A solar-blind ultraviolet light detector based on graphene oxide-loaded zinc sulfide cluster aggregates and its preparation method and application
A technology of ultraviolet detectors and aggregates, applied in the field of solar-blind ultraviolet detection, can solve the problems of deteriorating optical absorption performance, poor electron transport performance of ZnS cluster aggregates, and difficulty.
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Embodiment 1
[0052] Example 1 Preparation of ZnS cluster aggregates capable of highly selectively absorbing the UVC band
[0053] (1) Preparation of Zn precursor: Weigh 0.05-0.8 mmol of inorganic zinc salt, dissolve it in 5-15 mL of long-chain organic amine ligand and short-chain organic amine ligand solution, stir and heat to A clear solution was obtained at 80-120°C. Obtain Zn precursor solution after cooling;
[0054] Among them, the preferred amount of the inorganic zinc salt is any value between 0.05-0.8 mmol, preferably 0.05 mmol, 0.1 mmol, 0.3 mmol, 0.6 mmol, 0.8 mmol.
[0055] Wherein, the dosage of long-chain organic amine ligand and short-chain organic amine ligand solution is any value between 5-15mL, preferably 5mL, 6mL, 7mL, 8mL, 10mL, 11mL, 12mL, 15mL.
[0056] Wherein, the heating temperature is any value between 80°C and 120°C, preferably 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, 115°C, 120°C.
[0057] Wherein, the inorganic zinc salt is zinc chloride, zinc ethyl xant...
Embodiment 2
[0070] Example 2 Preparation of self-powered solar-blind ultraviolet light detectors of zinc sulfide cluster aggregates loaded with graphene oxide and protected
[0071] (1) Configuration of the mixed solution of ZnS cluster aggregates and graphene oxide: Weigh 0.02-0.9mmol graphene oxide, dissolve it in a specific organic solvent of 0.02-0.8mmol / L ZnS cluster aggregates, stir 1h, ultrasonication for 1-4h to obtain a uniformly mixed solution, wherein the molar ratio of the ZnS clusters to graphene oxide is 1:0.2-1, preferably 1:0.2, 1:0.4, 1:0.6, 1:0.8 or 1:1;
[0072] (2) The mixed solution of the ZnS cluster aggregate and graphene oxide obtained in step (1) is dropped on the graphene quartz transparent conductive substrate, and a thin film can be formed on the substrate by spin coating or scraping coating;
[0073] (3) Annealing process: place the substrate obtained in step (2) in a vacuum drying oven, set a constant temperature of 80-140° C. under vacuum, and anneal for 8-...
Embodiment 3
[0085] Example 3 The self-powered solar-blind ultraviolet photodetector based on graphene oxide-loaded and protected zinc sulfide cluster aggregates prepared by the present invention is compared with the solar-blind ultraviolet detector with similar device structure.
[0086] Table 1 The performance comparison of the detector prepared by the present invention and the solar-blind ultraviolet detector with similar device structure
[0087]
[0088] The self-powered solar-blind ultraviolet photodetector prepared by the invention based on graphene oxide load-protected zinc sulfide cluster flake aggregates shows excellent photoresponse performance in the solar-blind ultraviolet region (the on-off ratio can be as high as 5565, the response The performance can be as high as 21.9mA / W, and the detection rate can be as high as 1.09×10 12 Jones, the rise time can be as short as 0.15s, the decay time can be as short as 0.14s) and extremely high photoselective response performance (reje...
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