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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 14 — Jul. 5, 2010
  • pp: 14836–14841

Photoconductive enhancement of single ZnO nanowire through localized Schottky effects

Ming-Wei Chen, Cheng-Ying Chen, Der-Hsien Lien, Yong Ding, and Jr-Hau He  »View Author Affiliations


Optics Express, Vol. 18, Issue 14, pp. 14836-14841 (2010)
http://dx.doi.org/10.1364/OE.18.014836


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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 open-circuit 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.

© 2010 OSA

OCIS Codes
(000.2700) General : General science

ToC Category:
Detectors

History
Original Manuscript: April 21, 2010
Revised Manuscript: June 17, 2010
Manuscript Accepted: June 22, 2010
Published: June 28, 2010

Citation
Ming-Wei Chen, Cheng-Ying Chen, Der-Hsien Lien, Yong Ding, and Jr-Hau He, "Photoconductive enhancement of single ZnO nanowire through localized Schottky effects," Opt. Express 18, 14836-14841 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-14-14836


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