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

Vijayakumar C. Nair; Chinnadurai Muthu; Andrey L.  Rogach; Reiko Kohara; Vasudevanpillai Biju

doi:10.1002/anie.201610070

Author(s)

Vijayakumar C. Nair
Chinnadurai Muthu
Andrey L. Rogach
Reiko Kohara
Vasudevanpillai Biju

Related Research Unit(s)

Centre for Functional Photonics

Detail(s)

Original language	English
Pages (from-to)	1214-1218
Journal / Publication	Angewandte Chemie - International Edition
Volume	56
Issue number	5
Online published	30 Dec 2016
Publication status	Published - 24 Jan 2017

Link(s)

DOI	DOI https://doi.org/10.1002/anie.201610070 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85007495636&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(141d4551-5d3c-41c2-ab0d-414f9601f269).html

Abstract

Hydrophobically capped nanocrystals of formamidinium lead bromide (FAPbBr3) perovskite (PNC) show bright and stable fluorescence in solution and thin-film states. When compared with isolated PNCs in a solution, close-packed PNCs in a thin film show extended fluorescence lifetime (ca. 4.2 μs), 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 (C60), which is attributed to channeling of exciton migration into electron transfer to C60. 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 C60 adsorbed onto the hydrophobic surface of individual PNCs. Exciton migration among close-packed PNCs and electron transfer to C60 places C60-doped PNC thin films among cost-effective antenna systems for solar cells.

Research Area(s)

electron transfer, exciton migration, fluorescence quenching, fullerenes, perovskite nanocrystals

Citation Format(s)

[ RIS ] [ BibTeX ]

Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites. / Nair, Vijayakumar C.; Muthu, Chinnadurai; Rogach, Andrey L. et al.

In: Angewandte Chemie - International Edition, Vol. 56, No. 5, 24.01.2017, p. 1214-1218.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Nair, VC, Muthu, C, Rogach, AL, Kohara, R & Biju, V 2017, 'Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites', Angewandte Chemie - International Edition, vol. 56, no. 5, pp. 1214-1218. https://doi.org/10.1002/anie.201610070

Nair, V. C., Muthu, C., Rogach, A. L., Kohara, R., & Biju, V. (2017). Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites. Angewandte Chemie - International Edition, 56(5), 1214-1218. https://doi.org/10.1002/anie.201610070

Nair VC, Muthu C, Rogach AL, Kohara R, Biju V. Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites. Angewandte Chemie - International Edition. 2017 Jan 24;56(5):1214-1218. Epub 2016 Dec 30. doi: 10.1002/anie.201610070

Nair, Vijayakumar C. ; Muthu, Chinnadurai ; Rogach, Andrey L. et al. / Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites. In: Angewandte Chemie - International Edition. 2017 ; Vol. 56, No. 5. pp. 1214-1218.