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Improved Blue Response of Amorphous Silicon Alloy Solar Cells

Published online by Cambridge University Press:  25 February 2011

A. Banerjee  and
S. Guha
A. Banerjee
Affiliation:
Energy Conversion Devices, Inc., 1675 West Maple Road, Troy, MI 48084
S. Guha
Affiliation:
Energy Conversion Devices, Inc., 1675 West Maple Road, Troy, MI 48084
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Abstract

A two-layer MgF2/ITO antireflection (AR) coating has been used to reduce the reflection losses from the surface of a hydrogenated amorphous silicon alloy solar cell. This has resulted in a higher efficiency device primarily due to an improved blue response. The relative thicknesses of the MgF2 and ITO layers have been tailored to give the highest overall quantum efficiency (Q) values, which are higher than that obtained with a single-layer antireflection coating. Typically, the 0 value at 400 nm (Q400) has been increased from 0.58 to 0.68 for a single a:SiH cell. Incorporation of the double-layer AR coating in conjunction with μc-SiC p-layer has yielded Q400 value of 0.77. The total current density obtained by adding the individual contribution of the component cells of a dual bandgap triple amorphous silicon alloy solar cell has been increased from 21.90 to 23.27 mA/cm2 using the double-layer AR coating.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 192: Symposium O – Amorphous Silicon Technology - 1990 , 1990 , 57
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

Guha, S. in Advances in High-Efficiency. Multi-Gap. Multifunction Amorphous Silicon-Based Alloy Thin-Film Solar Cells, edited Madan, A., Thomson, M., Taylor, P. C., Hamakawa, Y., And Lecomber, P. G. (Mater. Res. Soc. Proc. 149, San Diego, CA 1989) pp. 405–415.Google Scholar
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