Photoconductive enhancement of single ZnO nanowire through localized Schottky effects

Ming Wei Chen, Cheng Ying Chen, Der Hsien Lien, Yong Ding, Jr Hau He*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

104 Scopus citations


We demonstrated the Au nanoparticle (NP) decoration as an effective way to enhance both photocurrent and photoconductive gain of single ZnO nanowire (NW) photodetectors (PDs) through localized Schottky effects. The enhancement is caused by the enhanced space charge effect due to the existence of the localized Schottky junctions under opencircuit conditions at the NW surfaces, leading to a more pronounced electron-hole separation effect. Since the band-bending under illumination varies relatively small for an Au NP-decorated ZnO NW, the decay of gain is less prominent with increased excitation power, demonstrating the feasibility for a PD to maintain a high gain under high-power illumination.

Original languageEnglish (US)
Pages (from-to)14836-14841
Number of pages6
JournalOptics Express
Issue number14
StatePublished - Jul 5 2010
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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