open access

https://hdl.handle.net/2115/68017

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

英語

perovskite nanocrystals

2017-01-24

Wiley-Blackwell

Angewandte chemie-international edition

56(5)

1214-1218

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.

学術雑誌論文

Accepted Manuscript

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 http://dx.doi.org/10.1002/anie.201610070. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

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