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

doi:10.1109/INEC.2010.5424964

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 proceeding › Conference contribution › peer-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 language	English (US)
Title of host publication	INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings
Pages	1181-1182
Number of pages	2
DOIs	https://doi.org/10.1109/INEC.2010.5424964
State	Published - 2010
Externally published	Yes
Event	2010 3rd International Nanoelectronics Conference, INEC 2010 - Hongkong, China Duration: Jan 3 2010 → Jan 8 2010

Other

Other	2010 3rd International Nanoelectronics Conference, INEC 2010
Country/Territory	China
City	Hongkong
Period	01/3/10 → 01/8/10

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/INEC.2010.5424964

Cite this

@inproceedings{3112cc873b324c3d8279b57b976e3453,

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

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.",

author = "Chen, {Ming Wei} and Chen, {G. Ying} and He, {Jr Hau}",

year = "2010",

doi = "10.1109/INEC.2010.5424964",

language = "English (US)",

isbn = "9781424435449",

pages = "1181--1182",

booktitle = "INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings",

note = "2010 3rd International Nanoelectronics Conference, INEC 2010 ; Conference date: 03-01-2010 Through 08-01-2010",

}

Chen, MW, Chen, GY & He, JH 2010, Photoconductive enhancement of Au nanoparticles-decorated single ZnO nanowire photodetector through formation of local schottky junction. in INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings., 5424964, pp. 1181-1182, 2010 3rd International Nanoelectronics Conference, INEC 2010, Hongkong, China, 01/3/10. https://doi.org/10.1109/INEC.2010.5424964

Photoconductive enhancement of Au nanoparticles-decorated single ZnO nanowire photodetector through formation of local schottky junction. / Chen, Ming Wei; Chen, G. Ying; He, Jr Hau.

INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings. 2010. p. 1181-1182 5424964.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Photoconductive enhancement of Au nanoparticles-decorated single ZnO nanowire photodetector through formation of local schottky junction

AU - Chen, Ming Wei

AU - Chen, G. Ying

AU - He, Jr Hau

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

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U2 - 10.1109/INEC.2010.5424964

DO - 10.1109/INEC.2010.5424964

M3 - Conference contribution

AN - SCOPUS:77951657254

SN - 9781424435449

SP - 1181

EP - 1182

BT - INEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings

T2 - 2010 3rd International Nanoelectronics Conference, INEC 2010

Y2 - 3 January 2010 through 8 January 2010

ER -

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

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