TThe optical properties of La doped BiGaO3 polycrystalline films
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National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences,National Laboratory for Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Key Laboratory of Polar Materials and Devices,Ministry of Education,Department of Electronic Engineering,East China Normal University,Department of Biomedical Engineering,School of Information and Engineering,Wenzhou Medical University,Key Laboratory of Polar Materials and Devices,Ministry of Education,Department of Electronic Engineering,East China Normal University,Key Laboratory of Polar Materials and Devices,Ministry of Education,Department of Electronic Engineering,East China Normal University,National Laboratory for Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,National Laboratory for Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences

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    Abstract:

    La doped BiGaO3 (LxBGO) films were fabricated by the Sol-Gel method on the Pt/Ti/SiO2/Si substrates. X-ray diffraction analysis shows that the films are polycrystalline with an orthorhombic structure. The atomic force microscopy images of the LxBGO films suggest that the surface morphology is smooth. The optical properties of the samples were investigated by the spectroscopic ellipsometry in detail. The dielectric functions were extracted and in good agreement with the Adachi dispersion function. More one step, the optical band gap tends to increase with increasing La composition, which is consistent with the results of theoretical prediction. These results are helpful for the fabrication of Bi-based opto-electrical devices such as ultraviolet detectors.

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ZHANG Jin-Zhong, ZHU Jia-Jun, DENG Qing-Lin, YU Wen-Lei, LI Ya-Wei, HU Zhi-Gao, MENG Xiang-Jian, CHU Jun-Hao. TThe optical properties of La doped BiGaO3 polycrystalline films[J]. Journal of Infrared and Millimeter Waves,2015,34(4):447~451

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History
  • Received:July 04,2014
  • Revised:May 25,2015
  • Adopted:December 03,2014
  • Online: September 29,2015
  • Published: