Addressing separation and edge passivation challenges for high efficiency shingle heterojunction solar cells

نویسندگان

چکیده

We are reporting the fabrication of high efficiency Silicon heterojunction shingle solar cells with very limited performance losses related to cell separation. A clean and innovative separation process was elaborated optimized, based on 45° rotated silicon brick wafers fabrication, allowing alignment preferential cleavage plan (110) bus bars. Hence, a simple but efficient mechanical crack propagation sufficient insure proper shingles cut. The smooth resulting edges were found be sensitive surface passivation technologies. Aluminum oxide layers fabricated by atomic layer deposition specifically developed so that their activation is fully compatible low temperature constraints (typically less than 220°C). Interestingly, we showed annealing alone not activate such layers; alternative forming gas and/or light soaking treatments thus successfully applied instead values measured bare samples. Such then deposited activated wafer cleaved edges. Applied for example configuration, managed recover up 80% initial loss due separation, limiting overall 0.2% absolute.

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ژورنال

عنوان ژورنال: Solar Energy Materials and Solar Cells

سال: 2023

ISSN: ['0927-0248', '1879-3398']

DOI: https://doi.org/10.1016/j.solmat.2022.112095