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Laser & Optoelectronics Progress, Volume. 59, Issue 11, 1104001(2022)

Preparation and Photodetection Performance of Self-Powered Bi2O2Se/TiO2 Heterojunction Ultraviolet Detectors

Xiangyu Zhang, Yutian Chen, Zhi Zeng, Bingke Zhang, Chenchen Zhao, Shuai Ren, Ping Rong, Shiyong Gao, Dongbo Wang, Shujie Jiao, and Jinzhong Wang*
Author Affiliations
  • School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (7)
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    References (1)
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    Figures & Tables(7)
    XRD patterns of BT heterojunctions with different mass fractions

    Fig. 1. XRD patterns of BT heterojunctions with different mass fractions

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    Topography of different structures. (a) SEM image of TiO2; (b) SEM image of 20%-BT; (c) SEM image of 40%-BT; (d) SEM image of 60%-BT; (e) EDS image of 60%-BT

    Fig. 2. Topography of different structures. (a) SEM image of TiO2; (b) SEM image of 20%-BT; (c) SEM image of 40%-BT; (d) SEM image of 60%-BT; (e) EDS image of 60%-BT

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    TEM images of 20%-BT. (a)-(c) Bright field images; (d) HRTEM image

    Fig. 3. TEM images of 20%-BT. (a)-(c) Bright field images; (d) HRTEM image

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    Photodetection performance of different detectors. (a) I-T characteristic curve; (b) response time of TiO2 detector; (c) response time of 60%-BT detector; (d) responsivity and detection rate

    Fig. 4. Photodetection performance of different detectors. (a) I-T characteristic curve; (b) response time of TiO2 detector; (c) response time of 60%-BT detector; (d) responsivity and detection rate

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    Schematic diagram of energy level structure of BT heterojunction

    Fig. 5. Schematic diagram of energy level structure of BT heterojunction

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    • Table 1. First ionization energy, electron affinity energy and Mulliken electronegativity of each atom

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      Table 1. First ionization energy, electron affinity energy and Mulliken electronegativity of each atom

      AtomicFirst ionization energyElectron affinity energyMulliken electronegativity
      Bi7.2860.9424.114
      Se9.7522.2015.887
      O13.6181.4617.540
      Ti6.8280.0883.458

    • Table 2. Absolute electronegativity and band structure parameters of Bi2O2Se and TiO2

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      Table 2. Absolute electronegativity and band structure parameters of Bi2O2Se and TiO2

      MaterialAbsolute electronegativityEgEVBECB
      Bi2O2Se5.6320.8501.5570.707
      TiO25.8153.2002.915-0.285
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    Xiangyu Zhang, Yutian Chen, Zhi Zeng, Bingke Zhang, Chenchen Zhao, Shuai Ren, Ping Rong, Shiyong Gao, Dongbo Wang, Shujie Jiao, Jinzhong Wang. Preparation and Photodetection Performance of Self-Powered Bi2O2Se/TiO2 Heterojunction Ultraviolet Detectors[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1104001

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    Paper Information

    Category: Detectors

    Received: Aug. 18, 2021

    Accepted: Sep. 17, 2021

    Published Online: Jun. 9, 2022

    The Author Email:

    DOI:10.3788/LOP202259.1104001

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology