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Core-shell quantum dot material highly compatible to packaging silicon rubber and preparation method of core-shell quantum dot material

A core-shell quantum dot and quantum dot technology, which is applied in the field of nano-fluorescent materials, can solve the problems of increased surface defects of materials, uneven and unreliable growth of ligands, and poor control of the proportion of ligands, so as to simplify the preparation process. Effect

Active Publication Date: 2018-08-24
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because PDMS is a long-chain polymer, it will produce steric hindrance effects. The obtained product has two kinds of ligands, which are not easy to control, and the growth of the ligands is uneven and unreliable due to the steric hindrance effect between the long-chain ligands. , there are several deficiencies in the increase of material surface defects

Method used

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  • Core-shell quantum dot material highly compatible to packaging silicon rubber and preparation method of core-shell quantum dot material
  • Core-shell quantum dot material highly compatible to packaging silicon rubber and preparation method of core-shell quantum dot material
  • Core-shell quantum dot material highly compatible to packaging silicon rubber and preparation method of core-shell quantum dot material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: CdSe / / CdS / ZnS--Zn-PDMS (CdSe / / CdS / ZnS core-shell structure quantum dots containing Zn-PDMS functional ligand structure) silica gel highly compatible quantum dot material

[0037] The first step is the preparation of Zn-PDMS (zinc-terminated organosiloxane polymer) functional ligand

[0038] In the glove box (the water and oxygen content does not exceed 0.1ppm), under stirring, drip 1M (mmol / mL) dimethyl zinc toluene solution (solution A) into 0.5M carboxyl-terminated polydimethylsiloxane In alkane (viscosity cSt15-30, referred to as DMS-B12) octadecene solution (solution B), until there are no bubbles in the mixed solution, the volume ratio of the mixed solution is A:B=1:5, and stir at room temperature for 2 hours, and the stirring speed is 350 revolutions per minute to obtain Zn-PDMS ligand solution C;

[0039] The second step is to prepare a CdSe / / CdS / ZnS core-shell structure quantum dot solution

[0040] Under ordinary circumstances, dissolve CdSe / / CdS / ZnS core-s...

Embodiment 2

[0049] Example 2: CdSe / / ZnS--Al-PDMS structure silica gel highly compatible quantum dot material

[0050] The first step is the preparation of Al-PDMS (aluminum terminated organosiloxane polymer) functional ligand

[0051] In the glove box (the water and oxygen content does not exceed 0.1ppm), under stirring, drip 1M (mmol / mL) trimethylaluminum n-hexane solution (solution A) into the 1M carboxyl-terminated polysiloxane 18 In the olefin solution (solution B), until there are no bubbles in the mixed solution, the volume ratio of the mixed solution is A:B≈1:10, and the mixture is stirred at room temperature for 2 hours, and the stirring speed is 350 revolutions per minute to obtain Al-PDMS ligand solution C;

[0052] Except that in the second step, the solution solute is prepared as CdSe / / ZnS core-shell quantum dots, and the other steps are the same as in Example 1.

[0053] The material of the present invention obtained in Example 2 has a structure such as Figure 8 Shown is a "core / / s...

Embodiment 3

[0054] Example 3: CuInSe / / ZnS---Zn-PDMS structure silica gel highly compatible quantum dot material

[0055] Except for the second step, the solute of the prepared solution is CuInSe / / ZnS core-shell quantum dots, and the other steps are the same as in Example 1.

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Abstract

The invention discloses a core-shell quantum dot material highly compatible to packaging silicon rubber and a preparation method of the core-shell quantum dot material. The material comprises three portions including a quantum dot core, a quantum dot shell and a quantum dot surface functional ligand layer sequentially from inside to outside. The surface functional ligand layer is formed by singleligands (positive ion terminated organic silicon polymer) and comprises a positive-ion-rich protective layer at a quantum dot surface connection shell end and a siloxane polymer organic silicon chainlayer at a far shell end. After normal-temperature mixing and heating and curing of the material along with packaging silicon rubber, fluorescence decay is avoided, and on the contrary, quantum efficiency can be even improved by 10% or above, so that silicon rubber compatibility of the quantum dot in spontaneous agglomeration resistance and catalytic curing agent damage resistance is realized.

Description

Technical field [0001] The invention belongs to the field of nano fluorescent materials, and specifically relates to a core-shell quantum dot material highly compatible with encapsulated silica gel and a preparation method thereof. Background technique [0002] At present, by carrying LED chip packaging technology, traditional fluorescent materials as light-color conversion media have been widely used in lighting display and other fields. In the LED chip packaging process, packaging silicone and silicone-based packaging processes are currently the most mature and widely used packaging materials and technologies for industrialization. As one of the new fluorescent materials, quantum dots have shown great potential in the field of lighting and display. However, it is difficult for quantum dots to be compatible with LED encapsulated silica gel, which is manifested in two points: On the one hand, the organic composition of the conventional surface organic ligands of quantum dots is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/02B82Y20/00B82Y30/00H01L33/50
CPCB82Y20/00B82Y30/00C09K11/025C09K11/883H01L33/502
Inventor 徐庶谢杨杨耿翀刘懿萱邢玮烁张新素毕文刚
Owner HEBEI UNIV OF TECH
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