Photoconductive enhancement of single ZnO nanowire through localized Schottky effects

Optics Express
Ming-Wei ChenJr-Hau He

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.

References

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Citations

Aug 24, 2011·Nanoscale Research Letters·Soumen Dhara, Pk Giri
Jul 23, 2013·Nanoscale Research Letters·Cheng-Hsiang KuoWen-Chih Chang
May 21, 2014·ACS Nano·Wei Sea ChangYing-Hao Chu
Oct 25, 2012·ACS Nano·Cheng-Ying ChenJr-Hau He
Dec 7, 2011·Nano Letters·F González-PosadaE Monroy
Apr 7, 2017·Optics Express·Qiuguo LiSheng Chu
Nov 19, 2015·Nanoscale·Der-Hsien LienJr-Hau He
Oct 29, 2015·Advanced Materials·Xun HanZhong Lin Wang
Sep 26, 2013·Nanotechnology·Bogdan BercuChristophe Couteau
Apr 12, 2013·Nanoscale·Ritun ChakrabortyRoman Krahne
Feb 15, 2012·Optics Express·Cheng-Ying ChenJr-Hau He

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