Issue 44, 2019
From the journal:

Journal of Materials Chemistry C

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

Zhun Yao,a   Zhiwen Jin, ORCID logo *b   Xiaorong Zhang,a   Qian Wang, ORCID logo b   Hong Zhang,bc   Zhuo Xu,*a   Liming Ding ORCID logo *d  and  Shengzhong (Frank) Liu*a  

* Corresponding authors

a Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, P. R. China
E-mail: xuzh@snnu.edu.cn, szliu@dicp.ac.cn

b School of Physical Science and Technology & Key Laboratory for Magnetism and Magnetic Materials of MoE & Key Laboratory of Special Function Materials and Structure Design, MoE & National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou 730000, China
E-mail: jinzw@lzu.edu.cn

c Electron Microscopy Centre, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China

d Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China
E-mail: ding@nanoctr.cn

Abstract

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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Article information

DOI
https://doi.org/10.1039/C9TC04851K
Article type
Communication
Submitted
03 Sep 2019
Accepted
13 Oct 2019
First published
15 Oct 2019

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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