Periodic and Random Substrate Textures for Liquid-Phase Crystallized Silicon Thin-Film Solar Cells

Journal article (2017)

Authors

Grit Koppel Helmholtz-Zentrum Berlin
D. Amkreutz Helmholtz-Zentrum Berlin
P. Sonntag Helmholtz-Zentrum Berlin
Guangtao Yang Photovoltaic Materials and Devices
René A.C.M.M. van Swaaij Photovoltaic Materials and Devices
Olindo Isabella Photovoltaic Materials and Devices
M Zeman Electrical Sustainable Energy
B. Rech Helmholtz-Zentrum Berlin
C. Becker Helmholtz-Zentrum Berlin
Research Group
Photovoltaic Materials and Devices
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Published Date

2017

Language

English

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Research Group

Photovoltaic Materials and Devices

Abstract

A major limitation in current liquid-phase crystallized (LPC) silicon thin-film record solar cells is optical losses caused by their planar glass-silicon interface. In this study, silicon is grown on nanoimprinted periodically, as well as randomly textured glass substrates, and successfully implemented into state-of-the-art LPC silicon thin-film solar cells. Compared with an optimized planar reference device, both textures enhance absorption of light. Interlayer and process optimization allowed achieving a material quality comparable with the planar reference device. On the random texture, an open-circuit voltage above 630 mV was obtained, as well as an external quantum efficiency exceeding the planar reference device by +3 mA/cm2.

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