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Issue 44, 2019
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Pseudohalide (SCN)-doped CsPbI3 for high-performance solar cells

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Cesium lead halide CsPbI3 is regarded as a promising material to solve the issues of material decomposition and ion migration caused by the organic group in organic–inorganic hybrid perovskite solar cells (PSCs) under operating conditions. However, there are many defects in a pure CsPbI3 material and its cubic phase (α-phase) is thermodynamically unstable, which will prevent a high device performance. Here, we incorporated the pseudohalide ion SCN in a CsPbI3 thin film to improve the crystallinity with smooth perovskite films. The results of XRD and PL showed that the crystallization property of the CsPbI3 thin films with the addition of Pb(SCN)2 exhibited a huge improvement compared to the reference. The champion power conversion efficiency (PCE) of CsPbI3 PSCs with the optimized Pb(SCN)2 additive (2%) could reach as high as 17.04%. In addition, the CsPbI3 films with the Pb(SCN)2 additive exhibited higher thermal stability than the reference one.

Graphical abstract: Pseudohalide (SCN−)-doped CsPbI3 for high-performance solar cells

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Publication details

The article was received on 03 Sep 2019, accepted on 13 Oct 2019 and first published on 15 Oct 2019

Article type: Communication
DOI: 10.1039/C9TC04851K
J. Mater. Chem. C, 2019,7, 13736-13742

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    Pseudohalide (SCN)-doped CsPbI3 for high-performance solar cells

    Z. Yao, Z. Jin, X. Zhang, Q. Wang, H. Zhang, Z. Xu, L. Ding and S. (. Liu, J. Mater. Chem. C, 2019, 7, 13736
    DOI: 10.1039/C9TC04851K

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