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铜铁矿基p-TCO材料的制备与物性研究
引用本文:邓赞红,李达,朱雪斌,陶汝华,董伟伟,方晓东.铜铁矿基p-TCO材料的制备与物性研究[J].发光学报,2007,28(2):273-276.
作者姓名:邓赞红  李达  朱雪斌  陶汝华  董伟伟  方晓东
作者单位:1. 中国科学院,安徽光学精密机械研究所,安徽,合肥,230031
2. 中国科学院,固体物理研究所,安徽,合肥,230031
基金项目:国家自然科学基金 , 安徽省自然科学基金 , 中国科学院"百人计划"
摘    要:采用溶胶-凝胶法和高温固相反应法进行了铜铁矿结构单相CuBO2(B=Al,Cr,La)多晶陶瓷的制备,并采用脉冲激光沉积法(Pulsed laser deposition,PLD)制备了CuCrO2薄膜。结果表明:溶胶-凝胶法可以成功制备高纯CuAlO2和CuCrO2多晶材料。该方法还可以显著降低烧结温度且使烧结时间显著缩短;所制备的名义组分CuAlO2和CuCrO2样品均呈p型半导体导电行为,CuBO2的电导率随着B位离子半径的增大而明显减小;PLD法制备的CuCrO2薄膜呈高度c轴取向,厚度~200nm的薄膜在可见光区的平均透射率~80%。

关 键 词:溶胶-凝胶  铜铁矿  透明导电氧化物  脉冲激光沉积  薄膜
文章编号:1000-7032(2007)02-0273-04
修稿时间:2006-08-05

Synthesis and Properties of Delafossite Structured p-type Transparent Conductive Oxides
DENG Zan-hong,LI Da,ZHU Xue-bin,TAO Ru-hua,DONG Wei-wei,FANG Xiao-dong.Synthesis and Properties of Delafossite Structured p-type Transparent Conductive Oxides[J].Chinese Journal of Luminescence,2007,28(2):273-276.
Authors:DENG Zan-hong  LI Da  ZHU Xue-bin  TAO Ru-hua  DONG Wei-wei  FANG Xiao-dong
Institution:1. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China ; 2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
Abstract:It is common that the p-type wide-gap semiconductors are difficult to obtain, however, it is fortunate to observe that the delafossite structured ABO2 (A=Cu or Ag; B=Al, Cr, or La) compounds are p-type wide-gap semiconductors with high optical transparency, and the gap is higher than 3.1 eV for these mate-rials. The ABO2 compounds also show rather large power factor compared to other oxide materials. Therefore, it is expected to apply these materials in transparent semiconducting devices as well as in thermoelectric applications.The delafossite structured single phase CuBO2(B=Al,Cr,La)ceramics were synthesized by sol-gel and high temperature solid state reaction, respectively. Moreover, CuCrO2 films were prepared by pulsed laser deposition (PLD) using the synthesized single phase CuCrO2 ceramics as targets. The crystallization and microstructure of the samples were investigated by X-ray diffractometer (XRD) and field-emission scanning electron microscope (FE-SEM). The electron dispersion spectrum (EDS) was also used to determine the chemical composition. The temperature dependence of conductivity was measured by the standard two-probe method. Optical transmission spectra of the films were measured by a dual beam spectrophotometer. The study results showed that sol-gel was an effective approach to synthesize single phase CuAlO2 and CuCrO2 ceramics, with shorter sintering period and lower annealing temperature. The temperature dependence of conductivity for CuAlO2 and CuCrO2 ceramics showed that these two materials behaved as semiconductors around room temperature. Additionally, the room temperature conductivity of CuBO2(B=Al,Cr,La) decreased obviously with the increase of the radius of ions on B site. CuCrO2 thin films with high c-axis orientation were successfully prepared by PLD, and the optical transmittance of the CuCrO2 film with the thickness ~200 nm was about 80% in the visible region.
Keywords:sol-gel  delafossite  transparent conductive oxide  pulse laser deposition  thin film
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