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Flexible and monolithically integrated CIGS-Modules

Published online by Cambridge University Press:  21 March 2011

F. Kessler,
K. Herz,
M. Powalla,
M. Hartmann,
M. Schmidt,
A. Jasenek and
H. W. Schock
F. Kessler
Affiliation:
Zentrum fuer Sonnenenergie- und Wasserstoff-Forschung (ZSW), Hessbruehlstrasse 21c, 70565 Stuttgart, Germany
K. Herz
Affiliation:
Zentrum fuer Sonnenenergie- und Wasserstoff-Forschung (ZSW), Hessbruehlstrasse 21c, 70565 Stuttgart, Germany
M. Powalla
Affiliation:
Zentrum fuer Sonnenenergie- und Wasserstoff-Forschung (ZSW), Hessbruehlstrasse 21c, 70565 Stuttgart, Germany
M. Hartmann
Affiliation:
Institut fuer Physikalische Elektronik, Universitaet Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany
M. Schmidt
Affiliation:
Institut fuer Physikalische Elektronik, Universitaet Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany
A. Jasenek
Affiliation:
Institut fuer Physikalische Elektronik, Universitaet Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany
H. W. Schock
Affiliation:
Institut fuer Physikalische Elektronik, Universitaet Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany
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Abstract

Monolithically integrated Cu(In,Ga)Se2-mini-modules (CIGS) have been fabricated on polymer as well as on metal foils. Preferred foils with view on costs and physical properties were ferritic steel, titanium, Fe/Ni-alloys (e.g. Kovar®) and polyimide as the only appropriate low temperature candidate. The metal substrates were isolated by multiple layers of SiOx and Al2O3 which served both as diffusion barrier against substrate elements and dielectric barrier. Small area cell efficiencies of 13.8% on ferritic steel foils and 10.6% on polymer foils (both without antireflective coating) were obtained. First monolithically integrated submodules of up to 10×10cm2 substrate area were fabricated both on ferritic steel and polyimide substrates. Different patterning methods have been applied and matched to the respective substrate materials.

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References

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