Colloidal quantum dots of fully-inorganic cesium lead halide perovskites for photovoltaic applications
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초록
내용
Colloidal quantum dots (CQDs) of fully-inorganic cesium lead halide have excellent optical, electrical and optoelectronic properties revealing in bulk perovskites as well as originating from the quantum-size effects. These are receiving much attention as a photoactive material in optoelectronic applications of both solar cells and light-emitting devices because of their simultaneously outstanding energy harvesting and light-emitting features. It has been reported that CsPbI3-QDs are used as a photovoltaic absorber showing the best performance in CQD solar cells. In addition, CsPbI3-QD solar cells show the electroluminescence (EL), indicating that CsPbI3-QDs can simultaneously reveal dual functions within a single device. Here, we demonstrate that the photovoltaic performance of CsPbI3- and CsPbBr3-QD solar cells can be improved by designing the surface ligand manipulations of CsPbI3-QDs.