Hybridized perovskite microcrystal light-emitting material and preparation method and application thereof

A technology of microcrystalline materials and perovskite, which is applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of cumbersome preparation methods, unfavorable cleaning and purification of quantum dots, etc., and achieve high luminous efficiency and good stability

Active Publication Date: 2018-09-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, existing inorganic A 4 BX 6 Most of the preparation methods of type perovskite luminescent materials are cumbersome, and organic molecules such as oleic acid (OA) and oleylamine (OLA) will be introduced, which is not conducive to the cleaning and purification of quantum dots in the later stage.

Method used

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  • Hybridized perovskite microcrystal light-emitting material and preparation method and application thereof
  • Hybridized perovskite microcrystal light-emitting material and preparation method and application thereof
  • Hybridized perovskite microcrystal light-emitting material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Embodiment 1 prepares perovskite material CsPb 2 Br 5 sample 1 #

[0083] (1) 1mol PbBr 2 , 4 mol CsBr and 8 μL oleic acid additive, dissolved in 1.1 mL of a fixed mixture of DMF and HBr (volume ratio 1:0.8) at room temperature.

[0084] (2) Use an external water bath to control the temperature of the mixture so that it is completely dissolved. The temperature of the water bath is controlled at 100°C and kept for 30 minutes after complete dissolution, then gradually lower the temperature to 10°C at a cooling rate of 10°C / h.

[0085] (3) After 3 days, the seed crystal grows slowly, and the shape is a cube (1×1×0.2mm 3 ). One month later, CsPb 2 Br 5 Nanocrystals successfully embedded in Cs 4 PbBr 6 The crystals, planted at the bottom of the flask, were illuminated with a UV lamp to reveal green sparkling crystals, which were then washed with butyrolactone and toluene and filtered.

[0086] The resulting sample is 1 # .

Embodiment 2

[0087] Embodiment 2 prepares perovskite material Cs 4 PbBr 6 sample 2 # ~4 #

[0088] The preparation process is the same as in Example 1, except that sample 2 # ~4 # Add 64 μL of oleic acid additive, 8 μL of ethanol additive, and 64 μL of ethanol additive, respectively.

Embodiment 3

[0089] Embodiment 3 prepares perovskite material sample 5 # ~10 #

[0090] The preparation process is the same as in Example 1, and the raw materials and reaction conditions are shown in the table below.

[0091] Table 1

[0092]

[0093]

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Abstract

The invention discloses a hybridized perovskite microcrystal light-emitting material. The hybridized perovskite microcrystal light-emitting material comprises perovskite as shown in formula I AM2X5 and perovskite as shown in formula II A4MX6, wherein A is selected from at least one of CH3NH3<+>, NH=CHNH3<+>, C(NH2)3<+>, R2NH3<+>, Li<+>, Na<+>, Rb<+> or Cs<+>; R2 is selected from hydrogen, C1-C10 alkyl and C1-C10 unsaturated hydrocarbyl; M is metal ions, and the metal is selected from at least one of Ge, Sn, Pb, Sb, Bi, Cu, Mn, Sr, In, Tl and Ag; X is selected from at least one of halogen anions. The hybridized perovskite microcrystal light-emitting material is good in light-emitting efficiency and good in stability.

Description

technical field [0001] The application relates to a preparation method and application of a hybrid perovskite microcrystal luminescent material, belonging to the field of materials and preparation thereof. Background technique [0002] The currently reported perovskite materials are mainly ABX 3 structure of perovskite materials, less about a 4 BX 6 structure of perovskite materials, however it is known that there is no information about the AB 2 x 5 Related reports on the structure of perovskite materials. [0003] So far, the application of quantum dot materials in the display field mainly includes the typical II-VI CdSe quantum dot system, the III-V InP quantum dot system, or the I-III-VI CuInS quantum dot system, etc. . [0004] In recent years, metal halide ABX 3 The emergence of type perovskite materials has further improved people's understanding of the preparation of semiconductor nanocrystals or quantum dot materials by solution methods. In recent research r...

Claims

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Application Information

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IPC IPC(8): C09K11/66C09K11/06
CPCC09K11/06C09K11/665C09K2211/188
Inventor 钟海政黄胜任延东张小丽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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