We report a type of solar cells based on graphene/CdTe Schottky heterostructure, which can be improved by surface engineering as graphene is one-atomic thin. By coating a layer of ultrathin CdSe quantum dots onto graphene/CdTe heterostructure, the power conversion efficiency is increased from 2.08% to 3.1%. Photo-induced doping is mainly accounted for this enhancement, as evidenced by transport, photoluminescence and quantum efficiency measurements. This work demonstrates a feasible way of designing solar cells with incorporating one dimensional and two dimensional materials.
@article{arxiv.1505.01244,
title = {Semiconductor quantum dots enhanced graphene/CdTe heterostructure solar cells by photo-induced doping},
author = {Xiaoqiang Li and Shengjiao Zhang and Peng Wang and Zhijuan Xu and Huikai Zhong and Zhiqian Wu and Shisheng Lin},
journal= {arXiv preprint arXiv:1505.01244},
year = {2015}
}