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Impact of the deposition conditions of window layers on lowering the metastability effects in Cu(In,Ga)Se2/CBD ZnS-based solar cell

Published online by Cambridge University Press:  21 August 2013

N. Naghavi ,
T. Hildebrandt ,
G. Renou ,
S. Temgoua ,
JF. Guillemoles  and
D. Lincot
N. Naghavi
Affiliation:
Institute of Research and Development on Photovoltaic Energy (IRDEP), 6 quai Watier, 78401 Chatou, France
T. Hildebrandt
Affiliation:
Institute of Research and Development on Photovoltaic Energy (IRDEP), 6 quai Watier, 78401 Chatou, France
G. Renou
Affiliation:
Institute of Research and Development on Photovoltaic Energy (IRDEP), 6 quai Watier, 78401 Chatou, France
S. Temgoua
Affiliation:
Institute of Research and Development on Photovoltaic Energy (IRDEP), 6 quai Watier, 78401 Chatou, France
JF. Guillemoles
Affiliation:
Institute of Research and Development on Photovoltaic Energy (IRDEP), 6 quai Watier, 78401 Chatou, France
D. Lincot
Affiliation:
Institute of Research and Development on Photovoltaic Energy (IRDEP), 6 quai Watier, 78401 Chatou, France
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Abstract

The purpose of the present paper is to focus on the impact of oxygen gas partial pressure during the sputtering of i-ZnO and ZnMgO on the transient behavior of solar cells parameters when a CBD-ZnS buffer layer is used. Based on electrical characterization of cells, we have observed that the effect of light-soaking is different on J-V characteristics depending on the quantity of oxygen present during the first deposition time of the i-ZnO or ZnMgO layers. In fact, we have noticed that, when cells are prepared with standard i-ZnO, the efficiencies are very low and a pronounced transient behavior is observed. However, when the i-ZnO or ZnMgO is first formed by a few nanometers sputtered layer without any additive oxygen, depending on the thickness of this layer, the transient effects strongly decrease. It is then possible to reach efficiencies quite similar to the CdS reference cells, especially with ZnMgO, without any post-treatments.

Keywords

photovoltaicsurface chemistryelectrical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1538: Symposium C – Compound Semiconductors: Thin-Film Photovoltaics, LEDs and Smart Energy Controls , 2013 , pp. 145 - 149
Copyright
Copyright © Materials Research Society 2013 

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References

REFERENCES

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