Graphene oxide wrapped CH3NH3PbBr3 perovskite quantum dots hybrid for photoelectrochemical CO2 reduction in organic solvents

Abstract Lead halide perovskite have primarily considered as photovoltaic materials for luminescent materials and optoelectronic devices. However, lead halide perovskite is assumed to be unsuitable for photoelectrochemical conversion due to the instability in humid environment or polar solvents. Here, we report graphene oxide (GO) wrapped organic-inorganic lead halide perovskite quantum dots (GO/CH 3 NH 3 PbBr 3 hybrid) for photoelectrochemical conversion CO 2 into solar fuels in nonaqueous media. Graphene oxide can protect CH 3 NH 3 PbBr 3 QDs from erosion by organic solvent, and also serve as electron transport medium to separate photoinduced electrons and holes. Therefore, a photocurrent increase by ca. 200% can be obtained in the GO/CH 3 NH 3 PbBr 3 hybrid due to improved electron extraction and transport. The GO/CH 3 NH 3 PbBr 3 electrode exhibits an effective CO 2 reduction capacity to CO, yielding 1.05 μmol cm −2  h −1 .