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Enhanced Light Absorption in a-Si:H Layers of Solar Cells by Applying Tco/Metal Back Contacts

Published online by Cambridge University Press:  01 January 1993

G. Tao ,
B.S. Girwar ,
G.E.N. Landweer ,
M. Zeman  and
J.W. Metselaar
G. Tao
Affiliation:
Delft University of Technology, P.O.Box 5031, 2600 GA Delft, the Netherlands
B.S. Girwar
Affiliation:
Delft University of Technology, P.O.Box 5031, 2600 GA Delft, the Netherlands
G.E.N. Landweer
Affiliation:
Delft University of Technology, P.O.Box 5031, 2600 GA Delft, the Netherlands
M. Zeman
Affiliation:
Delft University of Technology, P.O.Box 5031, 2600 GA Delft, the Netherlands
J.W. Metselaar
Affiliation:
Delft University of Technology, P.O.Box 5031, 2600 GA Delft, the Netherlands
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Abstract

The optimization of the back contact reflectivity for thin film a-Si:H solar cells has been performed. The results of optical calculations show that a-Si:H/TCO/Metal interfaces with a proper TCO thickness reflect much more than their a-Si:H/Metal counterparts. We compared solar cells which were deposited on a flat substrate with different back contacts. The back contacts consisted of a metal layer (aluminum, silver/aluminum) or combined TCO/metal layers (TCO/Al, TCO/Ag/Al). The same was done with solar cells which were deposited on a textured substrate. The solar cells with a TCO/metal back contact showed not only a significantly increased short-circuit current density but also an increase in the spectral response. The cells with TCO/Ag/Al back contact showed the best result.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 297: Symposium A – Amorphous Silicon Technology - 1993 , 1993 , 845
Copyright
Copyright © Materials Research Society 1993

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References

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