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Fluorescence-phosphorescence hybridized organic electroluminescent white light polymer and preparation method thereof

A polymer and white light technology, applied in chemical instruments and methods, circuits, luminescent materials, etc., can solve the problems of poor stability of blue phosphorescent dyes, affecting device chromaticity stability, and reducing device efficiency, etc., to achieve luminescent performance Excellent, avoids interface deterioration, and improves solubility

Active Publication Date: 2014-11-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic electroluminescent devices are a type of device that has been studied more. Its technology is also the most mature and some products have been industrialized, but its luminous efficiency is low; organic electrophosphorescent devices have attracted much attention because of their very high efficiency, but phosphorescent devices There are also several defects, such as when the current density increases, the annihilation between the triplet-triplet excitons is serious, so that the efficiency of the device is rapidly reduced, and because the stability of the blue phosphorescent dye is not good, when the white light device is prepared, it affects the entire Device Chromaticity Stability

Method used

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  • Fluorescence-phosphorescence hybridized organic electroluminescent white light polymer and preparation method thereof
  • Fluorescence-phosphorescence hybridized organic electroluminescent white light polymer and preparation method thereof
  • Fluorescence-phosphorescence hybridized organic electroluminescent white light polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: The synthesis center core spirobifluorene accounts for 10% of the total molar weight of the polymer, and the red light group Ir(piq) 2 Acac accounted for 0.02% of the total polymer molar fluorescent phosphorescence hybrid organic electroluminescent polymer.

[0036] 1) Synthesis of spiro[3.3]heptane-2,6-bis-(2’,2”,7’,7”-tetrabromospirofluorene) (M3)

[0037]

[0038]Add 3.26g (10mmol) of 2,7-dibromofluorene into a 250ml three-necked flask, vacuum three times with nitrogen, fully exhaust the air in the flask, add 50ml THF, stir and mix at room temperature for 30min, and mix 0.6g (25mmol) NaH was added to the flask five times, with an interval of 15 minutes between each dosing, vacuum pumping and nitrogen gas were carried out again, 1.70 g (4 mmol) of pentaerythritol bromide was dissolved in 20 ml of THF, and slowly dropped through a normal pressure separatory funnel within 30 min. into a three-necked flask to allow it to participate in the reaction. The i...

Embodiment 2

[0051] The synthetic central core spirobifluorene accounts for 10% of the total molar weight of the polymer, and the red light group Ir(piq) 2 Hyperbranched white photopolymer organic electroluminescent material with total molar weight of acac accounting for 0.025% of the polymer

[0052] Take 0.19g (0.35mmol) of 2,7-dibromo-9,9-dioctylfluorene (M1) and 0.35g of 9,9-dioctylfluorene-2,7-diboronic acid inanol ester (M2) (0.55mmol), central core spiro[3.3]heptane-2,6-bis-(2',2",7',7"-tetrabromospirofluorene) (M3) 0.07g (0.1mmol) was added to three ports In the flask, vacuumize and fill with nitrogen three times each, stir at room temperature, add 30ml of dehydrated toluene, 15ml of 2mol / L sodium carbonate solution, vacuumize and fill with nitrogen, take 1ml of Aliquant336 dissolved in 5ml of dehydrated toluene and add it to the three-necked flask in the reaction 0.1 g of tetrakis(triphenylphosphine)palladium was added, and the solution became golden yellow. Vacuumize and fill w...

Embodiment 3

[0055] The synthetic central core spirobifluorene accounts for 10% of the total molar weight of the polymer, and the red light group Ir(piq) 2 Hyperbranched white photopolymer organic electroluminescent material with the total molar weight of acac accounting for 0.03% of the polymer

[0056] Take 0.19g (0.35mmol) of 2,7-dibromo-9,9-dioctylfluorene (M1) and 0.35g of 9,9-dioctylfluorene-2,7-diboronic acid inanol ester (M2) (0.55mmol), central core spiro[3.3]heptane-2,6-bis-(2',2",7',7"-tetrabromospirofluorene) (M3) 0.07g (0.1mmol) was added to three ports In the flask, vacuumize and fill with nitrogen three times each, stir at room temperature, add 30ml of dehydrated toluene, 15ml of 2mol / L sodium carbonate solution, vacuumize and fill with nitrogen, take 1ml of Aliquant336 dissolved in 5ml of dehydrated toluene and add it to the three-necked flask in the reaction 0.1 g of tetrakis(triphenylphosphine)palladium was added, and the solution became golden yellow. Vacuumize and fil...

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Abstract

The invention discloses a three-dimension structure-based fluorescence-phosphorescence hybridized organic electroluminescent white light polymer which is a polymer obtained by combining a spirobifluorene core group part, an Ir(piq)2acac red light group part and a 9,9-dioctylfluorene part which is connected between the spirobifluorene core group part and the Ir(piq)2acac red light group part, the fluorescence-phosphorescence hybridized organic electroluminescent white light polymer has the structural general formula as shown in the specification. The fluorescence-phosphorescence hybridized organic electroluminescent white light polymer is green solid powder, is freely soluble into common organic solvents, is excellent in thermal stability, an organic electroluminescent light-emitting device produced by the fluorescence-phosphorescence hybridized organic electroluminescent white light polymer used as a light-emitting layer material can be electroluminescent to emit white light, the electroluminescent light-emitting spectrum range is relatively wide, and the light-emitting efficiency of the device is high.

Description

technical field [0001] The invention relates to an organic electroluminescent material, in particular to a fluorescent phosphorescent hybrid organic electroluminescent polymer capable of emitting white light based on a three-dimensional structure, and a preparation method of the organic electroluminescent material. Background technique [0002] Organic electroluminescence devices based on small organic molecules / polymers (WOLED / WPLED) overcome the shortcomings of inorganic semiconductor materials and organic small molecule materials, and have low energy consumption, high efficiency, wide viewing angle, rich colors, fast response, green environmental protection and The ability to prepare flexible screens and many other excellent properties makes the research on polymer luminescent materials and devices very active, and is recognized by the industry as the next-generation solid-state lighting technology with the most potential and development prospects in the 21st century. [...

Claims

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Application Information

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IPC IPC(8): C08G61/12C09K11/06H01L51/54
CPCY02B20/00
Inventor 王华武钰铃李洁梁文青杨君礼苗艳勤孙静许并社
Owner TAIYUAN UNIV OF TECH
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