Issue 18, 2019

Efficient and stable all-inorganic perovskite solar cells based on nonstoichiometric CsxPbI2Brx (x > 1) alloys

Abstract

Here we report a systematic study of all-inorganic perovskite-inspired systems based on CsxPbI2Brx alloys with x ranging from 0.95 to 4. The identified optimal non-stoichiometric composition Cs1.2PbI2Br1.2 delivered the best optoelectronic, structural and photovoltaic characteristics in combination with the improved stability. The elucidated remarkable effect of the Cs4PbI2Br4 impurity phase, serving as a reservoir of CsBr, on the photothermal stability and photovoltaic performance of CsPbI2Br perovskite films offers a new paradigm in the development of more efficient and stable all-inorganic perovskite solar cells.

Graphical abstract: Efficient and stable all-inorganic perovskite solar cells based on nonstoichiometric CsxPbI2Brx (x > 1) alloys

Supplementary files

Article information

Article type
Paper
Submitted
05 Sep 2018
Accepted
06 Mrz 2019
First published
20 Mrz 2019

J. Mater. Chem. C, 2019,7, 5314-5323

Efficient and stable all-inorganic perovskite solar cells based on nonstoichiometric CsxPbI2Brx (x > 1) alloys

L. A. Frolova, Q. Chang, S. Yu. Luchkin, D. Zhao, A. F. Akbulatov, N. N. Dremova, A. V. Ivanov, E. E. M. Chia, K. J. Stevenson and P. A. Troshin, J. Mater. Chem. C, 2019, 7, 5314 DOI: 10.1039/C8TC04488K

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