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Influence of Cu(In,Ga)Se2 grain orientation on solution growth of Zn(O,S) and CdS

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3 Author(s)
Witte, W. ; Zentrum fur Sonnenenergie- und Wasserstoff-Forschung Baden-Wurttemberg (ZSW), Stuttgart, Germany ; Abou-Ras, D. ; Hariskos, D.

Thin films grown by chemical bath deposition (CBD) are the most commonly used buffers layers for Cu(In,Ga)Se2 (CIGS) thin-film solar cells. CIGS record devices employ CBD CdS or CBD Zn(O,S) buffers for small-area cells and even large-area modules. The present contribution discusses CBD buffer growth on polycrystalline CIGS films deposited by co-evaporation. We report a correlation between coverage of CBD films and CIGS grain orientation as determined with electron backscatter diffraction. The {11 2} planes of CIGS grains are sparsely covered with the CBD films whereas on <;100>;/<;001>; oriented CIGS grains we found a very dense coverage of the CIGS surface.

Published in:

Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE

Date of Conference:

3-8 June 2012