Issue 40, 2018

Solvent-engineering toward CsPb(IxBr1−x)3 films for high-performance inorganic perovskite solar cells

Abstract

All-inorganic perovskites have aroused great interest recently because of their prominent photoelectric properties and thermal stability for stable, highly efficient perovskite solar cells. Herein, a two-step multiple spin coating method has been developed for the first time to prepare cesium halide perovskite films. In particular, dimethyl sulfoxide (DMSO) is introduced into CsBr/methanol precursor solution to increase the solubility of CsBr; in the meantime, it can also remarkably influence the morphologies, optical properties and photovoltaic performance of CsPb(IxBr1−x)3 (0 < x < 1) films. By regulating the content of DMSO, as high as 13.27% power conversion efficiency (PCE) has been achieved with a steady-state PCE of 12.5% under optimal conditions, which can maintain 98% of the initial PCE for 480 h under ambient conditions without encapsulation. The synergistic effect of the solvent-engineering method can provide a new access for good quality all-inorganic perovskite thin films for high performance optoelectronic devices.

Graphical abstract: Solvent-engineering toward CsPb(IxBr1−x)3 films for high-performance inorganic perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
16 Aug 2018
Accepted
09 Sep 2018
First published
11 Sep 2018

J. Mater. Chem. A, 2018,6, 19810-19816

Solvent-engineering toward CsPb(IxBr1−x)3 films for high-performance inorganic perovskite solar cells

B. Yu, H. Zhang, J. Wu, Y. Li, H. Li, Y. Li, J. Shi, H. Wu, D. Li, Y. Luo and Q. Meng, J. Mater. Chem. A, 2018, 6, 19810 DOI: 10.1039/C8TA07968D

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