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Title: Graphene/CdTe heterostructure solar cell and its enhancement with photo-induced doping

We report a type of solar cell based on graphene/CdTe Schottky heterostructure, which can be improved by surface engineering as graphene is 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 3.10%. Photo-induced doping is mainly accounted for this enhancement, as evidenced by field effect transport, Raman, photoluminescence, and quantum efficiency measurements. This work demonstrates a feasible way of improving the performance of graphene/semiconductor heterostructure solar cells by combining one dimensional with two dimensional materials.
Authors:
;  [1] ;  [2] ; ; ; ; ; ;  [1]
  1. Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22486031
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CADMIUM SELENIDES; CADMIUM TELLURIDES; GRAPHENE; PHOTOLUMINESCENCE; QUANTUM DOTS; QUANTUM EFFICIENCY; SOLAR CELLS; TWO-DIMENSIONAL SYSTEMS