CUMULATIVE ABNORMAL PHENOMENA OF TOPCon SOLAR CELLS UNDER UV IRRADIATION

Li Yuepeng; Yuan Zhengguo; Huang Xinyu; Xie Taihong; Xie Yi; Yu Jian

doi:10.19912/j.0254-0096.tynxb.2025-0578

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (8) : 211-216. DOI: 10.19912/j.0254-0096.tynxb.2025-0578

CUMULATIVE ABNORMAL PHENOMENA OF TOPCon SOLAR CELLS UNDER UV IRRADIATION

Li Yuepeng^1,2, Yuan Zhengguo², Huang Xinyu¹, Xie Taihong², Xie Yi², Yu Jian¹

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Abstract

This study investigates the metastable effect and ultraviolet （UV） irradiation influence on tunnel oxide passivated contact （TOPCon） solar cells through experimental methods. The results demonstrate that TOPCon solar cells exhibit a metastable effect, and the impact of UV irradiation on the cells follows a trend of initial enhancement followed by degradation. After approximately 1 s of UV pretreatment, the average power conversion efficiency （PCE） of the cells increases by 0.07%, accompanied by a 0.89 mV improvement in open-circuit voltage （V_oc） and a 0.15% rise in fill factor （FF）. However, prolonged UV irradiation degrades the passivation effectiveness, ultimately reducing the PCE. For the first time, this paper finds that short-time UV irradiation treatment on the cell can improve its efficiency, which lays an important foundation for the development of high-efficiency and low-cost TOPCon solar cells.

Key words

solar cells / metastable effect / UV irradiation / power conversion efficiency / high-efficiency and low-cost / TOPCon

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Li Yuepeng, Yuan Zhengguo, Huang Xinyu, Xie Taihong, Xie Yi, Yu Jian. CUMULATIVE ABNORMAL PHENOMENA OF TOPCon SOLAR CELLS UNDER UV IRRADIATION[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 211-216 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0578

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