自组装金纳米点在改善氧化锌薄膜电学和光学特性方面的作用。

Role of self-assembled gold nanodots in improving the electrical and optical characteristics of zinc oxide films.

作者信息

Tiwari Ashutosh, Chugh A, Jin C, Narayan J

机构信息

NSF Center of Advanced Materials & Smart Structures, Department of Materials Science & Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916, USA.

出版信息

J Nanosci Nanotechnol. 2003 Oct;3(5):368-71. doi: 10.1166/jnn.2003.217.

DOI:10.1166/jnn.2003.217

PMID:14733144

Abstract

We have studied the effect of embedding nanocrystalline Au particles on the electrical and optical characteristics of ZnO films. Au-embedded epitaxial ZnO films were deposited on (0001) sapphire substrates with a pulsed laser deposition technique. The crystalline quality of both the ZnO matrix and Au nanoparticles was investigated by X-ray diffraction and transmission electron microscopy. Composite films were characterized by photoluminescence, optical absorption, and low-temperature electrical resistivity measurements. Photoluminescence spectra of theses films showed a sharp excitonic peak at 3.22 +/- 0.05 eV without any signature of green band emission. Electrical resistivity measurements showed these films to be highly conducting, with a room-temperature resistivity of 3.4 +/- 0.2 m omega-cm.

摘要

我们研究了嵌入纳米晶金颗粒对氧化锌薄膜电学和光学特性的影响。采用脉冲激光沉积技术在（0001）蓝宝石衬底上沉积了嵌入金的外延氧化锌薄膜。通过X射线衍射和透射电子显微镜研究了氧化锌基体和金纳米颗粒的晶体质量。通过光致发光、光吸收和低温电阻率测量对复合薄膜进行了表征。这些薄膜的光致发光光谱在3.22±0.05 eV处显示出一个尖锐的激子峰，没有任何绿带发射的迹象。电阻率测量表明这些薄膜具有高导电性，室温电阻率为3.4±0.2 mΩ·cm。