Quantum dot composite, color filter and display device including the same

By using a combination of indium and phosphorus nanocrystal cores and zinc selenium sulfur shells in quantum dot composites, the problems of overshoot and shell formation of cadmium-based quantum dots are solved, the stability of brightness and color coordinates is achieved, and the reliability of the light-emitting device is improved.

CN113736446BActive Publication Date: 2025-09-26SAMSUNG DISPLAY CO LTD
4 Cites 0 Cited by

Patent Information

Application Number
CN202110586871.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-05-27
Filing Date
2021-05-27
Publication Date
2025-09-26
Estimated Expiration
2041-05-27

AI Technical Summary

Technical Problem

In the existing technology, cadmium-based quantum dots are prone to overshoot when emitting red light, resulting in changes in the color coordinates of the light-emitting device and unstable brightness. In addition, there are technical difficulties in forming a uniform shell layer for cadmium-free quantum dots.

Method used

A quantum dot complex is used, which comprises a semiconductor nanocrystal core containing indium and phosphorus and a semiconductor nanocrystal shell covered with zinc, selenium and sulfur. The arithmetic size of the quantum dots is controlled to be above 8nm, and a stable quantum dot complex is formed through polymerizable monomers and thiol compounds in the matrix.

Benefits of technology

The overshoot phenomenon is suppressed, the brightness stability and color coordinate consistency of the light-emitting device are maintained, and the operational reliability of the quantum dot complex is improved.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

A quantum dot composite, a color filter and a display device including the quantum dot composite, and a quantum dot composition are provided. The quantum dot composite includes: a matrix; and a plurality of quantum dots dispersed in the matrix, wherein the plurality of quantum dots include a semiconductor nanocrystal core containing indium and phosphorus and a semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core, and the semiconductor nanocrystal shell includes zinc, selenium, and sulfur. The plurality of quantum dots have an arithmetic size of approximately 8 nm or greater, wherein the quantum dot composite is configured to emit red light, and wherein when the quantum dot composite is irradiated with light having a wavelength of approximately 450 nm to approximately 470 nm for a period of approximately 500 hours or less, the luminance of the quantum dot composite increases by less than or equal to approximately 1.2% of the initial luminance of the quantum dot composite.
Need to check novelty before this filing date? Find Prior Art