Optical and Structural Properties of Plasma-Treated ZnO Nanostructures

被引：2
|
作者：
Lee, Geon Joon [1 ]
Lee, Jin Young [1 ]
Uhm, Han Sup [1 ]
Choi, Eun Ha [1 ]
Kim, Eun-Kyung [2 ]
Han, Sung-Hwan [2 ]
机构：
[1] Kwangwoon Univ, Dept Elect & Biol Phys, Plasma Biosci Res Ctr, Seoul 139701, South Korea
[2] Hanyang Univ, Dept Chem, Seoul 133791, South Korea
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2014年 / 14卷 / 07期
基金：
新加坡国家研究基金会;
关键词：
ZnO Nanostructures; Hydrogen Plasma Treatment; Near-Band-Edge Emission; Photoluminescence; Cathodoluminescence; Water Contact Angle; CHEMICAL BATH DEPOSITION; PHOTOLUMINESCENCE; NANORODS; GROWTH;
D O I：
10.1166/jnn.2014.9504
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We studied the effect of plasma treatment on the structural and optical properties of ZnO nano-structures prepared by chemical bath deposition in an aqueous solution of Zn(NO3)(2) and hexamethylenetetramine. The room-temperature photoluminescence (PL) spectrum of the as-grown ZnO nanostructures exhibited two emission bands due to exciton emission and defect emission. After treating with hydrogen plasma, the treated ZnO nanostructures exhibited stronger exciton emission than the as-grown, untreated ZnO nanostructures in their respective cathodoluminescence and PL spectra. The low-temperature PL spectrum of the hydrogen plasma-treated ZnO nanostructures showed a strong exciton emission at 3.34 eV, attributing to the bound exciton and its longitudinal optical-phonon sidebands. The strong exciton emission is thought to be due to the combined effect of exciton emission enhancement by defect passivation and optical confinement resulting from nanostructure geometry.
引用
收藏
页码：5171 / 5176
页数：6
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