中国物理B ›› 2021, Vol. 30 ›› Issue (10): 106803-106803.doi: 10.1088/1674-1056/ac1571

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Scalable fabrication of Bi2O2Se polycrystalline thin film for near-infrared optoelectronic devices applications

Bin Liu(刘斌) and Hong Zhou(周洪)   

  1. School of Physics and Electronics, Hunan University, Changsha 410082, China
  • 收稿日期:2021-04-25 修回日期:2021-06-27 接受日期:2021-07-18 出版日期:2021-09-17 发布日期:2021-09-26
  • 通讯作者: Hong Zhou E-mail:zhouhong@hnu.edu.cn
  • 基金资助:
    Project supported by the Hunan Provincial Natural Science Foundation of China (Grant No. 2019JJ40032).

Scalable fabrication of Bi2O2Se polycrystalline thin film for near-infrared optoelectronic devices applications

Bin Liu(刘斌) and Hong Zhou(周洪)   

  1. School of Physics and Electronics, Hunan University, Changsha 410082, China
  • Received:2021-04-25 Revised:2021-06-27 Accepted:2021-07-18 Online:2021-09-17 Published:2021-09-26
  • Contact: Hong Zhou E-mail:zhouhong@hnu.edu.cn
  • Supported by:
    Project supported by the Hunan Provincial Natural Science Foundation of China (Grant No. 2019JJ40032).

摘要: We present a controlled, stepwise formation of layered semiconductor Bi2O2Se thin films prepared via the vapour process by annealing topological insulator Bi2Se3 thin films in low oxygen atmosphere for different reactions. Photodetectors based on Bi2O2Se thin film show a responsivity of 1.7×104 A/W at a wavelength of 980 nm. Field-effect transistors based on Bi2O2Se thin film exhibit n-type behavior and present a high electron mobility of 17 cm2/V·s. In addition, the electrical properties of the devices after 4 months keeping in the air shows little change, implying outstanding air-stability of our Bi2O2Se thin films. From the obtained results, it is evident that low oxygen annealing is a surprisingly effective method to fabricate Bi2O2Se thin films for integrated optoelectronic applications.

关键词: thin films, Bi2Se3, vapor-phase deposition, photodetector, Bi2O2Se

Abstract: We present a controlled, stepwise formation of layered semiconductor Bi2O2Se thin films prepared via the vapour process by annealing topological insulator Bi2Se3 thin films in low oxygen atmosphere for different reactions. Photodetectors based on Bi2O2Se thin film show a responsivity of 1.7×104 A/W at a wavelength of 980 nm. Field-effect transistors based on Bi2O2Se thin film exhibit n-type behavior and present a high electron mobility of 17 cm2/V·s. In addition, the electrical properties of the devices after 4 months keeping in the air shows little change, implying outstanding air-stability of our Bi2O2Se thin films. From the obtained results, it is evident that low oxygen annealing is a surprisingly effective method to fabricate Bi2O2Se thin films for integrated optoelectronic applications.

Key words: thin films, Bi2Se3, vapor-phase deposition, photodetector, Bi2O2Se

中图分类号:  (Thin film structure and morphology)

  • 68.55.-a
81.10.Bk (Growth from vapor) 85.60.Gz (Photodetectors (including infrared and CCD detectors))