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Autonomous three dimensional polymer TADF luminescent material as well as preparation method and application thereof

A technology of bulk polymers and luminescent materials, applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve the problems of difficult to obtain high molecular weight target products, difficult to control the content of functional components, phase separation, etc. Achieve good application prospects, excellent device performance, and avoid concentration quenching effects

Inactive Publication Date: 2020-01-21
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach will inevitably bring about the problem of phase separation, so it is necessary to develop some new self-hosted polymer TADF materials to prepare non-doped OLED devices
[0007] (2) The current reports on autonomous dendrimer TADF materials have certain requirements for the symmetry of the TADF core molecule and the number of modifiable sites, and the content of different functional components is not easy to control
[0008] (3) For the synthesis of TADF light-emitting polymers with complex structures, it is often difficult to obtain high molecular weight target products under harsh conditions (higher than 100 ° C, continuous reaction for 3-4 days)

Method used

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  • Autonomous three dimensional polymer TADF luminescent material as well as preparation method and application thereof
  • Autonomous three dimensional polymer TADF luminescent material as well as preparation method and application thereof
  • Autonomous three dimensional polymer TADF luminescent material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Self-hosted TADF light-emitting polymer PCz-mCP-PxzTrz-X (X=0,10,20,30 or 40, wherein X is the percentage of PxzTrz-Alk in two alkyne-containing functional compounds), the following steps are adopted be made of:

[0066] 1. Polymer skeleton (PCz-N 3 )Synthesis

[0067] 1) Monomer Cz-N 3 Synthesis

[0068]

[0069] Weigh 3,6-dibromocarbazole (CzBr 2 , 3.250g, 10mmol) was placed in a 50mL round bottom flask, DMF (20mL) was added and stirred until it was completely dissolved. Weigh KOH (1.122g, 20mmol) into the flask, heat up to 80°C and stir for 20min. 1,6-dibromohexane (9.759 g, 40 mmol) was added dropwise to the reaction liquid, and reacted at 80° C. for 8 h. After the reaction stopped, cool to room temperature, add chloroform to the reaction flask to dilute, transfer to a separatory funnel, wash with saturated saline for several times, collect the organic phase, add anhydrous MgSO 4 Let dry overnight. After filtration and vacuum concentration to remove the s...

Embodiment 2

[0123] Self-contained TADF light-emitting polymer PTPA-mCP-PxzTrz-X (X=0,10,20,30,40 where X is the percentage of PxzTrz-Alk in the two alkyne-containing functional compounds), prepared by the following steps have to:

[0124] 1. Polymer skeleton (PTPA-N 3 )Synthesis

[0125] 1) Monomer Cz-N 3 The synthesis is the same as in Example 1

[0126] 2) Synthesis of monomer TPA-BO

[0127]

[0128] Synthesis of I-PhR

[0129] Weigh 4-iodophenol (1.980g, 9mmol) into a flask containing DMF (20mL), then add KOH (729mg, 13mmol) and bromoisoctane (1.738g, 9mmol) in turn, heat to 100°C and stir 24h. After the reaction, the reaction solution was poured into 100 mL of ice water, extracted with chloroform, and the collected organic phase was passed through anhydrous MgSO 4 After drying, filtration and concentration, the crude product was further purified by silica gel column chromatography (n-hexane) to obtain a colorless liquid compound I-PhR (1.960 g, 65%). 1 H NMR (400MHz, CDCl ...

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Abstract

The invention relates to an autonomous three dimensional polymer thermal activation delayed fluorescence (TADF) material and a preparation method thereof. The autonomous three dimensional polymer TADFluminescent material has a polymer framework based on 3,6-carbazole (PCz-N3) and a skeleton based on a carbazole-triphenylamine alternating copolymer (PTPA-N3); through a click reaction of azide-alkynyl, a TADF light-emitting unit triphenyltriazine-phenoxazine (PxzTrz) and a main body unit 1,3-di-9-carbazolyl benzene (mCP) are grafted to a main chain of the polycarbazole / triphenylamine to complete post-functionalization. The polymer has the advantages of high molecular weight, favorable film-forming property, favorable solubility and favorable thermal stability, and can be used as a luminescent layer material to be applied to organic electroluminescent devices to obtain devices with excellent properties.

Description

technical field [0001] The invention relates to the field of organic light-emitting materials, in particular to a series of solution-processable autonomous polymer TADF light-emitting materials, a synthesis method thereof and an application as an organic light-emitting material. Background technique [0002] The first-generation luminescent materials based on fluorescent emitters only use singlet excitons to emit light, and the internal quantum efficiency (Internal Quantum Efficiency, IQE) limit is 25%, which limits the further improvement of its efficiency. In 1998, Professor Forrest of the United States and Professor Ma Yuguang of my country respectively reported the second-generation phosphorescent materials based on osmium and platinum complexes, which increased the internal quantum efficiency of OLEDs from the traditional theoretical limit of 25% to 100%, and opened up the field of phosphorescent OLEDs. Emerging fields of research. In 2011, Professor Adachi and others p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12C09K11/06H01L51/50
CPCC08G61/124C09K11/06C08G2261/124C08G2261/143C08G2261/1424C08G2261/3241C08G2261/3162C08G2261/52C09K2211/1466C09K2211/1416C09K2211/1475H10K50/11
Inventor 徐慎刚陈松松刘应良曹少魁宗万胜袁鹏
Owner ZHENGZHOU UNIV
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