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Low-cost perovskite quantum dot display material and preparation method

A quantum dot and perovskite technology, applied in the field of low-cost perovskite quantum dot display materials and preparation, can solve problems such as poor stability, threats to environmental protection, and restrictions on industrialization development, and achieve high stability and self-absorption effects Weak, low-cost effect

Inactive Publication Date: 2017-06-30
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported organic-inorganic lead (Pb)-based perovskite materials contain toxic lead (Pb) materials, which pose a threat to environmental protection and have poor stability.
These problems greatly restrict the development of its future industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. The core powder material is prepared according to the expression (Bi0.5Sn0.5)X4+0.01B2O3 ingredients, the raw materials are bismuth trioxide, boron oxide, and tin iodide, adding abrasives and balls, and adopting wet ball milling 8 Hours; after the ball-milled inner core material is discharged, it is dried by freeze drying; solid-phase synthesis reaction at high temperature for 6 hours becomes the inner core material of perovskite structure, and the high temperature is 850 ° C; further, the pre-fired The inner core material was pulverized by a fluidized bed jet mill to obtain a powder with good dispersibility and a particle size of 3 μm. The gas used in the jet mill was nitrogen; the powder was added to the colloidal liquid and entered into a high-speed colloid mill for grinding for 1 hour. The colloidal liquid is mainly composed of organic amines, and the weight ratio of the powder to the colloidal liquid is 1:5, and finally a perovskite nano-quantum dot core powder w...

Embodiment 2

[0031] 1. Preparation of core powder material, according to the expression (Bi0.7Sn0.3)X4+0.05B2O3 ingredients, raw materials are bismuth acetate, boric acid, tin chloride, adding abrasives and balls, using wet ball milling for 9 hours; After the ball-milled inner core raw material is discharged, it is dried by freeze-drying; solid-phase synthesis reaction at high temperature for 12 hours becomes the inner core material of perovskite structure, and the high temperature is 800°C; further, the pre-fired inner core material After being pulverized by a fluidized bed jet mill, a powder with good dispersibility and a particle size of 2 μm is obtained. The gas used in the jet mill is nitrogen; the powder is added to the colloidal liquid, and enters the high-speed colloidal mill for grinding for 3 hours. The composition of the colloidal liquid It is mainly organic amine, and the weight ratio of powder and colloid is 1:2. Finally, a perovskite nano-quantum dot core powder with a particl...

Embodiment 3

[0037] 1. The core powder material is prepared according to the expression (Bi0.8Sn0.2)X4+0.1B2O3 ingredients, the raw materials are bismuth acetate, boric acid, tin iodide, adding abrasives and grinding balls, using wet ball milling for 10 hours; After the ball-milled inner core material is discharged, it is dried by freeze-drying method; solid-phase synthesis reaction is carried out at a high temperature for 18 hours to become an inner core material with a perovskite structure, and the high temperature temperature is 750°C; After being pulverized by a fluidized bed jet mill, a powder with good dispersibility and a particle size of 1 μm is obtained. The gas used in the jet mill is nitrogen; the powder is added to the colloidal liquid, and enters the high-speed colloidal mill for grinding for 6 hours. The composition of the colloidal liquid It is mainly organic amine, and the weight ratio of powder and colloid is 1:1, and finally a perovskite nano-quantum dot core powder with a...

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PUM

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Abstract

The invention provides a low-cost perovskite quantum dot display material. The low-cost perovskite quantum dot display material structurally consists of a spherical kernel core and a surface housing layer, wherein the surface housing layer is made of zinc sulfide; the structural formula of the kernel is (BizSn1-z)X4, wherein BizSn1-z and X form a coordination octahedral structure, and X is any one of Cl, Br and I. The kernel is prepared in a solid phase synthesis manner, and then through a homogenizing reaction and a double decomposition reaction, the zinc sulfide is generated in the kernel and a coating layer is formed; finally, filtering, cooling crystallisation and centrifugal separation are performed, so that the low-cost perovskite quantum dot display material is prepared. The temperature and the material compounding ratio are adjusted and controlled, so that the yield of fluorescence quantum achieves 72%; through a component adjusting and controlling strategy, the luminous wavelength of the quamtum dots can be continuously adjusted in the range from 345 nm to 710 nm.

Description

technical field [0001] The invention belongs to the field of photoelectric materials and nanometer materials, and in particular relates to a low-cost perovskite quantum dot display material and a preparation method. Background technique [0002] Quantum dots, also known as nanocrystals, generally have a particle size between 1 and 10nm. Since electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy level structure with molecular characteristics. Can emit fluorescence. Based on quantum effects, quantum dots have broad application prospects in solar cells, light-emitting devices, optical biomarkers and other fields. Scientists have invented many different methods to make quantum dots, and expect this nanomaterial to have great potential for application in nanoelectronics in the 21st century. [0003] Semiconductor colloidal quantum dots have outstanding characteristics such as solution preparation, easy processing, adjustable c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/54C09K11/74B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/02C09K11/54C09K11/7428C09K11/7485
Inventor 陈庆曾军堂王镭迪
Owner CHENDU NEW KELI CHEM SCI CO LTD
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