IMPROVEMENT FOR SILICON HETEROJUNCTION SOLAR CELLS BY THERMALLY ASSISTED LIGHT SOAKING

Gu Xuehui; Wang Na; Tang Ning; Xiao Honghai; Han Anjun; Liu Wenzhu; Liu Zhengxin

doi:10.19912/j.0254-0096.tynxb.2025-0178

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (6) : 727-731. DOI: 10.19912/j.0254-0096.tynxb.2025-0178

IMPROVEMENT FOR SILICON HETEROJUNCTION SOLAR CELLS BY THERMALLY ASSISTED LIGHT SOAKING

Gu Xuehui^1,2, Wang Na², Tang Ning³, Xiao Honghai⁴, Han Anjun², Liu Wenzhu², Liu Zhengxin^1,2

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Abstract

This paper investigated the effect of thermally assisted light soaking （TALS） on the performance of amorphous/crystalline silicon heterojunction （SHJ） solar cells. The experimental results confirm that light soaking （LS） effectively improves the power conversion efficiency and fill factor of SHJ solar cells by 0.23% and 0.91%, while TALS increases the gain to 0.34% and 0.98%. By measuring the dark electric conductivity of doped amorphous silicon films before and after the TALS, it is found that TALS has more significant effect on improving the electrical properties of the films compared to LS, enabling n-type amorphous silicon thin film dark electric conductivity gain ratio of 9.05. Combined with Sinton WCT-120 and Suns-V_oc measurements, it is concluded that TALS improves the field passivation performance, enhancing the built-in electric field strength of crystalline silicon and amorphous silicon heterojunction, thus reduces the recombination of minority carriers at the interface, resulting in a light-induced gain of 0.34% in the output performance of SHJ solar cells.

Key words

amorphous/crystalline silicon heterojunction solar cells / silicon heterojunction solar cells / light soaking / thermally assisted light soaking / photo conductivity / minority carrier lifetime

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Gu Xuehui, Wang Na, Tang Ning, Xiao Honghai, Han Anjun, Liu Wenzhu, Liu Zhengxin. IMPROVEMENT FOR SILICON HETEROJUNCTION SOLAR CELLS BY THERMALLY ASSISTED LIGHT SOAKING[J]. Acta Energiae Solaris Sinica. 2026, 47(6): 727-731 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0178

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