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Issue 42, 2018
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Large-area perovskite solar cells with CsxFA1−xPbI3−yBry thin films deposited by a vapor–solid reaction method

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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 first deposited via thermal evaporation, and then exposed to FAI/FACl vapor to form the CsxFA1−xPbI3−yBry perovskite. With the incorporation of CsBr, the crystallinity of the FAPbI3 perovskite could be significantly improved. Meanwhile, the FACl vapor could accelerate the growth rate of the 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. Based on these films, the small sized perovskite solar cells (PSCs) reached a champion power conversion efficiency (PCE) of 17.29%. Without encapsulation, the device with the Cs0.24FA0.76PbI3−yBry perovskite showed much better moisture and thermal stability in comparison to that with the pristine FAPbI3 perovskite. Furthermore, we also fabricated PSC modules with a size of 8 × 8 cm2 and achieved a PCE of 12.24%, indicating that such a vapor–solid reaction method has a certain superiority in the manufacture of large-scale PSCs.

Graphical abstract: Large-area perovskite solar cells with CsxFA1−xPbI3−yBry thin films deposited by a vapor–solid reaction method

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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, 2018,6, 21143-21148
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    Large-area perovskite solar cells with CsxFA1−xPbI3−yBry thin films deposited by a vapor–solid reaction method

    L. Luo, Y. Zhang, N. Chai, X. Deng, J. Zhong, F. Huang, Y. Peng, Z. Ku and Y. Cheng, J. Mater. Chem. A, 2018, 6, 21143
    DOI: 10.1039/C8TA06557H

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