Double color core based tri-phosphor white light hyperbranched conjugated polymer and applications thereof

A hyperbranched conjugated, polymer technology, used in luminescent materials, chemical instruments and methods, sustainable architecture, etc., can solve problems such as small steric hindrance, unfavorable device application, and inability to effectively suppress the quenching of phosphorescent Ir concentration.

Active Publication Date: 2016-03-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small steric hindrance of linear white-light conjugated polymers, they cannot effectively suppress the concentration quenching and triplet (T-T) quenching of phosphorescent Ir(Ш) complexes, resulting in current rolling in electroluminescent devices. The drop is obvious, which is extremely unfavorable for the application of the device

Method used

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  • Double color core based tri-phosphor white light hyperbranched conjugated polymer and applications thereof
  • Double color core based tri-phosphor white light hyperbranched conjugated polymer and applications thereof
  • Double color core based tri-phosphor white light hyperbranched conjugated polymer and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Embodiment 1: PF-Ir(ppy) 2 (pytzph)50-Ir(piq) 2 Preparation of (pytzph)50 (50 represents green phosphorescent Ir(ppy) 2 (pytzph) complexes and red phosphorescent Ir(piq) 2 (pytzph) complex mole percentage in the whole polymer were 0.05mol%).

[0078] Under the protection of nitrogen, the reaction monomer 2,7-bis(4,4,5,5-tetramethyl-1,3-dioxo-2-boryl)-9,9-dioctylfluorene 642.6mg (1mmol), 2,7-dibromo-9,9-dioctylfluorene 546.8mg (0.997mmol), Ir(ppyBr) 2 (pytzphBr)0.95591mg (0.001mmol), Ir(piqBr) 2 (pytzphBr) 1.05864mg (0.001mmol) was added to 13.34mL toluene and stirred for 30min to fully mix, and then Pd(PPh 3 ) 4 46.4mg (0.04mmol), Aliquat3362 drops, 2mol / LK 2 CO 3 Add 6mL of the solution into the mixed solution, stir and raise the temperature to reflux temperature of 94°C and react for 48h, then add 20mg of end-capping material phenylboronic acid, react for 12h, then add end-capping material bromobenzene 0.3mL, and continue the reaction for 12h. After the react...

Embodiment 2

[0083] Embodiment 2: PF-Ir(ppy) 2 (pytzph)250-Ir(piq) 2 Preparation of (pytzph)50 (250 and 50 represent green phosphorescent Ir(ppy) respectively 2 (pytzph) complexes and red phosphorescent Ir(piq) 2 (pytzph) complex mole percent in the whole polymer is 0.25mol% and 0.05mol%).

[0084] Under the protection of nitrogen, the reaction monomer 2,7-bis(4,4,5,5-tetramethyl-1,3-dioxo-2-boryl)-9,9-dioctylfluorene 642.6mg (1mmol), 2,7-dibromo-9,9-dioctylfluorene 543.5mg (0.991mmol), Ir(ppyBr) 2 (pytzphBr) 4.77955 mg (0.005 mmol), Ir (piqBr) 2 (pytzphBr) 1.05864mg (0.001mmol) was added to 13.34mL toluene and stirred for 30min to fully mix, and then Pd(PPh 3 ) 4 46.4mg (0.04mmol), Aliquat3362 drops, 2mol / LK 2 CO 3 6 mL of the solution was added to the mixed solution, stirred and heated to reflux temperature of 94° C. for 48 h. Then add 20 mg of end-capping material phenylboronic acid to react for 12 hours, then add end-capping material bromobenzene 0.3 mL to continue reaction fo...

Embodiment 3

[0087] Embodiment 3: PF-Ir(ppy) 2 (pytzph)140-Ir(piq) 2 Preparation of (pytzph)70 (140 and 70 represent green phosphorescent Ir(ppy) respectively 2 (pytzph) complexes and red phosphorescent Ir(piq) 2 (pytzph) complex mole percent in the whole polymer is 0.14mol% and 0.07mol%)

[0088]Under the protection of nitrogen, the reaction monomer 2,7-bis(4,4,5,5-tetramethyl-1,3-dioxo-2-boryl)-9,9-dioctylfluorene 642.6mg (1mmol), 2,7-dibromo-9,9-dioctylfluorene 544.9mg (0.99357mmol), Ir(ppyBr) 2 (pytzphBr)2.73117mg (0.0028571mmol), Ir(piqBr) 2 (pytzphBr) 1.51234mg (0.0014286mmol) was added to 13.34mL toluene and stirred for 30min to fully mix, and then Pd(PPh 3 ) 4 46.4mg (0.04mmol), Aliquat3362 drops, 2mol / LK 2 CO 3 6 mL of the solution was added to the mixed solution, stirred and heated to reflux temperature of 94° C. for 48 h. Then add 20 mg of end-capping material phenylboronic acid to react for 12 hours, then add end-capping material bromobenzene 0.3 mL to continue reactio...

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Abstract

The invention discloses a double color core containing white light hyperbranched conjugated polymer prepared based on a red, green and blue tri-phosphor principle. Green and red phosphorescence Ir (III) complexes are taken as cores of a hyperbranched structure, and a polyfluorene derivative blue fluorescent material is taken as a skeleton of the hyperbranched structure, and through regulating the contents of the green and red phosphorescence Ir (III) complexes, a hyperbranched conjugated polymer which can achieve white light emission is obtained. The electroluminescent spectrum of the conjugated polymer disclosed by the invention has high color saturation, and is close to that of pure white light emission; and the conjugated polymer has good electroluminescent properties, and can be used as a light-emitting material for preparing white-light organic electroluminescent devices with single light-emitting layers.

Description

technical field [0001] The invention belongs to the field of optoelectronic material application technology, and relates to a white light conjugated polymer with a hyperbranched structure, in particular to a white light hyperbranched conjugated polymer with a two-color core. The polymer is composed of red, green and blue The three light-emitting units are connected by conjugated chemical bonds, and high-quality white light electroluminescence spectrum can be obtained. Background technique [0002] In recent years, polymer organic electroluminescent materials have attracted extensive attention. This type of polymer material has the advantages of simple synthesis process and low cost, and a single polymer light-emitting layer can effectively inhibit phase separation, thereby improving the electroluminescent performance of the device, and has shown great advantages in spin coating and inkjet printing. , can be used to prepare large-area flat-panel displays, and become the main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08G61/02C08G61/12C09K11/06H01L51/54
CPCC09K11/06C08G61/02C08G61/124C08G83/005C08G2261/5222C08G2261/3142C08G2261/3241C08G2261/18C08G2261/17C08G2261/132C09K2211/185H10K85/761Y02B20/00
Inventor 王华孙静张跳梅许慧侠武钰铃陈伟华许并社
Owner TAIYUAN UNIV OF TECH
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