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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 its prominent photoelectric property 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. Especially, 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 property and the 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% at an optimal condition, which can maintain 98% of the initial PCE for 480 h under ambient conditions without encapsulation. The synergistic effect of solvent-engineering method can provide a new access for good quality allinorganic perovskite thin films for high performance optoelectronic devices.

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Publication details

The article was received on 16 Aug 2018, accepted on 09 Sep 2018 and first published on 11 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07968D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Solvent-engineering toward CsPb(IxBr1-x)3 films for high-performance inorganic perovskite solar cells

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

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