Gigantic enhancement in response and reset time of ZnO UV nanosensor by utilizing Schottky contact and surface functionalization

被引：508

作者：

Zhou, Jun ^{[1
,2
]}

Gu, Yudong ^{[1
,3
]}

Hu, Youfan ^{[1
]}

Mai, Wenjie ^{[1
]}

Yeh, Ping-Hung ^{[1
]}

Bao, Gang ^{[2
]}

Sood, Ashok K. ^{[4
]}

Polla, Dennis L. ^{[5
]}

Wang, Zhong Lin ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Emory Univ, Dept Biomed Engn, Atlanta, GA 30332 USA

[3] Peking Univ, Coll Engn, Dept Adv Mat & Nanotechnol, Beijing 100084, Peoples R China

[4] Magnolia Opt Technol Inc, Woburn, MA 01801 USA

[5] DARPA MTO, Arlington, VA 22203 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 19期

关键词：

II-VI semiconductors; microsensors; nanotechnology; Schottky barriers; semiconductor quantum wires; ultraviolet detectors; wide band gap semiconductors; zinc compounds; ULTRAVIOLET PHOTODETECTORS;

D O I：

10.1063/1.3133358

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

UV response of ZnO nanowire nanosensor has been studied under ambient condition. By utilizing Schottky contact instead of Ohmic contact in device fabrication, the UV sensitivity of the nanosensor has been improved by four orders of magnitude, and the reset time has been drastically reduced from similar to 417 to similar to 0.8 s. By further surface functionalization with function polymers, the reset time has been reduced to similar to 20 ms even without correcting the electronic response of the measurement system. These results demonstrate an effective approach for building high response and fast reset UV detectors.

引用

页数：3

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