya ; Kobori, Yasuhiro
著者名
Matsuda, Saki
著者名
Oyama, Shinya
著者ID
A0352
研究者ID
1000000282038
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=e479568dc9d00d05520e17560c007669
著者名
Kobori, Yasuhiro
小堀, 康博
コボリ, ヤスヒロ
所属機関名
分子フォトサイエンス研究センター
収録物名
Chemical Science
巻(号)
11(11)
ページ
2934-2942
出版者
Royal Society of Chemistry
刊行日
2020
公開日
2020-03-27
抄録
Singlet fission (SF) is expected to exceed the Shockley–Queisser theoretical limit of efficiency of organic solar cells. Transport of spin-entanglement in the triplet–triplet pair state via one singlet exciton is a promising phenomenon for several energy conversion applications including quantum information science. However, direct observation of electron spin polarization by transport of entangled spin-states has not been presented. In this study, time-resolved electron paramagnetic resonance has been utilized to observe the transportation of singlet and quintet characters generating correlated triplet–triplet (T + T) exciton-pair states by probing the electron spin polarization (ESP) generated in thin films of 6,13-bis(triisopropylsilylethynyl)pentacene. We have clearly demonstrated that the ESP detected at the resonance field positions of individual triplet excitons is dependent on the morphology and on the detection delay time after laser flash to cause SF. ESP was clearly explained by quantum superposition of singlet–triplet–quintet wavefunctions via picosecond triplet-exciton dissociation as the electron spin polarization transfer from strongly exchange-coupled singlet and quintet TT states to weakly-coupled spin-correlated triplet pair states. Although the coherent superposition of spin eigenstates was not directly detected, the present interpretation of the spin correlation of the separated T + T exciton pair may pave new avenues not only for elucidating the vibronic role in the de-coupling between two excitons but also for scalable quantum information processing using quick T + T dissociation via one-photon excitation.
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分子フォトサイエンス研究センター
学術雑誌論文
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This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
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資源タイプ
journal article
言語
English (英語)
ISSN
2041-6520
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AA12555653
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関連情報
DOI
https://doi.org/10.1039/C9SC04949E
URI
https://www.kobe-u.ac.jp/research_at_kobe/NEWS/news/2020_02_20_01.html
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