Registration Number
0222U001063,
0120U101362
, R & D reports
Title
Investigation of the features of cationic substitution in nanocrystals of quaternary metal chalcogenides - materials of the new generation of thin-film photovoltaics
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Head
Yukhymchuk Volodymyr O, Доктор фізико-математичних наук
Registration Date
23-01-2022
Organization
VE Lashkarev Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine
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Cationic (Cu to Ag) and anionic (S to Se) substitutions were performed to improve the structural and optical properties of Cu2ZnSnS4 quaternary chalcogenides, which are intended for use as active layers of photovoltaic cells. Nanocrystals of (AgxCu1-x)2ZnSnS4 (ACZTS) compounds were obtained by chemical synthesis, followed by the formation of thin (1 μm) films. Magnetron sputtering of the corresponding metals with subsequent annealing was used to form Cu2ZnSn(SxSe1-x)4 (CZTSSe) films. It was found that NC (Cu, Ag)-Zn-Sn-S obtained by colloidal synthesis is a combination of primary (ACZTS) and secondary Ag-Zn-S phases. The presence of the latter explains the non-monotonic dependence of the bandgap of the ACZTS NC on the Ag / Cu ratio. The correlation between the change of elemental composition, morphology, and Eg of Cu2ZnSn(SxSe1-x)4 films with variation x = S / (S + Se) is established.
Product Description
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2022-03-09
