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
- Laser & Optoelectronics Progress
- Vol. 59, Issue 11, 1104001 (2022)
Fig. 1. XRD patterns of BT heterojunctions with different mass fractions
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
Fig. 3. TEM images of 20%-BT. (a)-(c) Bright field images; (d) HRTEM image
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
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 2. Absolute electronegativity and band structure parameters of Bi2O2Se and TiO2
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