LED coating for encapsulating quantum dots by multiple layers and preparation method thereof

Abstract

The invention relates to an LED coating for encapsulating quantum dots by multiple layers. The LED coating comprises a traditional encapsulation material layer and a plurality of encapsulation particles of quantum dots and scattered particles, which are scattered in the traditional encapsulation material layer, wherein from inside to outside, the encapsulation particle of the quantum dot and the scattered particle comprises a quantum dot, a compatible polymer layer and a water and oxygen barrier film layer in sequence, and a plurality of inorganic nano scattered particles are scattered in thecompatible polymer layer. The compatible polymer and the quantum dot are highly compatible, so that the high surface energy property of the quantum dot is prevented from damaging colloid crosslinking,and the quantum dot is more stable. According to the LED coating, the quantum dot is wrapped in the compatible polymer and then is crushed into particles, the surface of the particle is encapsulatedby the water and oxygen barrier film layer, and finally, the obtained particles are scattered in another colloid, so as to prepare the quantum dot coating, therefore, the quantum dots are less likelyto gather so as to maintain the luminescence performance; and the multilayer encapsulation structure improves the water and oxygen blocking performance of the quantum dot coating.

Description

technical field [0001] The invention relates to the technical field of LED luminescent material packaging, in particular to an LED coating for multilayer packaging of quantum dots and a preparation method thereof. Background technique [0002] In recent years, quantum dots (Quantum Dots), as a luminescent material with a particle size of less than 10 nanometers, have the advantages of wide excitation spectrum, narrow fluorescence spectrum, and high fluorescence efficiency. A generation of luminescent materials. As an optical film, quantum dot coating has attracted much attention in the field of LED packaging, such as LCD backlight module, LED lamp remote fluorescent film, etc., which can significantly improve the color saturation of the device, increase brightness, reduce power consumption, etc. . Quantum dots have broad development prospects. [0003] Due to the quantum characteristics of quantum dots such as quantum size effects, surface effects, and small size effects,...

AI Technical Summary

Problems solved by technology

[0003] Due to the quantum characteristics of quantum dots such as quantum size effects, surface effects, and small size effects, the requirements for colloid properties in optical packaging applications are extremely high. Seeking high-quality compatible colloids has always been a research hotspot in the field of packaging. Transmission and non-reflection lead to strong absorption of light, which is easy to cause quenching of quantum dots, limiting its further application

At the same time, at present, the stability of quantum dots in practical applications is poor. How to ensure the long-term stability of quantum dots during use has become an urgent problem to be solved.

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