Oxygen-Assisted Charge Transfer Between ZnO Quantum Dots and Graphene

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 107 can be...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2013-09, Vol.9 (18), p.3031-3036
Main Authors: Guo, Wenhao, Xu, Shuigang, Wu, Zefei, Wang, Ning, Loy, M. M. T., Du, Shengwang
Format: Article
Language:English
Subjects:
Charge transfer
Decoration
Devices
Gain
Graphene
Graphite - chemistry
Nanotechnology
oxygen
Oxygen - chemistry
Quantum dots
Quantum Dots - chemistry
Zinc oxide
Zinc Oxide - chemistry
ZnO
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Summary: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 107 can be obtained.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201202855