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Influence of Ni doping on phase transformation and optical properties of TiO_2 films deposited on quartz substrates by sol-gel process

机译:Ni掺杂对溶胶-凝胶法沉积在石英衬底上的TiO_2薄膜相变和光学性能的影响

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摘要

The Ni-doped TiO_2 films were synthesized on quartz substrates by the sol-gel method. Results from X-ray diffraction and Raman spectra indicate that Ni doping catalyzes the anatase-to-rutile transformation. When Ni content is up to 10mol%, the transformation has been finished. The dielectric functions of Ni-doped TiO_2 films were extracted by fitting transmittance spectra according to the Adachi's dielectric function model. The optical band gap decreases from 3.64 eV to 3.51 eV with increasing Ni content. The results suggest that the acceleration of phase change and variation of optical properties may be related to defects due to Ni doping.
机译:采用溶胶-凝胶法在石英衬底上合成了Ni掺杂的TiO_2薄膜。 X射线衍射和拉曼光谱的结果表明,Ni掺杂催化锐钛矿-金红石相变。当Ni含量高达10mol%时,相变已经完成。根据Adachi的介电函数模型,通过拟合透射光谱提取了掺Ni的TiO_2薄膜的介电函数。随着Ni含量的增加,光学带隙从3.64 eV降低到3.51 eV。结果表明,相变的加速和光学性质的变化可能与由于Ni掺杂引起的缺陷有关。

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  • 来源
    《Applied Surface Science》 |2012年第11期|p.4893-4897|共5页
  • 作者单位

    Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 500 Dongchuan Rd, Shanghai 200241, China;

    Laboratory for Microsrructures, Shanghai University, 99 Shangda Rd, Shanghai 200444, China;

    Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 500 Dongchuan Rd, Shanghai 200241, China;

    Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 500 Dongchuan Rd, Shanghai 200241, China;

    Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 500 Dongchuan Rd, Shanghai 200241, China;

    Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 500 Dongchuan Rd, Shanghai 200241, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    TiO_2; doping; growth kinetics; phase transition; optical property;

    机译:TiO_2;掺杂生长动力学;相变光学性质;

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