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Non-ligand-assisted perovskite doped multi-emission material and preparation method thereof

A technology of doping material and perovskite, applied in the field of dual emission perovskite doping material, can solve the problems of easy aggregation and sedimentation of nanoparticles, affecting material properties, unfavorable application, etc., to avoid aggregation and sedimentation, good physical properties, The effect of reducing the number of luminous layers

Active Publication Date: 2021-08-13
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems existing in the doping of perovskite materials in the existing reports: (1) the doping process requires heating; (2) the doped nanoparticles are easy to aggregate and settle, which is not conducive to the later application ( Figure 8 ); (3) After the preparation of the material is completed, certain defects will be brought to the surface of the material during purification, which will affect the performance of the material

Method used

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  • Non-ligand-assisted perovskite doped multi-emission material and preparation method thereof
  • Non-ligand-assisted perovskite doped multi-emission material and preparation method thereof
  • Non-ligand-assisted perovskite doped multi-emission material and preparation method thereof

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Embodiment 1

[0070] Hybrid perovskite CH 3 NH 3 PbCl 3 / Mn of PVDF 2+ Doped double-emission material and preparation method thereof, the preparation method is as follows:

[0071] (1) Dissolve the polymer in an organic solvent and stir continuously until it is completely dissolved to obtain a uniform and viscous polymer solution. The mass ratio of the polymer to the solvent is controlled, the mass fraction of the polymer solution is 8.8%, and the first solution is obtained. The organic matter is polyvinylidene fluoride (PVDF), and the solvent is N,N-dimethylformamide (DMF).

[0072] (2) Mix the main inorganic halide salt A, doped inorganic halide salt and organic amine halide salt powder, and control the molar ratio as organic amine halide salt: inorganic halide salt (main inorganic halide salt A and doped inorganic halide salt salt)=0.9:1. In the part of the inorganic halide salt, the molar ratios of the control doped halide salt and the main inorganic halide salt A are 4:1, 3:1, 2:...

Embodiment 2

[0077] Hybrid perovskite CH 3 NH 3 PbCl x Br 3-x / PVDF,CH 3 NH 3 PbCl x I 3-x / Mn of PVDF 2+ Doped double-emission material and preparation method thereof, the preparation method is as follows:

[0078] Experimental method differs only in step (2) with embodiment 1

[0079] (2) Mix the main inorganic halide salt A, doping halide salt and organic amine halide salt powder, and control the molar ratio as organic amine halide salt: inorganic halide salt (main inorganic halide salt A and doping halide salt )==0.9:1. In the inorganic halide salt part, the molar ratio of the doping halide salt and the main inorganic halide salt A is controlled to be 2:1 (the total amount of the doping halide salt and the main inorganic halide salt A remains unchanged), wherein the control of Br - / Cl - and I - / Cl - The molar ratio is not greater than 1.

[0080] The doping halide salt is MnCl 2 and MnBr 2 , the main inorganic halide salt A is PbCl 2 and PbBr 2 and the organic amine...

Embodiment 3

[0083] Inorganic perovskite CsPbCl 3 / Mn of PVDF 2+ Doped double-emission material and preparation method thereof, the preparation method is as follows:

[0084] Experimental method differs only in step (2) with embodiment 1

[0085] (2) The main inorganic halide salt A, the doped inorganic halide salt and the main inorganic halide salt B are mixed, and the molar ratio is controlled to be the main inorganic halide salt B: (the main inorganic halide salt A and the doped inorganic halide salt )=1:1. In the part of the inorganic halide salt, the molar ratio of the doping halide salt to the main inorganic halide salt A is controlled to be 2:1 (the total amount of the doping halide salt and the main halide salt remains unchanged).

[0086] Among them, the main inorganic halide salt A is PbCl 2 , the doped halide salt is MnCl 2 , the main inorganic halide salt B is CsCl.

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Abstract

The invention relates to a non-ligand-assisted perovskite doped multi-emission material and a preparation method thereof. The preparation method of the perovskite doped material comprises the following steps: 1) dissolving a polymer in an organic solvent to obtain a first solution containing the polymer; 2) adding halide salt into the first solution, and uniformly conducting mixing to obtain a second solution; and 3) performing vacuum drying on the second solution to obtain a perovskite doped material. The halide salt in the step 2) is a composition of a main body inorganic halide salt A and a doped halide salt and a main body inorganic halide salt B, or is a composition of a main body inorganic halide salt A and a doped halide salt and an organic amine halide salt. The invention also discloses the perovskite doped material obtained by the method. The preparation method is simple, low in cost and suitable for large-area production, the crystallinity of the material is good, the dispersity of nano-particles is good, and double-band emission is effectively achieved.

Description

technical field [0001] The invention relates to a non-ligand-assisted double (multiple) emission perovskite doped material, in particular to a universal and convenient preparation method. Background technique [0002] As a strategic electronic material, semiconductor luminescent materials have important applications in biological imaging, display, laser, solid-state lighting, etc. In the current solid-state lighting white LEDs, the three-primary color composite light scheme is basically adopted, that is, the composite white LED is prepared by combining blue luminescent material / green luminescent material / red luminescent material into a composite multi-layer structure, which causes the LED's In addition to plating electrodes, holes, and electron transport layers on both ends of the device, it is also necessary to prepare multiple layers of fluorescent materials with different luminous colors inside. The multi-layer luminescent material makes the device thicker, which is not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K3/16C08K5/17C08J5/18C09K11/02C09K11/66
CPCC08J5/18C09K11/025C09K11/664C09K11/665C08J2327/16C08K3/16C08K5/17Y02B20/00Y02E10/549
Inventor 李佳白宪伟
Owner SHENZHEN INST OF ADVANCED TECH
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