Abstract

AbstractThe effects of the immersion into a NH3 aqueous solution on the structural characteristics of the chemically deposited Zn(S,O,OH) layer and photovoltaic performance of the CIGS/Zn(S,O,OH) solar cells were investigated with structural and electrical characterizations. The as‐deposited‐Zn(S,O,OH) layer possessed a layered structure of upper Zn(OH)2 and Zn(S,O) layers, and the upper Zn(OH)2 layer was removed by the immersion. The conversion efficiency for the CIGS solar cell was improved from 6.8% to 13.7% by removing the upper Zn(OH)2 layer during the immersion. Copyright © 2015 John Wiley & Sons, Ltd.

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