Prof.  Tao  Chen
Department of Materials Science & Engineering, University of Science & Technology of China (USTC),  China

Title: Antimony Selenosulfide as Emerging Solar Cell Materials

Abstract:

Antimony selenosulfide, Sb₂(S,Se)₃, is a kind of emerging light harvesting material for solar cell applications. This class of materials possess earth-abundant compositional elements, excellent stability as suitable photovoltaic properties. As new solar cell materials, to understand the fundamental properties, development of film fabrication method and constructing device structures are critical for the efficiency improvement. In this presentation, I will firstly introduce the defect characteristics of this class of materials and propose possible approaches for suppress the deep level defect. Afterwards, I will introduce our recent research in the development of film fabrication method, where we found that the hydrothermal deposition is able to generate Sb₂(S,Se)₃ film with flat and compact surface morphology, reduced defect and favorable crystal orientation. With that, the solar cell overcoming the 10% bottleneck efficiency, this efficiency achievement highlights the great poential of Sb₂(S,Se)₃ as light harvesting material.

Keywords: antimony selenosulfide, solar cell, defect engineering, power conversion efficiency, materials synthesis

Refences:

1.      B. Che, Z. Y. Cai, P. Xiao, G. Li, Y. Q. Huang, R. F. Tang, C. F. Zhu, S. F. Yang, T. Chen, Thermally Driven Point Defect Transformation in Antimony Selenosulfide Photovoltaic Materials, Adv. Mater., 2023, 35, 2208564.

2.      W. T. Lian, C. H. Jiang, Y. W. Yin, R. F. Tang, G. Li, L. J. Zhang, B. Che, T. Chen, Revealing composition and structure dependent deep-level defect in antimony trisulfide photovoltaics, Nat. Commun., 2021, 12, 3260.

3.        R. F. Tang, X. M. Wang, W. T. Lian, J. L. Huang, Q. Wei, M. L. Huang, Y. Y. Yin, C. H. Jiang, S. F. Yang, G. C. Xing, S. Y. Chen, C. F. Zhu, X. J. Hao, M. A. Green, T. Chen, Hydrothermal deposition of antimony selenosulfide thin films enables solar cells with 10% efficiency, Nat. Energy, 2020, 5, 587-595.

4.        X. M. Wang, R. F. Tang, C. H. Jiang, W. T. Lian, H. X. Ju, G. S. Jiang, Z. Q. Li, C. F. Zhu, T. Chen, Manipulating the electrical properties of Sb₂(S,Se)₃ film for high-efficiency solar cells, Adv. Energy Mater., 2020, 2002341. 

5.        Y. W. Yin, C. H. Jiang, Y. Y. Ma , X. M. Wang, R. F. Tang, L. J. Zhang, Z. Q. Li, C. F. Zhu, T. Chen, Sequential Co-Evaporation and Deposition of Sb₂(S,Se)₃ Thin Film for Efficient Solar Cells, Adv. Mater., 2021, 2006689.

Biography:

Dr. Tao Chen is a professor at the Department of Materials Science & Engineering, University of Science & Technology of China (USTC). He obtained his PhD degree in 2010 from Nanyang Technological University (Singapore). In 2011, he moved to the Department of Physics of the Chinese University of Hong Kong working as a Research Assistant Professor. In 2015, he joined the Department of Materials Science & Engineering at USTC under a Chinese talent recruitment program. His research focusses mainly on the fundamental understanding and efficiency improvement of antimony-based thin film solar cell and the development of new concept solar cells. Dr. Chen has published 160+ papers, including Nature Energy, Nature Communications, Advanced Materials, and so on, with H-index of 55.