Effect of Surface Capping with Poly(vinyl alcohol) on the Photocarrier Relaxation of ZnO Nanowires

被引：92

作者：

Bera, Ashok ^{[1
]}

Basak, Durga ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, India

来源：

ACS APPLIED MATERIALS & INTERFACES | 2009年 / 1卷 / 09期

关键词：

ZnO; PVA; surface capping; carrier relaxation; HYDROTHERMAL METHOD; GROWTH; ARRAYS; FILMS;

D O I：

10.1021/am900422y

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of surface capping with poly(vinyl,alcohol) (PVA) on the photocarrier relaxation of the aqueous chemically grown ZnO nanowires (NWs) has been investigated. The decay in the photocurrent during steady ultraviolet illumination due to the photocarrier relaxation has been reduced in the capped NWs, as evidenced From a decrease in the photocurrent only by 12% of Its maximum value under steady illumination For 15 min and a decrease in. the photocurrent by 49% of its maximum value during the same Interval of time in the as-grown NWs. The surface modification is confirmed from the FESEM, HRTEM, and FTIR results. The photoluminescence spectrum shows an enhanced ultraviolet emission and a reduced defect-related emission In the capped ZnO NWs compared to bare ZnO.

引用

页码：2066 / 2070

页数：5

共 23 条

[1] Role of defects in the anomalous photoconductivity in ZnO nanowires [J].

Bera, A. ;

Basak, D. .

APPLIED PHYSICS LETTERS, 2009, 94 (16)

[2] Carrier relaxation through two-electron process during photoconduction in highly UV sensitive quasi-one-dimensional ZnO nanowires [J].

Bera, A. ;

Basak, D. .

APPLIED PHYSICS LETTERS, 2008, 93 (05)

[3] Optical and dielectric properties of ZnO-PVA nanocomposites [J].

Bouropoulos, N. ;

Psarras, G. C. ;

Moustakas, N. ;

Chrissanthopoulos, A. ;

Baskoutas, S. .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2008, 205 (08) :2033-2037

[4] Contact-controlled sensing properties of flowerlike ZnO nanostructures [J].

Feng, P ;

Wan, Q ;

Wang, TH .

APPLIED PHYSICS LETTERS, 2005, 87 (21) :1-3

[5] White-Light-Emitting Diode Based on ZnO Nanotubes [J].

Guo, Honghui ;

Lin, Zhonghua ;

Feng, Zengfang ;

Lin, Lingling ;

Zhou, Jianzhang .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (28) :12546-12550

[6] 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

[7] Synthesis and characterization of a micro scale zinc oxide-PVA composite by ultrasound irradiation and the effect of composite on the crystal growth of zinc oxide [J].

Kumar, RV ;

Elgamiel, R ;

Koltypin, Y ;

Norwig, J ;

Gedanken, A .

JOURNAL OF CRYSTAL GROWTH, 2003, 250 (3-4) :409-417

[8] Recent innovations in barrier technologies for plastic packaging - a review [J].

Lange, J ;

Wyser, Y .

PACKAGING TECHNOLOGY AND SCIENCE, 2003, 16 (04) :149-158

[9] Giant enhancement in UV response of ZnO nanobelts by polymer surface-functionalization [J].

Lao, Chang Shi ;

Park, Myung-Chul ;

Kuang, Qin ;

Deng, Yulin ;

Sood, Ashok K. ;

Polla, Dennis L. ;

Wang, Zhong L. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (40) :12096-+

[10] ZnO nanobelt/nanowire Schottky diodes formed by dielectrophoresis alignment across Au electrodes [J].

Lao, CS ;

Liu, J ;

Gao, PX ;

Zhang, LY ;

Davidovic, D ;

Tummala, R ;

Wang, ZL .

NANO LETTERS, 2006, 6 (02) :263-266

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