[Lecture] Deep-Level Defect Passivation in Cu₂ZnSn(S,Se)₄ Absorber Layers and Performance Enhancement of Photovoltaic Devices

Lecturer: Professor Zhou Zhengji (Henan University)

Date: February 3, 2026 (Tuesday)

Time: 15:30  

Venue: Conference Room 533, Science and Technology Building

Organizers: School of Physics and Electronic Engineering & Office of Science and Technology

Introduction to the Lecture: Cu₂ZnSn(S,Se)₄ (CZTSSe) has attracted wide attention as an abundant and eco-friendly photovoltaic material. The key bottleneck currently restricting further improvements in its photovoltaic performance is the open-circuit voltage deficit. This report mainly introduces a series of studies by the research group on deep-level defect passivation and band engineering in CZTSSe absorber layers. Through strategies such as isovalent element doping, elemental gradient distribution, and alkali metal treatment, the team has effectively suppressed defects in the absorber layer and at interfaces in CZTSSe solar cells. This has significantly improved the open-circuit voltage and carrier collection efficiency of the photovoltaic devices, realizing continuous enhancement of the power conversion efficiency of solar cells.

Introduction to the Lecturer: Professor Zhou Zhengji is a Doctoral Supervisor at Henan University. His research mainly focuses on novel optoelectronic materials and devices. He has served as a visiting scholar at The Chinese University of Hong Kong, the University of Pittsburgh, and other institutions. He has published more than 70 papers in internationally renowned academic journals, contributed to one book, and holds three authorized national invention patents. He has presided over one sub-project of the National Key Research and Development Program of China and three projects of the National Natural Science Foundation of China. He has received one Second Prize of Henan Provincial Natural Science Award and one Third Prize of Henan Provincial Science and Technology Progress Award.

Source: NYNU Academic Activities (Chinese)

 https://www.nynu.edu.cn/info/1048/31285.htm