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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

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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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Publication details

The article was received on 29 Jan 2019, accepted on 25 Mar 2019 and first published on 26 Mar 2019


Article type: Communication
DOI: 10.1039/C9CC00794F
Citation: Chem. Commun., 2019,55, 4809-4812

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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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