US 2021/0332289 A1 · DEEP-RED LIGHT THERMALLY ACTIVATED DELAYED FLUORESCENT MATERIAL AND SYNTHESIZING METHOD THEREOF, AND ELECTROLUMINESCENT DEVICE

Abstract

A deep-red light thermally activated delayed fluorescent material and a synthesizing method thereof, and an electroluminescent device are described. The deep-red light thermally activated delayed fluorescent material is a target compound reacted and synthesized by an electron donor and an electron acceptor. The target compound is a D-A molecular structure or a D-A-D molecular structure, wherein the electron acceptor is a planar electron acceptor with an ultra-low triplet state energy level, and a triplet state energy level of the target compound ranges from 1.0 to 2.0 eV. The synthesized deep-red light thermally activated delayed fluorescent material provides high electroluminescent performance, the synthesis efficiency thereof is improved, and the preparation of the highly efficient organic electroluminescent device is realized.

Claims10

Dependent claims

A deep-red light thermally activated delayed fluorescent material, which is a target compound reacted and synthesized by an electron donor and an electron acceptor, wherein the target compound is a D-A molecular structure or a D-A-D molecular structure, the D in the molecular structure is the electron donor, the A is the electron acceptor, the electron acceptor is a planar electron acceptor with an ultra-low triplet state energy level, and a triplet state energy level of the target compound ranges from 1.0 to 2.0 eV.

A synthesizing method of a deep-red light thermally activated delayed fluorescent material, comprising:

a reaction solution preparation step of placing an electron donor, an electron acceptor, and a catalyst into a reaction vessel to obtain a reaction solution;
a target compound synthesis step of placing the reaction solution at a temperature from 100° C. to 200° C. to thoroughly react and thus obtain a mixed solution, wherein the mixed solution has a target compound formed after reacting;
an extraction step of cooling the mixed solution to a room temperature to extract the target compound from the mixed solution;
and
a target compound purification treatment step of separating and purifying the target compound to obtain the deep-red light thermally activated delayed fluorescent material.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/462,138Filed 29 Dec 2018

Priority

CN 201811226550.X22 Oct 2018

Published

28 Oct 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

C07D 279/26
With hydrocarbon radicals, substituted by amino radicals, attached to the ring nitrogen atom: without other substituents attached to the ring system
C07D 219/06
With hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals,…:…
C07D 265/38
Condensed with carbocyclic rings: [b, e]-condensed with two six-membered rings
C09K 11/06
Luminescent materials, e.g. electroluminescent or chemiluminescent: containing organic luminescent materials

Deep-red light thermally activated delayed fluorescent material and synthesizing method thereof, and electroluminescent device

Life of this patent

Deep-red light thermally activated delayed fluorescent material and synthesizing method thereof, and electroluminescent device

Life of this patent

Abstract

Claims10