Article Title

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

Authors

Ping Wang, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Tengfei Jiang, College of Chemistry, Jilin University, Changchun 130012, China
Chengzhou Zhu, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Yueming Zhai, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Dejun Wang, College of Chemistry, Jilin University, Changchun 130012, China
Shaojun Dong, State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Keywords

Graphene, CdS, ZnS, quantum dots, charge transfer, photovoltaic

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.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-010-0046-0

Publisher

Tsinghua University Press

Recommended Citation

Ping Wang,Tengfei Jiang,Chengzhou Zhu,Yueming Zhai,Dejun Wang,Shaojun Dong, One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties. NanoRes.2010, 3(11): 794–799