Acta Photonica Sinica, Volume. 51, Issue 2, 0251214(2022)
Fabrication and Photoresponse Study of the Photodetector Based on Novel NiO-Bi2Te3 Heterostructure
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Fig. 1. Schematic diagram of the photodetector based on NiO/Bi2Te3 heterostructure（the inset shows the real device）
Fig. 2. XRD patterns，TEM image and Raman spectrum of NiO，Au NPs and Bi2Te3
Fig. 3. FESEM image of the morphology and EDS results of the elements analysis
Fig. 4. UV-Vis absorption and PL spectra of the NiO and NiO+Au NPs
Fig. 7. Dependence of the photocurrent and responsivity on incident light power density
Fig. 9. The time dependent current response and the devices' response time
Table 1. XRD peak's FWHM and grain size of the NiO samples with different Ni2+ concentration
View tableView in ArticleTable 1. XRD peak's FWHM and grain size of the NiO samples with different Ni2+ concentration
Sample K /nm /rad 2θ/（°） D/nm NiO（0.3 mol/L） 0.89 0.154 0.007 97 43.603 18 NiO（0.5 mol/L） 0.89 0.154 0.006 88 43.542 20 NiO（0.7 mol/L） 0.89 0.154 0.005 49 43.622 25
Table 2. Comparison of some key parameters of different devices
View tableView in ArticleTable 2. Comparison of some key parameters of different devices
Device structure Iph/μA Responsivity/（mA·W-1） Detectivity/（Jones） Gain NiO（0.3 mol/L）/Bi2Te3 135 282 9.2×109 90% NiO（0.5 mol/L）/Bi2Te3 489 1 019 3.5×1010 330% NiO（0.7 mol/L）/Bi2Te3 220 458 2.0×1010 149% NiO（0.5 mol/L）+Au NPs/Bi2Te3 593 1 236 5.9×1010 400%
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Minggang SHI, Haichuan MU, Min QIAN. Fabrication and Photoresponse Study of the Photodetector Based on Novel NiO-Bi2Te3 Heterostructure[J]. Acta Photonica Sinica, 2022, 51(2): 0251214
Paper Information
Category: Special Issue for Ultrafast Optics
Received: Oct. 13, 2021
Accepted: Nov. 25, 2021
Published Online: May. 19, 2022
The Author Email: MU Haichuan (hcmu@ecust.edu.cn)
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