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Issue 33, 2019
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Crystal structure design and multiband physical properties of quaternary sulfide Ba5Bi2Co2S10 for optoelectronic conversion†

Kejun Bu,ab   Xian Zhang, ORCID logo *c   Jian Huang,a   Mengjia Luo,ab   Chong Zheng,d   Ruiqi Wang,e   Dong Wang,a   Jianqiao He,ab   Wei Zhao,a   Xiangli Che*a  and  Fuqiang Huang ORCID logo *ac  
Author affiliations

* Corresponding authors

a State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
E-mail: huangfq@mail.sic.ac.cn

b University of Chinese Academy of Sciences, Beijing 100049, China

c Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, P. R. China
E-mail: zhangxian@qxslab.cn

d Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, USA

e State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China

Abstract

Multiband materials have received increasing attention due to their superior solar absorption properties. Here we design a new multiband compound, namely Ba5Bi2Co2S10, which crystallizes in the space group C22h-P21/m (No. 11) of the monoclinic system. Ba5Bi2Co2S10 is composed of one-dimensional 1∞[Bi2Co2S10]10− chains along the a axis. The adjacent chains are separated by Ba2+ ions. The optical band gap of the compound is 1.05 eV and 0.74 eV, presenting typical multi-absorption characteristics. First-principles calculations, which are perfectly consistent with the experimental results, show that the hybrid coupling effect between Co and S gives rise to multiband characteristics. Evident optoelectronic conversion properties were observed under visible light illumination with a photocurrent density of 4.0 mA cm−2 at 1 V.

Graphical abstract: Crystal structure design and multiband physical properties of quaternary sulfide Ba5Bi2Co2S10 for optoelectronic conversion

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Article information

https://doi.org/10.1039/C9CC00794F
Submitted
29 Jan 2019
Accepted
25 Mar 2019
First published
26 Mar 2019
Chem. Commun., 2019,55, 4809-4812
Article type
Communication
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Crystal structure design and multiband physical properties of quaternary sulfide Ba5Bi2Co2S10 for optoelectronic conversion

K. Bu, X. Zhang, J. Huang, M. Luo, C. Zheng, R. Wang, D. Wang, J. He, W. Zhao, X. Che and F. Huang, Chem. Commun., 2019, 55, 4809
DOI: 10.1039/C9CC00794F

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