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(영남대학교) (영남대학교) (영남대학교) (영남대학교) (영남대학교)
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한국태양광발전학회 Current Photovoltaic Research Current Photovoltaic Research Vol.9 No.4
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    초록·키워드

    In this study, the microstructure of the CVD-fabricated Cu(In,Ga)Se₂ (CIGSe) absorber layer by simulating the stacking sequence used in a co-evaporation method, and changes solar cell performance were investigated. The absorber layer prepared by stacking CuSe and (In,Ga)Se between InSe is separated into Ga-free CuInSe₂ and Ga-rich CIGSe, and transformed to CIGSe by selenization heat treatment with slight improvement in the the solar cell efficiency. However, in CVD, since the supply of liquid Cu-Se is not as active as in the co-evaporation method, the nanoocrystalline layer containing a large amount of Ga remained independently in the absorption layer, which acted as a cause of the loss of J<SUB>SC</SUB> and FF. Therefore, by using a precursor structure in which CuGa is sputter-deposited on a single layer of InSe deposited by CVD, performance parameters of V<SUB>OC</SUB>, J<SUB>SC</SUB>, and FF could be greatly improved.

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      UCI(KEPA) : I410-ECN-0101-2022-530-000103814