2024-03-28T21:44:21Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/680172022-11-17T02:08:08Zhdl_2115_20057hdl_2115_148Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene CompositesNair, Vijayakumar C.Muthu, ChinnaduraiRogach, Andrey L.Kohara, ReikoBiju, Vasudevanpillaielectron transferexciton migrationfluorescence quenchingfullerenesperovskite nanocrystals425Hydrophobically 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.Wiley-BlackwellJournal Articleapplication/pdfhttp://hdl.handle.net/2115/68017https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/68017/1/Biju_Angew_2016.pdf1433-7851Angewandte chemie-international edition565121412182017-01-24enginfo:pmid/28035788info:doi/10.1002/anie.201610070This 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.author