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Method for improving performance of deep ultraviolet photoelectric detector

An electrical detector, deep ultraviolet light technology, applied in chemical instruments and methods, circuits, electrical components, etc., can solve problems such as hindering applications

Active Publication Date: 2022-06-07
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cesium copper iodide CsCu reported in the current literature research 2 I 3 Although it can have a photoelectric response in the deep ultraviolet band, the sensitivity is only 22.1mA / W, which hinders its further application in the field of deep ultraviolet photodetection

Method used

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  • Method for improving performance of deep ultraviolet photoelectric detector
  • Method for improving performance of deep ultraviolet photoelectric detector
  • Method for improving performance of deep ultraviolet photoelectric detector

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Embodiment 1

[0034] A method to improve the performance of deep ultraviolet photodetectors, including the following steps:

[0035] 1) Prepare CsCu 2 I 3 Single crystal, CsCu is grown by anti-solvent vapor-assisted method 2 I 3 Single crystal;

[0036] 2) The N,N-dimethylformamide and dimethyl sulfoxide are mixed well to produce a 5 ml mixed solution, and the mixing volume ratio of N,N-dimethylformamide and dimethyl sulfoxide is 4:1;

[0037] 3) The raw material 1.299g cesium iodide and 0.952g cuprous iodide are added to the above mixed solution, stirred, and need to be continuously stirred at 60 °C magnetic force until a clear solution is obtained;

[0038] 4) Slowly add anhydrous methanol to the above solution dropwise until the white precipitate does not disappear;

[0039] 5) Then filter out the white pellet with a filter and transfer the saturated solution to a vial;

[0040] 6) Place the small bottle containing the saturated solution in a large beaker filled with an appropriate amount of...

Embodiment 2

[0045] A method to improve the performance of deep ultraviolet photodetectors, including the following steps:

[0046] 1) Prepare CsCu 2 I 3 Single crystal, CsCu is grown by anti-solvent vapor-assisted method 2 I 3 Single crystal;

[0047] 2) The N,N-dimethylformamide and dimethyl sulfoxide are mixed well to produce a 5 ml mixed solution, and the mixing volume ratio of N,N-dimethylformamide and dimethyl sulfoxide is 4:1;

[0048] 3) The raw material 1.299g cesium iodide and 0.952g cuprous iodide are added to the above mixed solution, stirred, and need to be continuously stirred at 60 °C magnetic force until a clear solution is obtained;

[0049] 4) Slowly add anhydrous methanol to the above solution dropwise until the white precipitate does not disappear;

[0050] 5) Then filter out the white pellet with a filter and transfer the saturated solution to a vial;

[0051] 6) Place the small bottle containing the saturated solution in a large beaker filled with an appropriate amount of...

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Abstract

The invention discloses a method for improving the performance of a deep ultraviolet photoelectric detector, which comprises the following steps of: preparing a CsCu2I3 single crystal, growing the CsCu2I3 single crystal by adopting an anti-solvent steam auxiliary method, uniformly mixing N, N-dimethylformamide and dimethyl sulfoxide according to a mixing volume ratio of 4: 1 to prepare 5ml of mixed solution, and preparing the CsCu2I3 single crystal by adopting an anti-solvent steam auxiliary method to prepare the CsCu2I3 single crystal. The preparation method comprises the following steps: adding 1.299 g of cesium iodide and 0.952 g of cuprous iodide into a mixed solution, stirring, continuously stirring by magnetic force at 60 DEG C until a clear solution is obtained, slowly dropwise adding absolute methanol into the solution until white precipitate does not disappear, and heating and evaporating a saturated solution to obtain the CsCu2I3 crystal. The synthesized CsCu2I3 crystal is soaked in water, the photoelectric response characteristic of the CsCu2I3 perovskite is greatly improved, the CsCu2I3 crystal has high responsivity and quantum efficiency, the performance of the CsCu2I3 crystal is superior to that of most reported full-inorganic lead-free perovskite photoelectric detectors, the preparation method is simple, the cost is low, and the CsCu2I3 crystal has great potential in the aspect of future photoelectric detection application.

Description

Technical field [0001] The present invention relates to the field of deep ultraviolet photodetector technology, specifically a method of improving the performance of deep ultraviolet photodetectors. Background [0002] Ultraviolet light detection has important applications in astronomical observation, safe communication between satellites and underwater submarines, national defense and military early warning, flame detection, high-voltage corona monitoring, food hygiene and disinfection, drinking water purification and other fields. For example, sunlight radiation is absorbed by the atmospheric ozone layer, and the spectral intensity of the 220-300 nm wavelength range after reaching the Earth is extremely weak, called the heliopause blind zone. Using the ultraviolet spectrum of this band to communicate between satellites outside the atmosphere, the receiving equipment on the ground is undetectable, and high-confidential satellite communication can be realized. High-voltage transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B33/00C30B29/10C30B7/02H01L31/18
CPCC30B33/00C30B29/10C30B7/02H01L31/18Y02P70/50
Inventor 潘书生白凯磊范梓豪祝梓博
Owner GUANGZHOU UNIVERSITY