Nano Research

, Volume 3, Issue 11, pp 794–799

One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties

  • Ping Wang
  • Tengfei Jiang
  • Chengzhou Zhu
  • Yueming Zhai
  • Dejun Wang
  • Shaojun Dong
Open Access
Research Article

Abstract

The synthesis of graphene-semiconductor nanocomposites has attracted increasing attention due to their interesting optoelectronic properties. However the synthesis of such nanocomposites, with decorated particles well dispersed on graphene, is still a great challenge. This work reports a facile, one-step, solvothermal method for the synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites directly from graphene oxide, with CdS and ZnS very well dispersed on the graphene nanosheets. Photoluminescence measurements showed that the integration of CdS and ZnS with graphene significantly decreases their photoluminescence. Transient photovoltage studies revealed that the graphene-CdS nanocomposite exhibits a very unexpected strong positive photovoltaic response, while separate samples of graphene and CdS quantum dots (QDs) of a similar size do not show any photovoltaic response.

Keywords

Graphene CdS ZnS quantum dots charge transfer photovoltaic 

Supplementary material

12274_2010_46_MOESM1_ESM.pdf (1.1 mb)
Supplementary material, approximately 605 KB.

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Ping Wang
    • 1
  • Tengfei Jiang
    • 2
  • Chengzhou Zhu
    • 1
  • Yueming Zhai
    • 1
  • Dejun Wang
    • 2
  • Shaojun Dong
    • 1
  1. 1.State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunChina
  2. 2.College of ChemistryJilin UniversityChangchunChina

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