Solution-Processed 2D PbS Nanoplates with Residual Cu2S Exhibiting Low Resistivity and High Infrared Responsivity

摘要: We report the synthesis of colloidal 2D PbS nanoplates with residual Cu2S domains via a partial cation-exchange process involving Pb2+ and presynthesized hexagonal an average thickness ∼3 nm edge lengths ∼150 nm. Different from previously reported nanosheets whose basal planes are ±{100}PbS, our approach yields ±{111}PbS, which was theoretically predicted to have better surface ligand passivation. Subsequently, we found that showed improved stability did not suffer severe aggregation despite numerous solvent wash steps. further incorporated film into planar photodetector device lateral Au electrodes. The amount in nanoplates, can be tuned by adjusting reaction time process, play crucial role determining in-plane conductivity therefore its photodetection efficiency. For ...