Preparation of a composite bifunctional perovskite material with combined thermoluminescence and photoluminescence properties

A technology of thermoluminescence and photoluminescence, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of raising the cost of use and consuming large electric energy, and achieve the goal of reducing defect density, avoiding high-temperature processes, and environmental protection conditions Effect

Active Publication Date: 2021-06-22
广东远合工程科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Especially for high-power planar cluster packaging modules, the cooling method of forced heat exchange will consume a lot of power and increase the cost of use

Method used

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  • Preparation of a composite bifunctional perovskite material with combined thermoluminescence and photoluminescence properties
  • Preparation of a composite bifunctional perovskite material with combined thermoluminescence and photoluminescence properties
  • Preparation of a composite bifunctional perovskite material with combined thermoluminescence and photoluminescence properties

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example 1

[0023] Preparation of perovskite quantum dot materials: SnI 2 (DMSO) prepared 1.0M precursor solution in diphenyl ether solution, mixed with 1ml oleylamine and heated to 250°C, under nitrogen protection, injected CsBr diphenyl ether solution (0.5M concentration) into the solution at a speed of 1ul / s. Close the reaction system, continue heating for 1h, add absolute ethanol / ether system after the reaction is cooled, centrifuge to obtain a solid, and vacuum dry for 1h to finally obtain the perovskite quantum dot material CsSn 2 I 4 Br.

[0024] Preparation of surface-modified thermoluminescent crystals: a-A 2 o 3 : After C crystal and graphene quantum dot alcohol solvent are mixed at a mass ratio of 10:1, add 2ml of methanesulfonic acid, place in a hydrothermal reaction kettle, heat at 120°C, and react for 4 hours to form a milky black liquid, then oscillate with microwave 1h, using nanofiltration to obtain modified thermoluminescent crystal Graphene@a-A 2 o 3 :C.

[0025]...

example 2

[0027] Preparation of perovskite quantum dot materials: SnBr 2 with TiCl 4 According to the mass ratio of 6:1, it was dissolved in 1,3-dimethyl-imidazolinone solution to prepare a 1.5M precursor solution, heated to 180 degrees, and under the protection of nitrogen, CH 3 NH 2 The diphenyl ether solution of Br (concentration 1M) was injected into the closed reaction system at a rate of 1 ul / s, and the heating was continued for 4 hours. After the reaction was cooled, an anhydrous ethanol / ether system was added to centrifuge to obtain a solid, and the perovskite was finally obtained by vacuum drying for 1 hour. Quantum dot materials (CH 3 NH 2 )SnTi 0.5 Br 3 CI 2 .

[0028] Preparation of surface-modified thermoluminescent crystals: HfO 2 After mixing crystals with phytic acid and triphenylphosphine at a mass ratio of 20:0.5:0.5, add 2ml of pyrrolidone, place in a hydrothermal reaction kettle, heat at 120°C, and react for 2 hours to form a milky liquid, then oscillate with...

example 3

[0031] Preparation of perovskite quantum dot materials: Pb(AcO) 2 , Ga 2 o 3 with ErNO 3 According to the mass ratio of 3:0.5:0.1, dissolve in HI solution to prepare 1.5M precursor solution, heat to 220 degrees, under nitrogen protection, CH 3 NH 2 Br and LiCl are mixed and dissolved in diphenyl ether (concentration: 1.5M) at a ratio of 1:1, injected into a closed reaction system at a speed of 2 ul / s, heated continuously for 2 hours, added to anhydrous ethanol / ether system and centrifuged after the reaction is cooled to obtain solid, vacuum dried for 1h to finally obtain the perovskite quantum dot material (CH 3 NH 2 ) 0.5 Li 0.5 Pb 0.83 Ga0.14 Er 0.3 I 3 CI.

[0032] Preparation of surface-modified thermoluminescent crystals: mix AlN:Ta crystals with graphdiyne (Graphdiyne) at a mass ratio of 20:1, add 2ml of pyrrolidone, place in a hydrothermal reactor, heat at 160°C, react for 2 hours, and become milky The liquid was then subjected to microwave oscillation for 1...

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Abstract

For the preparation of a composite bifunctional perovskite material with combined thermoluminescence and photoluminescence properties proposed by the present invention, by using inorganic-organic perovskite nanomaterials, the size, shape and composition ratio can be adjusted by adjusting Its photoluminescence region achieves broad-spectrum emission of 400-900nm, and at the same time, the composite modification of thermotropic crystals can make the luminous efficiency of various colors reach more than 80%, and the red light can reach 90%. Perovskite quantum dots and thermoluminescent crystals form a core-shell nanostructure. By adjusting the particle size and film thickness of the core-shell layer, the material properties can be effectively adjusted, with high stability, high refractive index, and high luminescence performance, which can effectively utilize LEDs The high radiant heat of the chip semiconductor further reduces LED heat loss and increases luminous efficiency and light intensity.

Description

technical field [0001] The invention relates to the preparation of a composite bifunctional perovskite material combining thermoluminescence and photoluminescence properties, belonging to the technical field of luminescence and photos. Background technique [0002] White light LED is a new generation of solid-state lighting technology, which has the advantages of high efficiency, energy saving, green environmental protection, etc., and has been widely used in the fields of stage lighting, liquid crystal display and advertising. White light LEDs can be roughly divided into two types: non-phosphor powder type and phosphor powder type from the way of producing white light [1-2]. In the white light LED without phosphor powder, the white light is obtained by mixing the three primary color LEDs that emit light separately, and the white light with different effects can be obtained by adjusting the light emission ratio of the three primary color LEDs. [0003] In WLED light sources...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/06C09K11/66C09K11/67C09K11/64
CPCC09K11/025C09K11/06C09K11/665C09K11/675
Inventor 方倩崔波
Owner 广东远合工程科技有限公司
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