Maskless fabrication of quasi-omnidirectional V-groove solar cells using an alkaline solution-based method

Silicon passivated emitter and rear contact (PERC) solar cells with V-groove texture were fabricated using maskless alkaline solution etching with in-house developed additive. Compared with the traditional pyramid texture, the V-groove texture possesses superior effective minority carrier lifetime,...

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Bibliographic Details
Published in:Chinese physics B 2023-12, Vol.33 (1), p.18801-266
Main Authors: Chen, Xingqian, Wang, Yan, Chen, Wei, Liu, Yaoping, Xing, Guoguang, Feng, Bowen, Li, Haozhen, Sun, Zongheng, Du, Xiaolong
Format: Article
Language:English
Subjects:
alkaline etching
quasi omnidirectionality
silicon solar cell
V-groove
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Summary:Silicon passivated emitter and rear contact (PERC) solar cells with V-groove texture were fabricated using maskless alkaline solution etching with in-house developed additive. Compared with the traditional pyramid texture, the V-groove texture possesses superior effective minority carrier lifetime, enhanced p–n junction quality and better applied filling factor (FF). In addition, a V-groove texture can greatly reduce the shading area and edge damage of front Ag electrodes when the V-groove direction is parallel to the gridline electrodes. Due to these factors, the V-groove solar cells have a higher efficiency (21.78%) than pyramid solar cells (21.62%). Interestingly, external quantum efficiency (EQE) and reflectance of the V-groove solar cells exhibit a slight decrease when the incident light angle ( θ ) is increased from 0° to 75°, which confirms the excellent quasi omnidirectionality of the V-groove solar cells. The proposed V-groove solar cell design shows a 2.84% relative enhancement of energy output over traditional pyramid solar cells.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/ad0cd0