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Abstract
Antimony selenosulfide (Sb₂(S,Se)₃) is an emerging photovoltaic material featuring a tunable band gap of 1.1–1.8 eV, excellent environmental stability, and abundant elemental reserves. According to the Shockley-Queisser (SQ) limit, the theoretical power conversion efficiency of Sb₂(S,Se)₃-based solar cells can exceed 33%. Additionally, pure Sb₂S₃ and Sb₂Se₃ are well-suited as sub-cell absorbers for tandem photovoltaic devices, compatible with mainstream solar platforms including silicon and perovskite solar cells. Despite its superior optoelectronic properties, the fabrication of high-quality Sb₂(S,Se)₃ thin films remains a core challenge for high-performance device construction. In this talk, I will present the Sb₂(S,Se)₃ thin film synthesis methods developed in our group, covering hydrothermal deposition strategies and vapor deposition. Subsequently, I will elaborate on the regulation and optimization of deep-level defects within Sb₂(S,Se)₃ thin films. Finally, I will share our recent research advances in the structural design and precise fabrication of high-efficiency Sb₂(S,Se)₃ solar devices.
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Brief Bio
Dr. Tao Chen is a full professor at the University of Science and Technology of China. His research centers on inorganic thin-film solar cells. His research group has established a hydrothermal deposition strategy to fabricate antimony selenosulfide (Sb2(S,Se)3) thin films for photovoltaic devices, breaking the longstanding 10% power conversion efficiency bottleneck.
Dr. Chen has authored 230+ peer-reviewed articles, including Nature Energy (3), Nature Photonics, Accounts of Chemical Research, Nature Communications (2), Advanced Materials (12), Angewandte Chemie International Edition (2), and Energy & Environmental Science (7), among others. His cumulative citations exceed 11,000, and his H-index stands at 70. He served on the editorial boards of multiple journals such as Journal of Semiconductors (JoS) and Nano Research.
