Graphene/ZnO nanowire/graphene vertical structure based fast-response ultraviolet photodetector

被引：195

作者：

Fu, Xue-Wen ^{[1
]}

Liao, Zhi-Min ^{[1
]}

Zhou, Yang-Bo ^{[1
]}

Wu, Han-Chun ^{[2
,3
]}

Bie, Ya-Qing ^{[1
]}

Xu, Jun ^{[1
]}

Yu, Da-Peng ^{[1
]}

机构：

[1] Peking Univ, Dept Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[2] Trinity Coll Dublin, CRANN, Dublin 2, Ireland

[3] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 22期

关键词：

This work was supported by MOST (Nos. 2012CB933401 and 2009CB623703) and the Sino Swiss Science and Technology Cooperation Program (2010DFA01810);

D O I：

10.1063/1.4724208

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the high performance vertical ultraviolet (UV) photodetectors based on single ZnO nanowire (NW) sandwiched between two graphene sheets. The photocurrent on-off ratio, rising time, and recovery speed of our UV detectors are 8 x 10(2), 0.7 s, and 0.5 s, respectively, which are significantly improved compared to the conventional ZnO NWs photodetectors. The improved performance is attributed to the existence of Schottky barriers between ZnO NW and graphene electrodes. The graphene/ZnO NW/graphene vertical sandwiched structures may be promising candidates for integrated optoelectronic sensor devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4724208]

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