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

93 Scopus citations

Abstract

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
Pages (from-to)14836-14841
Number of pages6
JournalOptics Express
Volume18
Issue number14
DOIs
StatePublished - 5 Jul 2010

Fingerprint Dive into the research topics of 'Photoconductive enhancement of single ZnO nanowire through localized Schottky effects'. Together they form a unique fingerprint.

Cite this