Effect of Annealing Temperature on Structure and Optical Properties of Sheet-like ZnO Crystals

PANG Hai-xia; LIU Chang-zhen; XIE An; MA Li; TANG Hua-wei; HU Ai-hong

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Effect of Annealing Temperature on Structure and Optical Properties of Sheet-like ZnO Crystals

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- Effect of Annealing Temperature on Structure and Optical Properties of Sheet-like ZnO Crystals
- Chinese Journal of Liquid Crystals and Displays Vol. 27, Issue 2, Pages: 158-162(2012)
- 作者机构：
  
  1. 湖北工业大学化学与环境工程学院,湖北武汉,430068
  2. 中国地质大学材料科学与化学工程学院, 教育部纳米矿物材料及应用工程研究中心,湖北武汉,430074
  3. 厦门理工学院材料科学与工程系,福建厦门,361024
- 作者简介：
- 基金信息：
- DOI：
  CLC： O571.22
- Received：15 August 2011，
  
  Revised：21 December 2011，
  
  Published Online：15 April 2012，
  
  Published：15 April 2012
- 稿件说明：
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庞海霞, 刘长珍, 谢安, 马丽, 汤化伟, 胡爱红. 热处理温度对片状ZnO晶体结构和光学性质的影响[J]. 液晶与显示, 2012,(2): 158-162

PANG Hai-xia, LIU Chang-zhen, XIE An, MA Li, TANG Hua-wei, HU Ai-hong. Effect of Annealing Temperature on Structure and Optical Properties of Sheet-like ZnO Crystals[J]. , 2012,(2): 158-162
庞海霞, 刘长珍, 谢安, 马丽, 汤化伟, 胡爱红. 热处理温度对片状ZnO晶体结构和光学性质的影响[J]. 液晶与显示, 2012,(2): 158-162 DOI：

PANG Hai-xia, LIU Chang-zhen, XIE An, MA Li, TANG Hua-wei, HU Ai-hong. Effect of Annealing Temperature on Structure and Optical Properties of Sheet-like ZnO Crystals[J]. , 2012,(2): 158-162 DOI：

摘要

采用均匀沉淀法

在无任何催化剂的条件下

两步合成片状ZnO晶体。105 ℃干燥得到ZnO晶体前驱物

400 ℃煅烧得到纯ZnO晶体。通过XRD、SEM、TEM、UV-vis 和PL光谱等测试手段对ZnO晶体在两个不同热处理温度下的结构和光学性质进行表征。结果显示:ZnO晶体为六方纤锌矿结构

(0001)面形貌为规则的片状正六边形。热处理温度由105 ℃升至400 ℃

样品直径增加

透射率降低

禁带宽度减小

光致发光近带边发射峰强度减弱

位置红移。实验结果表明

热处理温度对均匀沉淀法合成ZnO晶体的光学性质存在一定影响。

Abstract

Sheet-like ZnO crystal was prepared by homogeneous precipitation two steps method without any metal catalyst. Drying at 105 ℃

then annealing at 400 ℃

we can get the two samples with the two different heat treatment temperature. In order to investigate the influence of heat treatment temperature on sheet-like ZnO crystals

we used X-ray diffractometer

scanning electron microscopy

transmission electron microscope

ultraviolet-visible-near infrared spectrophotometer and fluorescence spectroscope to characterize the structure and optical properties of the two samples. The results reveal that the product is highly crystalline with hexagonal wurtzite phase and has the appearance of regular hexagon shape at (0001) plane. The crystallinity of sheet-like ZnO crystals was enhanced and the energy band gap was decreased with the annealing temperature increasing from 105 ℃ to 400 ℃. What's more

the near band gap peaks were red shift in the photoluminescence spectrum with the increasing of the annealing temperature.

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references

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