Very thin crystalline silicon cells: A way to improve the photovoltaic performance at elevated temperatures

In general, the conversion efficiency of solar cells decreases with the increase in temperature. This temperature dependence is mitigated by enhancing the open circuit voltage (VOC). Given a solar cell, its VOC can be enhanced by several routes, for example, reducing the defect density within the ab...

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Bibliographic Details
Published in:Progress in photovoltaics 2021-10, Vol.29 (10), p.1093-1104
Main Authors: Sai, Hitoshi, Sato, Yoshiki, Oku, Toshiki, Matsui, Takuya
Format: Article
Language:English
Subjects:
Absorbers
amorphous silicon
Crystal structure
crystalline silicon
Crystallinity
Efficiency
Energy conversion efficiency
heterojunction
High temperature
Numerical prediction
Open circuit voltage
Operating temperature
Optimization
Photovoltaic cells
Silicon
Solar cells
Temperature
temperature coefficien0074
Temperature dependence
Thickness
thin
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Summary:In general, the conversion efficiency of solar cells decreases with the increase in temperature. This temperature dependence is mitigated by enhancing the open circuit voltage (VOC). Given a solar cell, its VOC can be enhanced by several routes, for example, reducing the defect density within the absorber, applying passivating contacts, and reducing the absorber thickness. In this work, we investigate the impact of wafer thickness in crystalline silicon (c‐Si) solar cells from the viewpoint of the photovoltaic performance at elevated temperatures. It is confirmed experimentally that the VOC of c‐Si solar cells increases by thinning the Si wafer, for example, VOC ≥ 0.75 V is obtained at a wafer thickness of
ISSN:1062-7995
1099-159X
DOI:10.1002/pip.3443