Photoconductive enhancement of Au nanoparticles-decorated single ZnO nanowire photodetector through formation of local schottky junction

Ming Wei Chen, G. Ying Chen, Jr Hau He*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A single ZnO nanowire (NW) photodetector was fabricated and measured under different excitation intensities. The photoconductive internal gain was decreased as the excitation intensity was increased, indicating the hole-trapping photoconduction mechanism of ZnO NWs. As Au nanoparticles are decorated at the surface of a ZnO NW, the local space charge region is formed due to the existence of Schottky junction. This enhancement of the surface electric field results in more pronounced electron-hole separation effect, which then prolongs the lifetime of photogenerated electron and consequently increases the photocurrent. This study provides an easy way to enhance the sensitivity of photodetectors.

Original languageEnglish (US)
Title of host publicationINEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings
Pages1181-1182
Number of pages2
DOIs
StatePublished - 2010
Externally publishedYes
Event2010 3rd International Nanoelectronics Conference, INEC 2010 - Hongkong, China
Duration: Jan 3 2010Jan 8 2010

Other

Other2010 3rd International Nanoelectronics Conference, INEC 2010
CountryChina
CityHongkong
Period01/3/1001/8/10

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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