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Influence of chemical bath deposition parameters on the formation of CuInS2 / Zn(Se,O) junctions for thin film solar cells

Published online by Cambridge University Press:  21 March 2011

A.M. Chaparro ,
M.T. Gutiérrez ,
J. Herrero  and
J. Klaer
A.M. Chaparro
Affiliation:
Dep.Energías Renovables. CIEMAT. Avda. Complutense, 22 28040-Madrid (Spain)
M.T. Gutiérrez
Affiliation:
Dep.Energías Renovables. CIEMAT. Avda. Complutense, 22 28040-Madrid (Spain)
J. Herrero
Affiliation:
Dep.Energías Renovables. CIEMAT. Avda. Complutense, 22 28040-Madrid (Spain)
J. Klaer
Affiliation:
Hahn-Meitner-Institut (SE3). Glienicker Str. 100, 14109 Berlin (Germany)
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Abstract

Thin film solar cells of CuInS2/Zn(Se,O)/ZnO configuration have been studied as a function of the Zn(Se,O) buffer layer deposition parameters. Deposition of the buffer films was carried out by the chemical bath deposition (CBD) method, at different bath temperatures and compositions, and followed in situ with a quartz crystal microbalance. The CBD conditions were chosen to grow Zn(Se,O) buffer layers under different kinetic regimes but maintaining the same buffer thickness. The cells have been characterised with current-voltage and quantum efficiency measurements. Light soaking effects and medium term stability have been checked. It is found that Zn(Se,O) grown under predominant electroless kinetics gives rise to buffer films richer in oxygen, which allow for higher fill factors, higher efficiencies (around 10%) and stability of the cells. These cells show however lower open circuit potential. On the other hand, Zn(Se,O) buffers grown under chemical regime become richer in selenium, which gives rise to cells with higher open circuit potential, but lower fill factor, conversion efficiency and stability. Light soaking effects are also more important with the chemically grown buffers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 668: Symposium H – II-IV Compound Semiconductor Photovoltaic Materials , 2001 , H2.9
Copyright
Copyright © Materials Research Society 2001

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References

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