Abstract
Shingled string technology can be used to maximize the output power of photovoltaic modules. The maximum power (Pmax) of a shingled photovoltaic module can be increased by using a bifacial heterojunction with an intrinsic thin layer (HIT) of cells. To fabricate the shingled strings for a high power module, we first cut 6-inch solar cells by laser scribing while minimizing cutting loss. Unlike standard crystalline silicon (c-Si) solar cells, the structure of bifacial HIT solar cells is weak under thermal effect, so an optimal scribing condition had to be found. After laser scribing processes had been optimized, Pmax was increased by 0.02W for each separated solar cells when we using an ultraviolet (UV) laser compared to the green laser, and a UV cut shingled string of HIT cell was demonstrated for the first time.
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Acknowledgments
This work was supported by “Development of bifacial shingled photovoltaic module for high power performance” of the Korea Institute of Industrial Technology (KITECH) (No. JB200009).
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Jee, H., Lee, J., Moon, D. et al. Characterization of the Laser Scribing Process of HIT Cells for a Photovoltaic Shingled Module. J. Korean Phys. Soc. 77, 971–974 (2020). https://doi.org/10.3938/jkps.77.971
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DOI: https://doi.org/10.3938/jkps.77.971