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A Rare Earth Complex Ultraviolet Enhanced Thin Film

A technology of rare earth complexes and thin films, which is applied in the fields of luminescent materials, chemical instruments and methods, electric solid devices, etc., can solve the problems of AlGaN ultraviolet detectors being difficult, difficult to apply to the field of ultraviolet detection, and restricting the improvement of device performance. Achieve the effect of low cost, good effect and easy availability of materials

Active Publication Date: 2021-06-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the material preparation of AlGaN ultraviolet detectors has made staged progress, it is difficult to prepare AlGaN ultraviolet detectors, which seriously restricts the improvement of device performance; the high hardness and high thermal conductivity of SiC materials can greatly improve the damage resistance of detectors , but subject to the SiC device structure, it is more suitable for linear array imaging devices under the existing semiconductor technology
[0003] In addition, the polysilicon electrodes on the surface of conventional detectors have a strong absorption effect on ultraviolet light below 400nm, and general detectors such as CCD and CMOS have weak responses in the ultraviolet band, which is difficult to apply to the field of ultraviolet detection

Method used

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  • A Rare Earth Complex Ultraviolet Enhanced Thin Film
  • A Rare Earth Complex Ultraviolet Enhanced Thin Film
  • A Rare Earth Complex Ultraviolet Enhanced Thin Film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of rare earth complex materials:

[0029] (1) According to EuCl3.6H2O: tetrabutylammonium bromide / 1-hexyl-3-methylimidazolium chloride: thienoyl trifluoroacetone = 1:1:4 The mass corresponding to the molar ratio weighs the reaction raw material;

[0030] (2) Add the tetrabutylammonium bromide / 1-hexyl-3-methylimidazolium chloride and thienoyl trifluoroacetone weighed into a 250ml single-necked bottle;

[0031] (3) Add an appropriate amount of NaOH aqueous solution and mix well;

[0032] (4) Add 20ml of absolute ethanol and dissolve completely at room temperature;

[0033] (5) Prepare the weighed EuCl3·6H2O into a 0.1M aqueous solution and add it to a single-mouth bottle;

[0034] (6) Heating at 50°C, stirring, and reacting for 1.5h;

[0035] (7) Turn off the power supply and let stand at room temperature for 12 hours;

[0036] (8) Suction filtration, a light yellow product is separated out, washed twice with an appropriate amount of distilled water, and t...

Embodiment 2

[0039] Preparation of rare earth complex UV-enhanced film:

[0040] (1) Weigh 0.6g of PVA124 into a 10ml glass bottle, add 4.4g of distilled water, and let stand for 2h (to make PVA swell);

[0041] (2) Add a stirring bar, heat and stir at 85°C until completely dissolved;

[0042] (3) Add 5g of absolute ethanol, heat and stir at 65°C until completely dissolved;

[0043] (4) Take an appropriate amount of complex and add the above-mentioned PVA solution;

[0044] (5) Heat and stir at 40°C for 24 hours to form a mixed luminescent glue;

[0045] (6) Spin-coating or casting to form a film as required;

[0046] (7) Drying in a 40°C oven under normal pressure to form a film;

[0047] (8) Spin-coat a layer of PDMS film on the surface of the prepared reinforcement film;

[0048] (9) Curing under normal pressure in an oven at 40°C.

Embodiment 3

[0050] Application on UV-enhanced linear array CCD:

[0051] (1) Cast the prepared luminescent sol into the photosensitive tank in the linear array CCD;

[0052] (2) Place the CCD poured into the luminescent sol flatly in a drying oven;

[0053] (3) Drying in a 40°C oven under normal pressure;

[0054] (4) A layer of PDMS film was spin-coated on the surface of the prepared reinforced film, and cured under normal pressure in an oven at 40°C.

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Abstract

The invention discloses a rare-earth complex ultraviolet enhanced film, which is a kind of rare-earth complex fluorescent material with high quantum efficiency that can be dissolved in ethanol and a kind of PVA polymer that is easily soluble in water are miscible in ethanol aqueous solution. The oven dries the volatile solvent to form a thin film, which has a high-efficiency ultraviolet enhancement effect. In the preparation process, the material is easy to obtain, the process is simple, the effect is good, and the cost is low. It can be used in the field of ultraviolet photoelectric detection, such as fire detection, organic pollutant detection, and radar. Monitoring, aircraft early warning, etc.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection materials, and in particular relates to a rare earth complex ultraviolet enhanced thin film. Background technique [0002] At present, most of the ultraviolet detection devices used are vacuum multiplication devices, and the quantum efficiency of vacuum multiplication devices is generally only 10-20%, and the working life is short, which seriously restricts the application range of ultraviolet load detection. In recent years, new wide-bandgap ultraviolet semiconductor imaging devices have developed rapidly and their performance has been continuously improved. GaN and SiC are two typical solar-blind ultraviolet semiconductor detectors. GaN UV detectors have the advantages of high quantum efficiency, high temperature resistance and chemical corrosion resistance. In 2005, R.McClintock and others from Northwestern University in the United States developed a 320256 sun-blind AlGaN UV f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/02H01L51/46H01L51/48H01L51/54
CPCC09K11/025C09K11/06C09K2211/182H10K71/12H10K85/351H10K30/00Y02E10/549
Inventor 陆红波李志远郑安东夏果王国栋
Owner HEFEI UNIV OF TECH