Oxygen-assisted charge transfer between ZnO quantum dots and graphene

Wenhao Guo; Shuigang Xu; Zefei Wu; Ning Wang; M M T Loy; Shengwang Du

doi:10.1002/smll.201202855

Oxygen-assisted charge transfer between ZnO quantum dots and graphene

Small. 2013 Sep 23;9(18):3031-6. doi: 10.1002/smll.201202855. Epub 2013 Mar 21.

Authors

Wenhao Guo¹, Shuigang Xu, Zefei Wu, Ning Wang, M M T Loy, Shengwang Du

Affiliation

¹ Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.

PMID: 23520196
DOI: 10.1002/smll.201202855

Abstract

Efficient charge transfer between ZnO quantum dots (QDs) and graphene is demonstrated by decorating ZnO QDs on top of graphene, with the assistance of oxygen molecules from the air. The electrical response of the device to UV light is greatly enhanced, and a photoconductive gain of up to 10(7) can be obtained.

Keywords: ZnO; charge transfer; graphene; oxygen; quantum dots.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Graphite / chemistry*
Oxygen / chemistry*
Quantum Dots / chemistry*
Zinc Oxide / chemistry*

Substances

Graphite
Oxygen
Zinc Oxide