Luminescent solar concentrator (LSC) incorporated with quantum dots (QDs) have been widely regarded as one of the most important development trends of cost-effective solar energy. In this study, for the first time we report a new QDs-LSC integrated with heavy metal free CuInS₂/ZnS core/shell QDs with large Stokes shift and high optical efficiency. The as-prepared CuInS₂/ZnS QDs possess advantages of high photoluminescence quantum yield of 81% and large Stocks shift more than 150 nm. The optical efficiency of CuInS₂/ZnS QDs-LSC reaches as high as 26.5%. Moreover, the power conversion efficiency of the QDs-LSC-PV device reaches more than 3 folds to that of pure PMMA-PV device. Furthermore, the PV device is able to harvest 4.91 folds solar energy with the assistance of this new CuInS₂/ZnS QDs-LSC for the same size c-Si PV cell. The results demonstrate that this new CuInS₂/ZnS QDs-LSC provides a promising way for the high efficiency, nonhazardous and low cost solar energy.

The polarization property of CsPbX₃ perovskites have been observed and studied systematically in this paper.