RESEARCH ON GETTERING PROCESS OF HIGH-EFFICIENCY HJT SOLAR CELLS

Zhang Junbing; Jiang Xiulin; Chen Xiaoye; Wang Kai; Li Yuanhao; Li Ya

doi:10.19912/j.0254-0096.tynxb.2024-0451

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (7) : 582-588. DOI: 10.19912/j.0254-0096.tynxb.2024-0451

Special Topics of Academic Papers at the 89th Annual Meeting of the China Association for Science and Technology

RESEARCH ON GETTERING PROCESS OF HIGH-EFFICIENCY HJT SOLAR CELLS

Zhang Junbing¹, Jiang Xiulin^1,2, Chen Xiaoye¹, Wang Kai¹, Li Yuanhao¹, Li Ya¹

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Abstract

This paper investigates the effect of the gettering process on the performance enhancement of HJT solar cells. Firstly, the performance difference of silicon wafers at different positions of the silicon rods was analyzed, and it was found that the distribution of C and O concentration was correlated with the changes in the minority lifetime. Secondly, the effect of gettering process on silicon wafers was investigated, and it was found that the concentration of metal impurities in the bulk of wafers was decreased after gettering, which leads to the enhancement of the minority lifetime of the wafers and IV characteriftics. Further more, different gettering process conditions on the solar cells’ performance were investigated, and the results showed minimal differences among these conditions in terms of solar cell performance. Finally, the efficiency difference of different minority lifetime ranges before and after gettering was studied, and the lower limit of the minority lifetime of silicon wafers was explored. The study shows that the gettering process could reduce the quality and cost requirements of raw silicon wafers for gettering process can decrease the concentration of metal impurities and SRH recombination, which is conducive to the efficiency stability of the production line and a very suitable cost down process and an effective efficiency enhancement method for the mass production of HJT high-efficiency solar cells.

Key words

solar cell / gettering / diffusion / lifetime

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Zhang Junbing, Jiang Xiulin, Chen Xiaoye, Wang Kai, Li Yuanhao, Li Ya. RESEARCH ON GETTERING PROCESS OF HIGH-EFFICIENCY HJT SOLAR CELLS[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 582-588 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0451

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