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首页> 外文期刊>Journal of materials science >Influence of annealing temperature and oxygen atmosphere on the optical and photoluminescence properties of BaTiO_3 amorphous thin films prepared by sol-gel method
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Influence of annealing temperature and oxygen atmosphere on the optical and photoluminescence properties of BaTiO_3 amorphous thin films prepared by sol-gel method

机译：退火温度和氧气气氛对溶胶-凝胶法制备BaTiO_3非晶薄膜的光学和光致发光性能的影响

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摘要

Homogeneous and transparent BaTiO_3 thin films were prepared by sol-gel dip coating method. The prepared BaTiO_3 thin films were annealed in air and O_2 atmosphere at different temperatures. The annealed BaTiO_3 thin films were amorphous in nature. Scanning electron microscopy (SEM) revealed the nucleation and particle growth on the films. Energy-dispersive X-ray (EDX) analysis data revealed the adsorption of oxygen atoms in the BaTiO_3 film. The direct energy band gap was found to vary (3.84-3.58 eV) as functions of annealing atmosphere and temperature. Photoluminescence (PL) revealed intense emission peaks at 393 and 675 nm. Quenching of PL intensity was observed in films annealed at high temperature and in O_2 atmosphere. This is due to reduction in the oxygen vacancy by the adsorption of oxygen in the film. Luminescence spectra also have been related to the results obtained by SEM and EDX analysis. The change in luminescence intensity of BaTiO_3 thin films makes it suitable for optoelectronic temperature sensor applications.
机译：采用溶胶-凝胶浸涂法制备了均匀透明的BaTiO_3薄膜。将制备的BaTiO_3薄膜在空气和O_2气氛中于不同温度下退火。退火后的BaTiO_3薄膜本质上是非晶态的。扫描电子显微镜（SEM）揭示了薄膜上的形核和颗粒生长。能量色散X射线（EDX）分析数据显示BaTiO_3膜中氧原子的吸附。发现直接能带隙随退火气氛和温度而变化（3.84-3.58eV）。光致发光（PL）显示了在393和675 nm处的强烈发射峰。在高温和O_2气氛中退火的薄膜中观察到PL强度的淬灭。这是由于通过膜中氧的吸附减少了氧空位。发光光谱还与通过SEM和EDX分析获得的结果有关。 BaTiO_3薄膜的发光强度变化使其适合于光电温度传感器应用。

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  • 来源
    《Journal of materials science》 |2013年第3期|848-854|共7页
  • 作者

    L. V. Maneeshya; V. S. Anitha; Sujatha S. Lekshmy; I. John Berlin; Prabitha B. Nair; Georgi P. Daniel; P. V. Thomas; K. Joy;

  • 作者单位

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

    Thin Film Lab, Post Graduate and Research Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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