中国物理B ›› 2024, Vol. 33 ›› Issue (4): 47701-047701.doi: 10.1088/1674-1056/ad2607

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BaTiO3/p-GaN/Au self-driven UV photodetector with bipolar photocurrent controlled by ferroelectric polarization

Wushuang Han(韩无双)1,2, Kewei Liu(刘可为)1,2,†, Jialin Yang(杨佳霖)1,2, Yongxue Zhu(朱勇学)1,2, Zhen Cheng(程祯)1,2, Xing Chen(陈星)1,2, Binghui Li(李炳辉)1,2, Lei Liu(刘雷)1,2, and Dezhen Shen(申德振)1,2   

  1. 1 State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2024-01-03 修回日期:2024-01-29 接受日期:2024-02-05 出版日期:2024-03-19 发布日期:2024-03-22
  • 通讯作者: Kewei Liu E-mail:liukw@ciomp.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 62074148, 61875194, 11727902, 12204474, 12304111, and 12304112), the Youth Innovation Promotion Association, Chinese Academy of Sciences (Grant No. 2020225), Jilin Province Science Fund (Grant Nos. 20220101053JC and 20210101145JC), and Jilin Province Young and Middle-Aged Science and Technology Innovation Leaders and Team Project (Grant No. 20220508153RC).

BaTiO3/p-GaN/Au self-driven UV photodetector with bipolar photocurrent controlled by ferroelectric polarization

Wushuang Han(韩无双)1,2, Kewei Liu(刘可为)1,2,†, Jialin Yang(杨佳霖)1,2, Yongxue Zhu(朱勇学)1,2, Zhen Cheng(程祯)1,2, Xing Chen(陈星)1,2, Binghui Li(李炳辉)1,2, Lei Liu(刘雷)1,2, and Dezhen Shen(申德振)1,2   

  1. 1 State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2024-01-03 Revised:2024-01-29 Accepted:2024-02-05 Online:2024-03-19 Published:2024-03-22
  • Contact: Kewei Liu E-mail:liukw@ciomp.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 62074148, 61875194, 11727902, 12204474, 12304111, and 12304112), the Youth Innovation Promotion Association, Chinese Academy of Sciences (Grant No. 2020225), Jilin Province Science Fund (Grant Nos. 20220101053JC and 20210101145JC), and Jilin Province Young and Middle-Aged Science and Technology Innovation Leaders and Team Project (Grant No. 20220508153RC).

摘要: Ferroelectric materials are promising candidates for ultraviolet photodetectors due to their ferroelectric effect. In this work, a BaTiO3/p-GaN/Au hybrid heterojunction—Schottky self-driven ultraviolet photodetector was fabricated with excellent bipolar photoresponse property. At 0 V bias, the direction of the photocurrent can be switched by flipping the depolarization field of BaTiO3, which allows the performance of photodetectors to be controlled by the ferroelectric effect. Meanwhile, a relatively large responsivity and a fast response speed can be also observed. In particular, when the depolarization field of BaTiO3 is in the same direction of the built-in electric field of the Au/p-GaN Schottky junction (up polarized state), the photodetector exhibits a high responsivity of 18 mA/W at 360 nm, and a fast response speed of < 40 ms at 0 V. These findings pave a new way for the preparation of high-performance photodetectors with bipolar photocurrents.

关键词: ferroelectric effect, bipolar, self-driven, photodetector

Abstract: Ferroelectric materials are promising candidates for ultraviolet photodetectors due to their ferroelectric effect. In this work, a BaTiO3/p-GaN/Au hybrid heterojunction—Schottky self-driven ultraviolet photodetector was fabricated with excellent bipolar photoresponse property. At 0 V bias, the direction of the photocurrent can be switched by flipping the depolarization field of BaTiO3, which allows the performance of photodetectors to be controlled by the ferroelectric effect. Meanwhile, a relatively large responsivity and a fast response speed can be also observed. In particular, when the depolarization field of BaTiO3 is in the same direction of the built-in electric field of the Au/p-GaN Schottky junction (up polarized state), the photodetector exhibits a high responsivity of 18 mA/W at 360 nm, and a fast response speed of < 40 ms at 0 V. These findings pave a new way for the preparation of high-performance photodetectors with bipolar photocurrents.

Key words: ferroelectric effect, bipolar, self-driven, photodetector

中图分类号:  (BaTiO3-based films)

  • 77.55.fe
77.80.-e (Ferroelectricity and antiferroelectricity) 85.60.-q (Optoelectronic devices) 61.80.Ba (Ultraviolet, visible, and infrared radiation effects (including laser radiation))