【摘 要】
：
采用溶胶-凝胶技术在Pt/Ti/SiO_2/Si衬底上制备了不同镧掺杂浓度BiGaO_3(Lx BGO,0≤x≤0.1)薄膜.X-射线衍射(XRD)表明该属于正交晶系的多晶薄膜,原子力显微镜(AFM)图像显示样
【机 构】
：
华东师范大学电子工程系极化材料与器件教育部重点实验室,中国科学院上海技术物理研究所红外物理国家重点实验室,温州医科大学信息与工程学院生物医学工程学系,
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采用溶胶-凝胶技术在Pt/Ti/SiO_2/Si衬底上制备了不同镧掺杂浓度BiGaO_3(Lx BGO,0≤x≤0.1)薄膜.X-射线衍射(XRD)表明该属于正交晶系的多晶薄膜,原子力显微镜(AFM)图像显示样品表面具有很好的平整性.采用椭圆偏振技术对其光学性质进行了详细的研究,发现其光学常数符合Adachi色散模型.进一步发现其禁带宽度随着镧掺杂浓度的增加而增加,该规律与理论预言相吻合.有关LxBGO材料的研究为铋基光电器件如紫外探测器的实现提供物理基础支持.
The films of BiGaO_3 (Lx BGO, 0≤x≤0.1) with different lanthanum doping concentrations were prepared on Pt / Ti / SiO_2 / Si substrate by sol-gel technique.X-ray diffraction (XRD) Department of polycrystalline thin films, atomic force microscopy (AFM) image shows the sample surface has a good flatness.Using the elliptical polarization technique for its optical properties were studied in detail and found that the optical constants in line with the Adachi dispersion model.It was further found that the band gap The width increases with the increase of lanthanum doping concentration, which is consistent with the theoretical predictions.The research on LxBGO materials provides the physical basis for the realization of bismuth-based optoelectronic devices such as UV detectors.
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