Reddish-brown fluorescent metal-organic coordination supermolecular light conversion material, its preparation method and application in preparing orange-red LED

By preparing a reddish-brown fluorescent metal-organic coordination supramolecular light-converting material, the problem of high-purity orange-red LED devices was solved, achieving efficient light conversion and stability, and providing a rare-earth alternative.

CN117402365BActive Publication Date: 2026-07-24CHONGQING NORMAL UNIVERSITY
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202311335580.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-16
Publication Date
2026-07-24
Estimated Expiration
2043-10-16

AI Technical Summary

Technical Problem

Existing technologies make it difficult to fabricate orange-red LED devices with high color purity, and rare earth resources are non-renewable, so it is necessary to develop new alternative light conversion materials.

Method used

The red-brown fluorescent metal-organic coordination supramolecular light-converting material [Zn(Hntb)(tztp)]n was prepared by solvothermal synthesis to form a one-dimensional metal-organic coordination polymer chain and a three-dimensional supramolecular network, thereby achieving efficient light conversion.

Benefits of technology

The prepared light-converting material achieved high-purity orange-red light emission in LED devices, with a peak wavelength of 626.9 nm and a color purity of 99.7%. The material also exhibited good stability and a yield of 53.6%.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117402365B_ABST
    Figure CN117402365B_ABST
Patent Text Reader

Abstract

The application provides a red-brown fluorescent metal-organic coordination supermolecular light conversion material, which has a chemical general formula of [Zn(Hntb)(tztp)] n , belongs to a monoclinic system, a space group is P21 / c, and a unit cell parameter is 0.8 nm*0.8 nm*1.8 nm. 2‑ In the chemical general formula, the component Hntb is obtained by removing two protons from a rigid aromatic ternary carboxylic acid H3ntb, the structure of the H3ntb is shown as formula I, and the structure of the electron-rich component tztp is shown as formula II. The light conversion material prepared by the application is a crystalline supermolecular aggregate based on [Zn(Hntb)(tztp)] n coordination polymerization chain, and two three-leaf helix structure units in mirror image relationship exist in the crystal structure. The yield of the new material can reach 53.6%, the new material has good thermal stability, under ultraviolet light, the crystal sample is red-brown, and as a single-component non-rare earth light conversion agent, the light conversion layer prepared by the application can efficiently convert LED chip blue light into high-color-purity orange red light.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Orange-red fluorescent zinc coordination polymer with mixed ligands, preparation method of polymer and application of polymer

    CN109734732A

  • Red fluorescent zinc organic supramolecule, preparation method and application thereof

    CN109776813A