Electronic-transmission luminescent material and application thereof

A luminescent material, electron transport technology, applied in luminescent materials, circuits, electrical components, etc., can solve the problem that it is difficult to meet the requirements of high efficiency and high color purity of blue light materials, achieve good electron transport performance, avoid aggregation and mutual effect, improve efficiency

Active Publication Date: 2016-05-25
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wide energy gap of blue light materials, it is difficult to meet the requirements of high efficiency and high color purity of blue light materials

Method used

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  • Electronic-transmission luminescent material and application thereof
  • Electronic-transmission luminescent material and application thereof
  • Electronic-transmission luminescent material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 Preparation of electronic and luminescent material C01

[0034]

[0035] Under the protection of nitrogen, put in 2,2'-diboronate spirofluorene (1.137g, 2mmol), 4'-bromo-2,2':6',2"-tribromopyridine (1.374g, 4.4mmol ), an aqueous solution of potassium carbonate (80mL, 0.1mol / L), toluene (200mL), and finally the catalyst Pd (PPh 3 ) 4 (300mg, 0.26mmol), the system was heated to 90-100°C and kept for reaction for 36 hours. Add 50 mL of deionized water to stop the reaction. Collect the organic phase, get the crude product after dehydration, silica gel column chromatography, eluting agent uses V 乙酸乙酯 :V 正己烷 =1:20 purification and separation, a white solid was obtained, which was the crude product of the target compound C01.

[0036] The crude product was further sublimated and purified using a chemical vapor deposition system at a sublimation temperature of 320° C. to obtain compound C01 with a yield of 82%.

[0037] High resolution mass spectrometry, E...

Embodiment 2

[0039] Example 2 Preparation of electronic and luminescent material C21

[0040]

[0041] Under the protection of nitrogen, put in 2,7-diboronate spirofluorene (1.257g, 2.2mmol), 4'-bromo-2,2':6',2"-tribromopyridine (1.520g, 4.8mmol ), an aqueous solution of potassium carbonate (88mL, 0.1mol / L), toluene (200mL), and finally the catalyst Pd (PPh 3 ) 4 (300mg, 0.26mmol), the system was heated to 90-100°C and kept for reaction for 36 hours. Add 50 mL of deionized water to stop the reaction. Collect the organic phase, get the crude product after dehydration, silica gel column chromatography, eluting agent uses V 1,2-二氯乙烷 :V 正己烷 =1:25 Purification and separation to obtain a white solid, which is the crude product of the target compound C21.

[0042] The crude product was further purified by sublimation using a chemical vapor deposition system at a sublimation temperature of 315°C to obtain compound C21 with a yield of 86%.

[0043] High resolution mass spectrometry, ESI so...

Embodiment 3

[0047] Example 3 Application of Light Emitting and Electron Transport Material C01 in Organic Electroluminescent Devices

[0048] This embodiment prepares organic electroluminescence device according to the following method:

[0049] a) Clean ITO (indium tin oxide) conductive glass: use deionized water, acetone, and absolute ethanol to ultrasonically clean the ITO glass for 15 minutes each, and then treat it in a plasma cleaner for 2 minutes;

[0050] b) Vacuum evaporation or solution film-forming hole transport layer NPB on the anode ITO glass, with a thickness of 50nm;

[0051] c) On the hole transport layer NPB, a luminescent and electron transport layer C01 is vacuum evaporated, with a thickness of 60nm;

[0052] d) On top of C01, an electron injection layer LiF is vacuum-evaporated with a thickness of 1 nm;

[0053] e) On the electron injection layer LiF, a cathode Al is vacuum-evaporated to a thickness of 100 nm.

[0054] The optoelectronic data of device 1, such as t...

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Abstract

The invention relates to an electronic-transmission luminescent material and application thereof. The electronic-transmission luminescent material uses spirofluorene as a parent nucleus which is connected with one or two terpyridyl groups. The spirofluorene is an important blue-fluorescence parent nucleus, the molecule is a twisted non-coplanar structure, the intramolecular conjugation degree is reduced, and the introduction of the blue shift of the luminescence wavelength effectively enhances the color purity of the device. The twisted structure can avoid molecular cohesion and enhance the luminescence efficiency. The rigid structure of the spirofluorene greatly enhances the heat stability of the molecules. Pyridine is an electron-deficient molecular structure, and is a compound which is widely used as an electronic transmission layer in OLEDs (organic light-emitting diodes). The material has the advantages in the spirofluorene and pyridine, and can be used as a blue luminescent material, electronic transmission material and or electronic transmission and luminescent material.

Description

technical field [0001] The invention relates to an electron transport type luminescent material and its application, belonging to the technical field of organic photoelectric materials. Background technique [0002] In recent years, organic light emitting diode (OLED) is a very popular emerging technology in the 21st century. Due to its own advantages, such as self-illumination, large viewing angle, low driving voltage, high luminance, ultra-thin, flexible display, etc., it is expected to become the next-generation mainstream display to replace liquid crystal. Due to the investment and efforts of all walks of life, OLED has achieved great development. Now many research institutions and companies around the world have invested a lot of energy in the research and development of organic electroluminescent devices, but there are still many key issues that have not been truly resolved, such as the color purity of blue light, the short life of light-emitting devices, and low effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/22C07D213/127C09K11/06H01L51/54
CPCC09K11/06C07D213/127C07D213/22C09K2211/1011C09K2211/1029H10K85/624H10K85/654
Inventor 王元勋盛磊雷桂平肖立新陈志坚龚旗煌
Owner VALIANT CO LTD
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