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Visual self-driven ultraviolet photoelectric detector and preparation method thereof

A technology of electrical detectors and ultraviolet light, which is applied in the direction of sustainable manufacturing/processing, circuits, electrical components, etc., can solve the problems of being easily corroded by ultraviolet rays, difficult to apply, and high breakdown electric field, and achieves low preparation costs and short response time , Environmentally friendly effect

Inactive Publication Date: 2017-03-15
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commercially used photoconductive ultraviolet detectors (silicon-based and photomultiplier tubes) have high sensitivity and mature technology, but the material itself is not resistant to high temperature and high pressure, and is easily corroded by ultraviolet light, so it is not conducive to long-term use
Semiconductor materials such as SiC, GaN and ZnO have the characteristics of wide band gap, high breakdown electric field and high voltage resistance, but the preparation process of these materials is generally complicated and the cost is too high, so it is difficult to obtain wide application.

Method used

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  • Visual self-driven ultraviolet photoelectric detector and preparation method thereof
  • Visual self-driven ultraviolet photoelectric detector and preparation method thereof
  • Visual self-driven ultraviolet photoelectric detector and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) The titanium sheet was polished smooth with sandpaper, and after ultrasonic cleaning with acetone, deionized water and alcohol in sequence, the 4 F and 2vol% deionized water in ethylene glycol solution were used for anodic oxidation of two electrodes, wherein platinum wire was used as the counter electrode. The oxidation voltage is 20V, and the oxidation time is 30min, so as to obtain TiO 2 nanotube array stock, and then the resulting TiO 2 The nanotube array blank is annealed at 450°C for 30-60min to finally obtain TiO 2 array of nanotubes. TiO 2 Scanning electron microscope (SEM) image of the nanotube array figure 2 shown.

[0045] (2) Clean the FTO conductive glass sequentially with acetone, deionized water and alcohol, and place it in a drying box for drying. Place the dried FTO conductive glass on Fe 2 (SO 4 ) 3 and K 3 [Fe(CN) 6 ] in a mixed solution of constant current electrochemical deposition, the constant current is -40μA·cm -2 , the depositio...

Embodiment 2

[0048] (1) The FTO conductive glass is ultrasonically cleaned with acetone, deionized water and alcohol in sequence, and then dried. Place the cleaned and dried FTO conductive glass in a 200mL hydrothermal kettle, then add hydrochloric acid (concentration: 36wt%), deionized water (30mL) and TiCl with a volume ratio of 25:25:0.6 4 The mixed solution is then hydrothermally heated at 140°C for 12h to obtain TiO 2 Nanowire Array Stock. Finally, the resulting TiO 2 The nanowire array blank was annealed at 450°C for 30-60min to obtain TiO 2 array of nanowires.

[0049] (2) Clean the FTO conductive glass sequentially with acetone, deionized water and alcohol, and then dry it; place the dried FTO conductive glass on Fe 2 (SO 4 ) 3 and K 3 [Fe(CN) 6 ] in the mixed solution of galvanostatic electrochemical deposition, and the galvanostatic control was -40μA·cm -2 , the deposition time is 5min, and the Prussian blue film is finally obtained. The Fe 2 (SO 4 ) 3 and K 3 [Fe(C...

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Abstract

The invention discloses a visual self-driven ultraviolet photoelectric detector and a preparation method thereof. The visual self-driven ultraviolet photoelectric detector is composed of a titanium dioxide nanotube array with the titanium sheet acting as the substrate, potassium chloride electrolyte and Prussian blue with FTO conductive glass acting as the substrate. In the system, the titanium dioxide nanotube array acts as a photo-anode and the Prussian blue film acts as a counter electrode. The Prussian blue has excellent optical modulation characteristic so that the Prussian blue electrode can be used as an electrochromic display screen to realize visualization for ultraviolet light detection. Compared with the conventional ultraviolet light detector, the visual self-driven ultraviolet photoelectric detector has the advantages that (1) naked-eye visualization can be realized; (2) the detector is self-driven without external bias voltage; (3) the response time is short; (4) the sensitivity is high; and (5) the preparation cost is low, the technology is simple and the environment is friendly.

Description

technical field [0001] The invention belongs to the technical field of photoelectrochemical cells, and in particular relates to a visualized self-driven ultraviolet photodetector and a preparation method thereof. Background technique [0002] Ultraviolet photodetector is a sensor that converts a radiation form of electromagnetic waves (ultraviolet rays) into another signal that is easy to receive and process (commonly electrical signals), and is widely used in military and civilian applications. For example, in the military, it can be used in the anti-ultraviolet and anti-anti-resistance technology, and it also has great application value in civilian fields such as medicine, biology, and environmental monitoring. Commercially used photoconductive ultraviolet detectors (silicon-based and photomultiplier tubes) have high sensitivity and mature technology, but the material itself is not resistant to high temperature and high pressure, and is easily corroded by ultraviolet light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/09H01L31/18
CPCH01L31/09H01L31/18Y02P70/50
Inventor 麦文杰邱美佳赵传熙孙鹏
Owner JINAN UNIVERSITY
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