Photoconductive enhancement of single ZnO nanowire through localized Schottky effects

被引：101

作者：

Chen, Ming-Wei ^{[1
,2
]}

Chen, Cheng-Ying ^{[1
,2
]}

Lien, Der-Hsien ^{[3
]}

Ding, Yong ^{[3
]}

He, Jr-Hau ^{[1
,2
]}

机构：

[1] Natl Taiwan Univ, Inst Photon & Optoelect, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Dept Elect Engn, Taipei 10617, Taiwan

[3] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 14期

关键词：

SNO2; NANOWIRES; NANOBELTS; PHOTODETECTORS; CONTACTS; SURFACE;

D O I：

10.1364/OE.18.014836

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2010 Optical Society of America

引用

页码：14836 / 14841

页数：6

共 31 条

[1] Enhanced photoresponse in ZnO nanowires decorated with CdTe quantum dot [J].

Aga, R. S., Jr. ;

Jowhar, D. ;

Ueda, A. ;

Pan, Z. ;

Collins, W. E. ;

Mu, R. ;

Singer, K. D. ;

Shen, J. .

APPLIED PHYSICS LETTERS, 2007, 91 (23)

[2] Highly sensitive ZnO nanowire CO sensors with the adsorption of Au nanoparticles [J].

Chang, Shoou-Jinn ;

Hsueh, Ting-Jen ;

Chen, I-Cherng ;

Huang, Bohr-Ran .

NANOTECHNOLOGY, 2008, 19 (17)

[3] ZnO/Al2O3 core-shell nanorod arrays: growth, structural characterization, and luminescent properties [J].

Chen, C. Y. ;

Lin, C. A. ;

Chen, M. J. ;

Lin, G. R. ;

He, J. H. .

NANOTECHNOLOGY, 2009, 20 (18)

[4] Nano Au-decorated boron nitride nanotubes: Conductance modification and field-emission enhancement [J].

Chen, Hua ;

Zhang, Hongzhou ;

Fu, Lan ;

Chen, Ying ;

Williams, James S. ;

Yu, Chao ;

Yu, Dapeng .

APPLIED PHYSICS LETTERS, 2008, 92 (24)

[5] Gold Schottky contacts on oxygen plasma-treated, n-type ZnO(000(1)over-bar) [J].

Coppa, BJ ;

Davis, RF ;

Nemanich, RJ .

APPLIED PHYSICS LETTERS, 2003, 82 (03) :400-402

[6] ZnO subwavelength wires for fast-response mid-infrared detection [J].

Dai, Wei ;

Yang, Qing ;

Gu, Fuxing ;

Tong, Limin .

OPTICS EXPRESS, 2009, 17 (24) :21808-21812

[7] Principles and mechanisms of gas sensing by GaN nanowires functionalized with gold nanoparticles [J].

Dobrokhotov, Vladimir ;

McIlroy, D. N. ;

Norton, M. Grant ;

Abuzir, A. ;

Yeh, W. J. ;

Stevenson, Ian ;

Pouy, R. ;

Bochenek, J. ;

Cartwright, M. ;

Wang, Lidong ;

Dawson, J. ;

Beaux, Miles ;

Berven, Chris .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (10)

[8] ZnO and ZnS Nanostructures: Ultraviolet-Light Emitters, Lasers, and Sensors [J].

Fang, Xiaosheng ;

Bando, Yoshio ;

Gautam, Ujjal K. ;

Zhai, Tianyou ;

Zeng, Haibo ;

Xu, Xijin ;

Liao, Meiyong ;

Golberg, Dmitri .

CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES, 2009, 34 (3-4) :190-223

[9] Single-Crystalline ZnS Nanobelts as Ultraviolet-Light Sensors [J].

Fang, Xiaosheng ;

Bando, Yoshio ;

Liao, Meiyong ;

Gautam, Ujjal K. ;

Zhi, Chunyi ;

Dierre, Benjamin ;

Liu, Baodan ;

Zhai, Tianyou ;

Sekiguchi, Takashi ;

Koide, Yasuo ;

Golberg, Dmitri .

ADVANCED MATERIALS, 2009, 21 (20) :2034-2039

[10] Photoconductive gain modelling of GaN photoconductors [J].

Garrido, JA ;

Monroy, E ;

Izpura, I ;

Munoz, E .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1998, 13 (06) :563-568

← 1 2 3 4 →