Enhanced ultraviolet sensitivity of zinc oxide nanoparticle photoconductors by surface passivation

被引：65

作者：

Qin, Liqiao ^{[1
]}

Shing, Christopher ^{[1
]}

Sawyer, Shayla ^{[1
]}

Dutta, Partha S. ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, Elect Comp & Syst Engn Dept, Troy, NY 12180 USA

来源：

OPTICAL MATERIALS | 2011年 / 33卷 / 03期

基金：

美国国家科学基金会;

关键词：

Zinc oxide (ZnO) nanoparticles; Polyvinyl-alcohol (PVA); Ultraviolet (UV) photoconductor; Surface passivation; COLLOIDAL ZNO NANOPARTICLES; PHOTOLUMINESCENCE; NANOCRYSTALS; FLUORESCENCE; DEPOSITION;

D O I：

10.1016/j.optmat.2010.09.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zinc oxide nanoparticles were created by a top-down wet-chemical etching process and then coated with polyvinyl-alcohol (PVA), exhibiting sizes ranging from 10 to 120 nm with an average size approximately 80 nm. The PVA layer provides surface passivation of zinc oxide nanoparticles. As a result of PVA coating, enhancement in ultraviolet emission and suppression of parasitic green emission is observed. Photoconductors fabricated using the PVA coated zinc oxide nanoparticles exhibited a ratio of ultraviolet photo-generated current to dark current as high as 4.5 x 10(4), 5 times better than that of the devices fabricated using uncoated ZnO nanoparticles. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：359 / 362

页数：4

共 28 条

[1] Photoluminescence and photoconducting properties of ZnO nanoparticles [J].

Bhat, S. Venkataprasad ;

Vivekchand, S. R. C. ;

Govindaraj, A. ;

Rao, C. N. R. .

SOLID STATE COMMUNICATIONS, 2009, 149 (13-14) :510-514

[2] A high-performance ultraviolet photoconductive detector based on a ZnO film grown by RF sputtering [J].

Bi, Zhen ;

Zhang, Jingwen ;

Bian, Xuming ;

Wang, Dong ;

Zhang, Xin'an ;

Zhang, Weifeng ;

Hou, Xun .

JOURNAL OF ELECTRONIC MATERIALS, 2008, 37 (05) :760-763

[3] Luminescence behaviour of chemically grown ZnO quantum dots [J].

Borgohain, K ;

Mahamuni, S .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1998, 13 (10) :1154-1157

[4] The unsaturated photocurrent controlled by two-dimensional barrier geometry of a single ZnO nanowire Schottky photodiode [J].

Cheng, Gang ;

Li, Zhaohan ;

Wang, Shujie ;

Gong, Hechun ;

Cheng, Ke ;

Jiang, Xiaohong ;

Zhou, Shaomin ;

Du, Zuliang ;

Cui, Tian ;

Zou, Guangtian .

APPLIED PHYSICS LETTERS, 2008, 93 (12)

[5]

Durán P, 2002, ADV MATER, V14, P137, DOI 10.1002/1521-4095(20020116)14:2<137::AID-ADMA137>3.0.CO

[6]

2-7

[7] Photoluminescence investigation of the carrier recombination processes in ZnO quantum dots and nanocrystals [J].

Fonoberov, VA ;

Alim, KA ;

Balandin, AA ;

Xiu, FX ;

Liu, JL .

PHYSICAL REVIEW B, 2006, 73 (16)

[8] Highly monodisperse polymer-capped ZnO nanoparticles: Preparation and optical properties [J].

Guo, L ;

Yang, SH ;

Yang, CL ;

Yu, P ;

Wang, JN ;

Ge, WK ;

Wong, GKL .

APPLIED PHYSICS LETTERS, 2000, 76 (20) :2901-2903

[9] Site-specific growth of Zno nanorods using catalysis-driven molecular-beam epitaxy [J].

Heo, YW ;

Varadarajan, V ;

Kaufman, M ;

Kim, K ;

Norton, DP ;

Ren, F ;

Fleming, PH .

APPLIED PHYSICS LETTERS, 2002, 81 (16) :3046-3048

[10] Solution-processed ultraviolet photodetedtors based on colloidal ZnO nanoparticles [J].

Jin, Yizheng ;

Wang, Jianpu ;

Sun, Baoquan ;

Blakesley, James C. ;

Greenham, Neil C. .

NANO LETTERS, 2008, 8 (06) :1649-1653

← 1 2 3 →