Quantum dot LED and manufacturing method thereof

Abstract

The invention provides a quantum dot LED. The quantum dot LED comprises a ceramic substrate, a blue chip and a quantum dot phosphor layer sequentially arranged on the surface of the ceramic substrateand a protection layer covering the blue chip and the quantum dot phosphor layer, wherein the protection layer comprises at least one inorganic blocking layer and at least one organic protection layer, the inner-most layer of the protection layer is the inorganic blocking layer, and the outer-most layer is the organic protection layer. The quantum dot LED is advantaged in that blocking capabilityfor water and oxygen can be improved through providing the organic protection layer on the outer side of the inorganic blocking layer, defects of the inorganic blocking layer can be filled by the organic protection layer, cracks generated by the inorganic blocking layer are prevented from further expanding, and thereby light emitting performance and service life of the quantum dot LED are finallyand substantially improved.

Description

technical field [0001] The invention belongs to the technical field of quantum dot optical films, in particular to a quantum dot LED and a preparation method. Background technique [0002] Due to the narrow emission peak of quantum dots, the emission wavelength can be adjusted with the size, so the color gamut can be increased from the current NTSC72% to 100%, and it has been widely used in backlight products. However, since quantum dots are exposed to water and oxygen environment, the fluorescence efficiency will decrease rapidly and irreversibly, so the encapsulation of quantum dots needs to be well isolated from water and oxygen. [0003] At present, some people deposit encapsulant or inorganic layer on the surface of quantum dot phosphor layer to block water and oxygen. However, due to the high oxygen permeability and water permeability of the encapsulant, it cannot block water and oxygen well. The inorganic layer will crack over time, and the ability to block water an...

AI Technical Summary

Problems solved by technology

However, because the oxygen permeability and water permeability of the encapsulant are too high, it cannot block water and oxygen well.

However, the inorganic layer will crack as time goes on, and the ability to block water and oxygen will drop rapidly, and finally the luminous performance of quantum dot LED will be greatly reduced.

Images