Acta Optica Sinica, Volume. 43, Issue 20, 2004003(2023)
Preparation and Study of Ag Nanoparticles Composite Amorphous Gallium Oxide Photodetector
Figures & Tables(6)
Fig. 1. Material characterization of Ga2O3 film. (a) SEM image of cross section of Ga2O3 film grown on sapphire substrate at room temperature; (b) XRD image of 20 s Ag-NPs/Ga2O3; (c) AFM image of Ga2O3; (d) AFM image of 20 s Ag-NPs/Ga2O3; (e) absorption spectra of Ga2O3 and Ag-NPs/Ga2O3; (f) curve of (αhν)2-hν
Fig. 2. I-V curves of Ga2O3 photodetectors. (a) I-V curves of amorphous Ga2O3 and Ag-NPs/Ga2O3 thin film photodetectors in dark; (b) I-V curves of amorphous Ga2O3 and Ag-NPs/Ga2O3 thin film photodetectors irradiated by 254 nm ultraviolet (UV) light; (c) I-V curves of 20 s Ag-NPs/Ga2O3thin film photodetector under dark, 254 nm, and 365 nm UV lights, respectively; (d) fitted relation curve of photocurrent with light intensity
Fig. 3. Performance test of Ga2O3 photodetectors. (a) I-t curve of 20 s Ag-NPs/Ga2O3 thin film photodetector under 254 nm UV irradiation at 5 V bias with different light intensities; (b) I-t curve of 20 s Ag-NPs/Ga2O3 thin film photodetector irradiated by 254 nm UV light with intensity of 211 μW/cm2under different bias voltages; (c) linear relationship curve of PDCR and responsivity with light intensity; (d) linear relationship curve of detectivity and EQE with light intensity
Fig. 4. Fitting curves of rising and falling edges of different thin film photodetectors. (a) Ga2O3; (b) 5 s Ag-NPs/Ga2O3; (c) 10 s Ag-NPs/Ga2O3; (d) 20 s Ag-NPs/Ga2O3
Table 1. Time constants of rising and falling edges of thin film photodetectors
View tableTable 1. Time constants of rising and falling edges of thin film photodetectors
Photodetector Ga2O3 0.31 0.38 0.34 0.42 5 s Ag-NPs/Ga2O3 0.33 0.40 0.33 0.41 10 s Ag-NPs/Ga2O3 0.29 0.37 0.32 0.39 20 s Ag-NPs/Ga2O3 0.32 0.39 0.33 0.41
Table 2. Performance comparison of 20 s Ag-NPs/Ga2O3 thin film photodetector with other recently reported Ga2O3-based photodetectors
View tableTable 2. Performance comparison of 20 s Ag-NPs/Ga2O3 thin film photodetector with other recently reported Ga2O3-based photodetectors
Photodetector UV light /nm Idark /A PDCR R（A·W-1） /Jones Reference Al/Ga2O3 254 1.52×10-10@20 V 2.55×104@20 V 0.8@20 V 1.1×1011@20 V ［ 13 ］Al/Ga2O3 254 ~1.00×10-8@15 V ~2.00×103@15 V 23.2@15 V ~2.0×1011@15 V ［ 31 ］Ga/Ga2O3 254 8.52×10-12@10 V ~8.00×105@10 V 2.9@15 V — ［ 32 ］Amorphous Ga2O3 254 ~2.00×10-7@10 V — 0.2@10 V — ［ 19 ］Amorphous Ga2O3 254 1.02×10-9@10 V — 3.2×10-3@5 V — ［ 33 ］Amorphous Ga2O3 254 9.43×10-12@10 V — 1.3@10 V — ［ 11 ］Amorphous Ga2O3 250 2.32×10-10@5 V 319.00@5 V 1.5@5 V 1.1×1014@5 V ［ 34 ］Ga2O3/CuI microwire 254 ~8.50×10-15@0 V — 8.5×10-3@0 V 7.8×1011@0 V ［ 35 ］PEDOTs/Ga2O3 254 ~1.00×10-13@-0.5 V — 2.6@0 V ~1.0×1013@-0.5 V ［ 36 ］β-Ga2O3 254 1.10×10-10@9 V 6.38×105@9 V 2.3@9 V ~5.5×1013@9 V ［ 37 ］20 s Ag-NPs/Ga2O3 254 9.40×10-14@5 V 5.90×105@5 V 36.1×10-3@5 V 2.0×1014@5 V This work 10 s Ag-NPs/Ga2O3 254 6.70×10-14@5 V 6.70×104@5 V 6.0×10-3@5 V 4.1×1012@5 V This work 5 s Ag-NPs/Ga2O3 254 1.10×10-13@5 V 1.40×105@5 V 5.0×10-3@5 V 2.7×1012@5 V This work
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Qiang Xu, Lili Yang, Zeng Liu, Maolin Zhang, Shan Li, Weihua Tang. Preparation and Study of Ag Nanoparticles Composite Amorphous Gallium Oxide Photodetector[J]. Acta Optica Sinica, 2023, 43(20): 2004003
Paper Information
Category: Detectors
Received: Apr. 13, 2023
Accepted: May. 31, 2023
Published Online: Oct. 23, 2023
The Author Email: Yang Lili (liliyang@njupt.edu.cn), Tang Weihua (whtang@njupt.edu.cn)
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