Large-Scale Synthesis of Single Crystalline CuSb(SxSe1–x)2 Nanosheets with Tunable Composition

Alloying nanocrystals with multicomponent has been an effective way to tune the band gap of semiconductor nanocrystals, which promises their wide applications in optoelectronics, photovoltaics, etc. However, colloidal synthesis of homogeneous phase multicomponent nanocrystals in a large scale remains great challenge. Here, we declare the successful preparation of single-crystalline quaternary CuSb(SxSe1–x)2 nanosheets in a facile one-pot reaction with yield >3 g. The molar ratio of S/(S + Se) in CuSb(SxSe1–x)2 could be easily tuned from 1.5% to 13.7% by increasing the reaction temperature which enhances the reactivity of S source in the reaction, and accordingly, the band gap of the obtained CuSb(SxSe1–x)2 varies from 0.9 to 1.1 eV.