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Modulated surface-textured substrates with high haze for thin-film silicon solar cells

Published online by Cambridge University Press:  27 June 2011

O. Isabella ,
P. Liu ,
B. Bolman ,
J. Krč  and
M. Zeman
O. Isabella
Affiliation:
Delft University of Technology, EEC Unit / DIMES, 2600 GB Delft, The Netherlands
P. Liu
Affiliation:
Delft University of Technology, EEC Unit / DIMES, 2600 GB Delft, The Netherlands
B. Bolman
Affiliation:
Delft University of Technology, EEC Unit / DIMES, 2600 GB Delft, The Netherlands
J. Krč
Affiliation:
University of Ljubljana, Faculty of Electrical Engineering, SI-1000 Ljubljana, Slovenia
M. Zeman
Affiliation:
Delft University of Technology, EEC Unit / DIMES, 2600 GB Delft, The Netherlands
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Abstract

Modulated surface-textured substrates for thin-film silicon solar cells exhibiting high haze in a broad range of wavelengths were fabricated. Glass substrates coated with different thicknesses of a sacrificial layer were wet-etched allowing the manipulation of the surface morphology with surface roughness ranging from 200 nm up to 1000 nm. Subsequently, zinc-oxide layers were sputtered and then wet-etched constituting the final modulated textures. The morphological analysis of the substrates demonstrated the surface modulation, and the optical analysis revealed broad angle intensity distributions and high hazes. A small anti-reflective effect with respect to untreated glass was found for etched glass samples. The performance of solar cells on high-haze substrates was evaluated. The solar cells outperformed the reference cell fabricated on a randomly-textured zinc-oxide-coated flat glass. The trend in the efficiency resembled the increased surface roughness and the anti-reflective effect was confirmed also in solar cell devices.

Keywords

photovoltaicscanning electron microscopy (SEM)optoelectronic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1321: Symposium A – Amorphous and Polycrystalline Thin-Film Silicon Science and Technology , 2011 , mrss11-1321-a17-04
Copyright
Copyright © Materials Research Society 2011

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References

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