Abstract
Cu2ZnSnSxSe4-x nanocrystallines have been synthesized via solvothermal route in ethylenediamine using CuCl, ZnCl2, SnCl4·5H2O, Se, and S powders as reaction reagents. The as-synthesized products were characterized by X-ray powder diffraction, transmission electron microscopy, and high-resolution transmission electron microscopy. The results confirm that the Cu2ZnSnSxSe4-x (0≤x ≤4) is a complete solid solution with single phase and uniform composition. The solid solutions Cu2ZnSnSxSe4-x (0< x <4) are single crystalline nanoplates with the diameter of 20–50 nm. Raman spectra of the Cu2ZnSnSxSe4-x nanocrystallines revealed that vibrating modes were modulated by x-values. Photoluminescence spectra of the as-prepared Cu2ZnSnSxSe4-x nanocrystallines showed that one wide emission band with peak position around 1.40 eV which slightly changed with x-values.
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