https://doi.org/10.1051/epjpv/2012011
Zn(O, S) layers for chalcoyprite solar cells sputtered from a single target
1
Helmholtz-Zentrum Berlin für Materialien und
Energie, Hahn-Meitner-Platz
1, 14109
Berlin,
Germany
2
Bosch Solar CISTech, Münstersche Str. 24, 14772
Brandenburg an der Havel,
Germany
a e-mail: klenk@helmholtz-berlin.de
Received:
30
April
2012
Accepted:
19
July
2012
Published online:
17
September
2012
A simplified Cu(In, Ga)(S, Se)2/Zn(O, S)/ZnO:Al stack for chalcopyrite thin-film solar cells is proposed. In this stack the Zn(O, S) layer combines the roles of the traditional CdS buffer and undoped ZnO layers. It will be shown that Zn(O, S) films can be sputtered in argon atmosphere from a single mixed target without substrate heating. The photovoltaic performance of the simplified stack matches that of the conventional approach. Replacing the ZnO target with a ZnO/ZnS target may therefore be sufficient to omit the CdS buffer layer and avoid the associated complexity, safety and recycling issues, and to lower production cost.
© Owned by the authors, published by EDP Sciences, 2012
This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial License 3.0, which permits unrestricted use, distribution, and reproduction in any noncommercial medium, provided the original work is properly cited.
