| 초록 |
All-inorganic metal lead halide perovskite quantum dots (CsPbX3, X: Cl, Br, or I) operate successfully in various optoelectronic devices, such as solar cells, LEDs, photocatalysis, lasing, and so on. In the devices, the perovskite quantum dots work under electrochemical bias and/or illumination with charge separation/collection by interacting with charge transport medium. In-situ spectroelectrochemical tool provides quantitative insights about the spectroelectrochemical behaviors of the CsPbBr3 and CsPbI3 perovskite quantum dots. We found that the perovskite quantum dots did transformation to precursor state of plumbate complexes under electrochemical reaction control. We concluded that hole mediate electrochemical oxidation of the perovskite quantum dot impacts the irreversible transformation. Understanding such charge transfer mediated process could provide the way to develop practical strategy for utilization of the quantum dots. |
