- Understanding charge transfer at PbS-decorated graphene surfaces toward a tunable photosensor.
Understanding charge transfer at PbS-decorated graphene surfaces toward a tunable photosensor.
Advanced materials (Deerfield Beach, Fla.) (2012-04-17)
Dayong Zhang, Lin Gan, Yang Cao, Qing Wang, Limin Qi, Xuefeng Guo
PMID22505476
ABSTRACT
An intrinsic mechanism of photoinduced hole transfer reactions occurring at the grapheme-PbS interface is described with the purpose of building a tunable photosensor with a responsivity of more than 10(3) A W(-1) . It is remarkable that rational utilization of this finding also realizes symmetric, opposing photoswitching effects, which are effectively mirror images, in a single pristine graphene device. These results highlight the vital importance of interface modification as a powerful tool for creating future ultrasensitive optoelectronic devices.
MATERIALS