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Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites

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Title: Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites
Authors: Nair, Vijayakumar C. Browse this author
Muthu, Chinnadurai Browse this author
Rogach, Andrey L. Browse this author
Kohara, Reiko Browse this author
Biju, Vasudevanpillai Browse this author
Keywords: electron transfer
exciton migration
fluorescence quenching
perovskite nanocrystals
Issue Date: 24-Jan-2017
Publisher: Wiley-Blackwell
Journal Title: Angewandte chemie-international edition
Volume: 56
Issue: 5
Start Page: 1214
End Page: 1218
Publisher DOI: 10.1002/anie.201610070
PMID: 28035788
Abstract: Hydrophobically capped nanocrystals of formamidinium lead bromide (FAPbBr(3)) perovskite (PNC) show bright and stable fluorescence in solution and thin-film states. When compared with isolated PNCs in a solution, closepacked PNCs in a thin film show extended fluorescence lifetime (ca. 4.2 mu s), which is due to hopping or migration of photogenerated excitons among PNCs. Both fluorescence quantum efficiency and lifetime decrease in a PNC thin film doped with fullerene (C-60), which is attributed to channeling of exciton migration into electron transfer to C-60. On the other hand, quenching of fluorescence intensity of a PNC solution is not accompanied by any change in fluorescence lifetime, indicating static electron transfer to C-60 adsorbed onto the hydrophobic surface of individual PNCs. Exciton migration among close-packed PNCs and electron transfer to C-60 places C-60-doped PNC thin films among cost-effective antenna systems for solar cells.
Rights: This is the peer reviewed version of the following article: [V. C. Nair, C. Muthu, A. L. Rogach, R. Kohara, V. Biju, Angew. Chem. Int. Ed. 2017, 56(5), 1214-1218.], which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Type: article (author version)
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: BIJU, Vasudevan Pillai

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