欢迎访问《人工晶体学报》官方网站,今天是 2025年8月27日 星期三 分享到:

人工晶体学报 ›› 2025, Vol. 54 ›› Issue (5): 819-824.DOI: 10.16553/j.cnki.issn1000-985x.2024.0252

• 研究论文 • 上一篇    下一篇

LiNbO3/ITO异质结薄膜的制备及光电性质研究

朱家怡(), 杜帅, 周鹏飞, 郑凡, 陈云琳()   

  1. 北京交通大学物理科学与工程学院,北京 100044
  • 收稿日期:2024-10-25 出版日期:2025-05-15 发布日期:2025-05-28
  • 通信作者: 陈云琳,博士,教授。E-mail:ylchen@bjtu.edu.cn
  • 作者简介:朱家怡(2003—),女,浙江省人。E-mail:22341152@bjtu.edu.cn
  • 基金资助:
    国家大学生创新训练计划项目(20241000411453)

Preparation of LiNbO3/ITO Heterojunction Thin Films and Its Optoelectronic Properties

ZHU Jiayi(), DU Shuai, ZHOU Pengfei, ZHENG Fan, CHEN Yunlin()   

  1. School of Physics and Engineering,Beijing Jiaotong University,Beijing 100044,China
  • Received:2024-10-25 Online:2025-05-15 Published:2025-05-28

摘要: 在200 ℃下采用磁控溅射方法在玻璃衬底与硅基板上溅射沉积LiNbO3/ITO(LN/ITO)异质结薄膜。通过X射线衍射(XRD)、原子力显微镜(AFM)、紫外可见分光光度计和变温霍尔效应等测试了该薄膜的结构、形貌及光电性质。XRD测试结果表明,相比于ITO/LN,LN/ITO叠层顺序有更优的生长取向和结晶性能。AFM结果显示,200 ℃下异质结薄膜表面较为平整,鲜少有凸起。通过紫外可见分光光度计透光性能测试,相比于LN单层薄膜,叠层后的异质结薄膜的透光率在可见光范围内有所提高,且退火后异质结薄膜透光性进一步增强。利用变温霍尔效应测试仪研究了LN/ITO异质结的电学性质,测试结果表明LN/ITO异质结薄膜为p型半导体;与LN单层薄膜相比,LN/ITO异质结薄膜的电导率提高了11个数量级。

关键词: LN/ITO薄膜; 异质结; 磁控溅射镀膜; 透光率; 霍尔效应

Abstract: LiNbO3/ITO(LN/ITO) heterojunction thin films were sputter-deposited on glass and silicon substrates using magnetron sputtering technique at 200 ℃. The structure, morphology, and optoelectronic properties of the films were characterized through X-ray diffraction (XRD), atomic force microscope (AFM), ultraviolet-visible spectrophotometer, and variable temperature Hall effect measurements. XRD analysis reveals that the stacked sequence of LN/ITO heterojunction exhibited superior growth orientation and crystalline properties. AFM images show that the surface of the heterojunction thin film at 200 ℃ is relatively smooth with minimal protrusions. The ultraviolet-visible spectrophotometer indicates that the transmittance of the stacked heterojunction thin film in the visible light range was enhanced compared to that of the LN single-layer film, and the transmittance of the heterojunction film was further improved after annealing. The electrical properties of the LN/ITO heterojunction were investigated using a Hall effect tester. The results demonstrate that the LN/ITO heterojunction thin film is an p-type semiconductor. Compared to the LN single-layer film, the conductivity of the LN/ITO heterojunction thin film was increased by 11 orders of magnitude.

Key words: LN/ITO thin film; heterojunction; magnetron sputtering coating; light transmittance; Hall effect

中图分类号: