Ambient Dependence of Photoluminescence for ZnO Nanocrystalline Films Synthesized in a Sonochemical Method

被引：5

作者：

Lee, Dong Jae ^{[1
]}

Park, Jong Hyurk ^{[2
]}

Yee, Kee Joo ^{[3
]}

Lee, Yun Sang ^{[1
]}

机构：

[1] Soongsil Univ, Dept Phys, Seoul 156743, South Korea

[2] Elect & Telecommun Res Inst, IT Convergence & Components & Mat Res Lab, Taejon 305700, South Korea

[3] Chungnam Natl Univ, Dept Phys, Taejon 305764, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2011年 / 50卷 / 07期

关键词：

ZINC-OXIDE; SURFACE; LUMINESCENCE; NANORODS; EMISSION; DEFECTS; GROWTH;

D O I：

10.1143/JJAP.50.072001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the photoluminescence (PL) spectra of solution-based synthesized ZnO nanocrystalline (NC) films under various ambient conditions. While the PL spectra typically showed a sharp peak near 375nm (near-band-edge, NBE) and a broad structure near 550nm (deep level, DL), the NBE peak was enhanced and the DL emission was significantly suppressed in an O-2-free atmosphere at room temperature. Interestingly, the PL spectra changed in an opposite manner in an O-2-rich atmosphere. These findings indicate that the light emission from ZnO NC films is easily controlled by the O-2 concentration in the atmosphere at room temperature, which is clearly distinguished from the post-annealing effect. (C) 2011 The Japan Society of Applied Physics

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页数：4

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