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Preparation of composite double-functional perovskite material with joint 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 high power consumption and high cost of use, and achieve the effect of avoiding high temperature process, reducing defect density and simple process

Active Publication Date: 2019-01-18
广东远合工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 composite double-functional perovskite material with joint thermoluminescence and photoluminescence properties
  • Preparation of composite double-functional perovskite material with joint thermoluminescence and photoluminescence properties
  • Preparation of composite double-functional perovskite material with joint thermoluminescence and photoluminescence properties

Examples

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Effect test

example 1

[0025] 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, keep 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.

[0026] 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.

[0027] The...

example 2

[0029] 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 .

[0030] 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

[0033] 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 2Br 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 2ul / s, heated continuously for 2h, and added to anhydrous ethanol / ether system after cooling 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 Ga 0.14 Er 0.3 I 3 CI.

[0034] 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 h, and then nanofiltration was ...

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Abstract

The invention provides preparation of a composite double-functional perovskite material with joint thermoluminescence and photoluminescence properties. The preparation has the advantages that by adopting the inorganic-organic perovskite nanometer material, the size, shape and component proportional ratio are adjusted to control the photoluminescence area, thereby realizing the broad-spectrum transmission of 400 to 900nm; by adopting the composite modifying of thermally-induced crystals, the light emitting efficiency of various colors can reach 80% or above, and the light emitting efficiency ofred color can reach 90%; perovskite quantum dots and the thermoluminescence crystals form a core-shell nanometer structure, and the particle size and film thickness of the core-shell nanometer layerare adjusted and controlled, so that the property of the material can be effectively adjusted, the stability is high, the reflectivity is high, and the light emitting property is high; the high radiation heat of an LED (light emitting diode) chip semiconductor is effectively utilized, the heat loss of LED is further reduced, and the light emitting efficiency and light strength are improved.

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 [1-2] from the way of producing white light. 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 Applications(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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