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An organic-inorganic hybrid halide luminescent material and its preparation method and application

A technology of luminescent materials and halides, applied in luminescent materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of poor film-forming charge transport, etc., achieve good stability, simple preparation method, and small quantum yield attenuation Effect

Active Publication Date: 2022-02-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the PLQY of non-lead halides based on quantum dots is very high, due to the existence of long organic chains, their film formation and charge transport properties are relatively poor

Method used

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  • An organic-inorganic hybrid halide luminescent material and its preparation method and application
  • An organic-inorganic hybrid halide luminescent material and its preparation method and application
  • An organic-inorganic hybrid halide luminescent material and its preparation method and application

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preparation example Construction

[0055] A method for preparing an organic-inorganic hybrid halide luminescent material of the present invention comprises the following steps:

[0056] S1, take the molar ratio as AX:CuX y ≈0.1~3 precursor drugs, namely quaternary ammonium salt AX and copper halide / cuprous CuX y , dissolved in an organic solvent with a concentration of 0.2-1mM, stirred at room temperature in an inert gas atmosphere for 3-6 hours until the powder is dissolved in the solution, then left to stand for 1-5 hours until the solution is clear, and then filtered the solution with a filter head;

[0057] Put the weighed quaternary ammonium salt AX and copper halide / cuprous in an agate mortar, then place it in an inert gas atmosphere, put the mortar on a heating platform and start grinding, and the grinding heating temperature is 100-140°C. The time is 2 to 4 hours, and the annealing is continued for 1 to 2 hours after sufficient grinding to obtain the desired powder.

[0058] The solvent used for disso...

Embodiment 1

[0067] First, weigh 57.4 mg of cuprous bromide and 168.128 mg of tetraethylammonium bromide and place them in an agate mortar, then put them into a glove box with an inert gas atmosphere for grinding. Grinding on the bench. When heating, the temperature is 100°C, and the precursor drug is ground until the powder particles become smaller and uniform, and the time is 4 hours.

[0068] figure 1 Be that described quaternary ammonium salt is the molecular structural formula of tetraethyl ammonium bromide.

[0069] figure 2 Photographs of the powder prepared by grinding in Example 1 of the present invention under a fluorescent lamp and under an ultraviolet lamp;

[0070] image 3 It is the PL emission peak of the powder prepared by grinding in Example 1 of the present invention;

[0071] Figure 4 It is the CIE diagram of the powder prepared by grinding in Example 1 of the present invention;

Embodiment 2

[0073] First, weigh 76.2 mg of cuprous iodide and 168.128 mg of tetraethylammonium bromide and place them in a serum bottle, then add 1 ml of dimethyl sulfoxide as a solution, add polytetrafluoroethylene magnets in a nitrogen-filled The glove box was thoroughly stirred. After stirring for 3 hours, the solution was left to stand for 1 hour until the solution became clear. Aspirate 200 microliters of the precursor solution with a pipette gun, and drop it on the cleaned substrate (for example, glass slide / quartz slide / ITO glass slide). At a rotational speed of 1000 rpm for 80 seconds, the spin-coated substrate was moved to an annealing table, and annealed at a temperature of 80° C. for 80 minutes to obtain a halide film.

[0074] Figure 5 For the PL spectrum and absorption spectrum of the prepared film, it can be seen that the prepared halide has an emission peak with a half-maximum width of 80nm at 462nm, and its absorption peak position is at 280nm. It can be seen from the s...

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Abstract

The invention discloses an organic-inorganic hybrid halide luminescent material and its preparation method and application. The luminescent material is an organic-inorganic hybrid copper-based halide based on a quaternary ammonium salt, and its structural formula is A m Cu n x (m+n) , where A is the organic chain part of the quaternary ammonium salt, X is the halogen ion Cl ‑ , Cl ‑ , Br ‑ , I ‑ One or any combination of several anions, m and n are integers from 1 to 3, respectively. The organic-inorganic hybrid halide prepared based on the quaternary ammonium salt and the copper base has the characteristics of high PLQY, tunable spectrum, good stability in the atmosphere, and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials, and in particular relates to an organic-inorganic hybrid halide luminescent material and its preparation method and application, in particular to a method of using a quaternary ammonium salt as an A-site ion organic-inorganic halide and its application. Background technique [0002] Organic-inorganic hybrid lead-based perovskites (APbX 3 ) is an emerging hot material, in which the A-site ions are generally composed of monovalent inorganic ions Cs + , Rb + , CH 3 NH 3 + , CH 5 N 2 + and other components, X generally refers to the halogen ion Cl - , Br - , I - Or a combination of these several halide ions in different proportions. Due to its high carrier mobility, long exciton diffusion length, tunable energy band with the ratio of halogen ions, high quantum fluorescence yield, and full-spectrum tunability of its spectrum , narrow full width at half maximum, and low cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/61C07C211/63C07C209/68
CPCC09K11/615C07C211/63C07C209/68
Inventor 吴朝新刘晓云袁方焦博董化侯洵
Owner XI AN JIAOTONG UNIV
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