STUDY ON FRONT METALLIZATION OF TOPCON SOLAR CELL BY LECO PROCESS

Chen Dong; Fu Ming; Li Yunjun; Fan Lin; Pan Chaopeng; Xu Hejian

doi:10.19912/j.0254-0096.tynxb.2024-0723

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 391-397. DOI: 10.19912/j.0254-0096.tynxb.2024-0723

STUDY ON FRONT METALLIZATION OF TOPCON SOLAR CELL BY LECO PROCESS

Chen Dong^1,2, Fu Ming^1,2, Li Yunjun², Fan Lin², Pan Chaopeng², Xu Hejian²

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Abstract

Combining laser enhanced contact optimization （LECO） technology on the front of cells and preparing n-type TOPCon solar cells metallized electrode, the reliability of metal electrode is investigated by simulating damp and hot condition of outdoor work through acetic acid spray experiment. The glass performance is analyzed via TGA-DSC. The electrical performances of solar cells before and after LECO treatment are analyzed. It is found that the transition temperature （T_g） of glass for the LECO proces should not be too low, and the etching ability should not be too strong. Pb-B-Si and Pb-B-Si-Bi system glasses are more suitable for the LECO process than Pb-B-Te system glasses. The acetic acid resistance of the cells is analyzed,and it is found that the conversion efficiency of Pb-B-Si-Bi glass front silver electrode has less attenuation.

Key words

solar cells / metallization / reliability / conversion efficiency / glass powder / LECO process

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Chen Dong, Fu Ming, Li Yunjun, Fan Lin, Pan Chaopeng, Xu Hejian. STUDY ON FRONT METALLIZATION OF TOPCON SOLAR CELL BY LECO PROCESS[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 391-397 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0723

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