Open-circuit voltage (Voc) of 960 mV on chalcopyrite solar cell was achieved by pure-sulfide Cu(In,Ga)S2solar cell. Generally, high-performance Cu(In,Ga)S2needs KCN-etching treatment to remove CuS layer; however, we were able to fabricate it without KCN-etching treatment. Our champion puresulfide Cu(In,Ga)S2cell demonstrated the efficiency of 14.0%. In this paper, the latest results for high-performance pure-sulfide Cu(In,Ga)S2cells will be presented.
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Hiroi et al. (2015) studied this question.
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