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Large-area perovskite solar cells with CsxFA1-xPbI3-xBrx thin film deposited by vapor-solid reaction method

Abstract

Large-area, highly uniform CsxFA1-xPbI3-yBry mixed cation perovskite films were prepared by a facile vapor-solid reaction method. In this method, CsBr and PbI2 were firstly deposited via thermal evaporation, and then exposed to FAI/FACl vapor to form CsxFA1-xPbI3-yBry perovskite. With the incorporating of CsBr, the crystallinity of FAPbI3 perovskite could be significantly improved. Meanwhile, the FACl vapor could accelerate the growth rate of CsxFA1-xPbI3-yBry perovskite in the vapor-solid reaction process. By optimizing the content of Cs and the ratio of FACl/FAI, we obtained high quality, pin-hole free Cs0.24FA0.76PbI3-yBry films. And based on these films, the perovskite solar cells (PSCs) in small size reached a champion power conversion efficiency (PCE) of 17.29%. Without encapsulation, the device with Cs0.24FA0.76PbI3-yBry perovskite showed much better moisture- and thermal-stability in comparison to that with the pristine FAPbI3 perovskite. Further, we also fabricated PSCs modules with the size of 8 × 8 cm2 and achieved a PCE of 12.24%, indicating such vapor-solid reaction method have certain superiority in the manufacture of large-scale PSCs.

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Publication details

The article was received on 09 Jul 2018, accepted on 30 Sep 2018 and first published on 01 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA06557H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Large-area perovskite solar cells with CsxFA1-xPbI3-xBrx thin film deposited by vapor-solid reaction method

    L. Luo, Y. Zhang, N. Chai, X. Deng, J. Zhong, F. Huang, Y. Peng, Y. Cheng and Z. Ku, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA06557H

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