# US 2020/0399533 A1 · Electroluminesecent material, method for manufacturing same, and light emitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399533 A1 - Document ID: US20200399533A1 - Status: Published application - Kind: A1 - Application number: 16/611,299 - Filed: 2019-09-11 - Published: 2020-12-24 - Earliest claimed: 2019-06-24 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Yanjie WANG - Web page: https://patentgrep.com/patent/US20200399533A1 ## CPC - C09K 11/06: containing organic luminescent materials - H10K 85/631: {Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine} - H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole} - C09K 2211/1466: containing nitrogen as the only heteroatom - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 50/15: Hole transporting layers - H10K 50/16: Electron transporting layers - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present application provides an electroluminescent material, a method for manufacturing the electroluminescent material, and a light emitting device, the asymmetric monocyanopyrazine of the pyrene nucleus of the electroluminescent material is used as an acceptor, and the pyrene nucleus has a large plane and rigid P-type delayed fluorescence characteristic, which can combine triplet excitons via triplet excitons-triplet excitons to enhance utilization of excitons, thereby to achieve an electroluminescent material, a method for manufacturing the electroluminescent material, and a light emitting device, to realize an electroluminescent material and a light emitting device with a high quantum efficiency. ## Claims ### Claim 1 An electroluminescent material, wherein a structural formula of the electroluminescent material is R2-R1-R2, wherein a structural formula of the R1 group comprises one selected from the group consisting of and a structural formula of the R2 group comprises one selected from the group consisting of ### Claim 2 (depends on 1) The electroluminescent material of claim 1, wherein the structural formula of the electroluminescent material is and a peak value of the electroluminescent material ranges from 710 nm to 730 nm. ### Claim 3 (depends on 1) The electroluminescent material of claim 1, wherein the structural formula of the electroluminescent material is and a peak value of the electroluminescent material ranges from 750 nm to 770 nm. ### Claim 4 A method for manufacturing an electroluminescent material, comprising: providing a first reactant and a second reactant, and reacting the first reactant and the second reactant to generate a first intermediate product, wherein the first reactant is a compound containing a R3 group, a structural formula of the R3 group is one selected from the group consisting of a structural formula of the second reactant is the first intermediate product is a compound containing a R1 group, a structural formula of the R1 group is one selected from the group consisting of and providing a third reactant, and reacting the first intermediate product and the third reactant to generate the electroluminescent material, wherein the third reactant comprises a compound containing a R2 group, and a structural formula of the R2 group is ### Claim 5 (depends on 4) The method for manufacturing the electroluminescent material of claim 4, wherein a structural formula of the first reactant is Br—R3—Br, a structural formula of the first intermediate product is Br—R1—Br. ### Claim 6 (depends on 4) The method for manufacturing the electroluminescent material of claim 4, wherein in the step of reacting the first reactant and the second reactant to generate the first intermediate product, a relationship between a molar quantity of the first reactant and a molar quantity of the second reactant is that for 10 millimoles of the first reactant, there are 5 millimoles-20 millimoles of the second reactant. ### Claim 7 (depends on 4) The method for manufacturing the electroluminescent material of claim 4, wherein the first reactant and the second reactant are reacted in a first solvent to generate the first intermediate product, and the first solvent comprises acetic acid, formic acid, formaldehyde, hydroxypropionic acid, thioglycolic acid, indole-3-acetic acid, methyl formate, 2-hydroxyacetaldehyde, ethyl formate, methyl acetate, peroxypropionic acid, peracetic acid, or combinations thereof. ### Claim 8 (depends on 4) The method for manufacturing the electroluminescent material of claim 4, wherein the third reactant is R2—X, wherein the X group is a boronic acid group or a boronic acid pinacol ester group. ### Claim 9 (depends on 4) The method for manufacturing the electroluminescent material of claim 4, wherein in the step of reacting the first intermediate product and the third reactant to generate the electroluminescent material, a relationship between a molar quantity of the first intermediate product and a molar quantity of the third reactant is that for 5 millimoles of the first intermediate product, there are 8 millimoles-15 millimoles of the third reactant. ### Claim 10 (depends on 4) The method for manufacturing the electroluminescent material of claim 4, wherein the first intermediate product and the third reactant are reacted in a second solvent to generate the electroluminescent material, and the second solvent comprises tetrahydrofuran, formaldehyde, ether, vinyl ether, diisopropyl ether, perchloroethylene, trichloroethylene, acetone, ethylene glycol ether, triethanolamine, or combinations thereof. ### Claim 11 (depends on 10) The method for manufacturing the electroluminescent material of claim 10, wherein the second solvent contains an additive, the additive comprises sodium carbonate, potassium carbonate, potassium carbonate aqueous solution, tetrakis(triphenylphosphine)palladium, n-butyllithium, potassium hydroxide, sodium hydroxide and sodium t-butoxide, or combinations thereof. ### Claim 12 (depends on 11) The method for manufacturing the electroluminescent material of claim 11, wherein the second solvent is tetrahydrofuran, the additive is aqueous solution of sodium carbonate and tetrakis(triphenylphosphine)palladium. ### Claim 13 (depends on 4) The method for manufacturing the electroluminescent material of claim 4, wherein a structural formula of the electroluminescent material is R2-R1-R2. ### Claim 14 A light emitting device comprising: a substrate layer, wherein the substrate layer comprises a base and an anode layer, the anode layer is formed on the base; a hole injection layer, wherein the hole injection layer is formed on the anode layer; a hole transport layer, wherein the hole transport layer is formed on the hole injection layer; a light emitting layer, wherein the light emitting layer is formed on the hole transport layer; an electron transport layer, wherein the electron transport layer is formed on the light emitting layer; and a cathode layer, wherein the cathode layer is formed on the electron transport layer; wherein the light emitting layer comprises the electroluminescent material, wherein a structural formula of the electroluminescent material is R2-R1-R2, wherein a structural formula of R1 group comprises one selected from the group consisting of and a structural formula of R2 group comprises one selected from the group consisting of ### Claim 15 (depends on 14) The light emitting device of claim 14, wherein the structural formula of the electroluminescent material is and a peak value of the electroluminescent material ranges from 710 nm to 730 nm. ### Claim 16 (depends on 14) The light emitting device of claim 14, wherein the structural formula of the electroluminescent material is and a peak value of the electroluminescent material ranges from 750 nm to 770 nm. ### Claim 17 (depends on 14) The light emitting device of claim 14, wherein a thickness of the light emitting layer ranges from 20 nm to 60 nm.