Near-white organic electroluminescent material and its prepring method

An electroluminescent material and electroluminescent technology, applied in the directions of luminescent materials, electroluminescent light sources, electric light sources, etc., can solve the problems of difficulty of white light-emitting devices, shift of light-emitting wavelength, etc., achieve good carrier transport characteristics, and enhance luminescence. Good strength and uniformity

Inactive Publication Date: 2007-03-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the current research, most of the white light-emitting devices are prepared by doping, and the slight change of the doping concentration will lead to the shift of the emission wavelength, which brings difficulties to the production of white light-emitting devices with stable performance.

Method used

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  • Near-white organic electroluminescent material and its prepring method
  • Near-white organic electroluminescent material and its prepring method
  • Near-white organic electroluminescent material and its prepring method

Examples

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Effect test

Embodiment 1

[0023] Embodiment 1, the preparation of 4-(benzothiazole)-N-(4-(benzothiazole) phenyl)-N-phenylaniline: add 1.2g (4.0mmol) 4-dianilinobenzene in 50ml flask Formaldehyde, 0.9ml (8.4mmol) o-aminothiophenol and 10ml DMSO, placed the reaction bottle in a sand bath, heated to 195°C and refluxed for 2 hours. The reaction solution was cooled to room temperature, poured into water, and filtered with suction to obtain a light brown solid. Purified by column chromatography (eluent: toluene) to obtain 1.7 g of a yellow-white solid (83% yield).

[0024] IR (KBr, cm -1 ): 2364, 1591, 1560, 1510, 1457, 835, 760, 725, 695.

[0025] 1 H-NMR (CDCl 3 , 500MHz): 8.04(d, J=8.4 Hz, 2H), 7.99(d, J=8.8 Hz, 4H), 7.89(d, J=8.0 Hz, 2H), 7.48(t, J=7.9 Hz, 2H ), 7.38-7.35 (m, 4H), 7.23-7.17 (m, 7H).

[0026] Solid photoluminescence (thin film): peak wavelength 468nm, half maximum width 136nm.

[0027] Color coordinates: x=0.20, y=0.33.

[0028] MS (MALDI): m / e 511 (M).

[0029] Elemental Analysi...

Embodiment

[0030] Embodiment, preparation of near-white organic electroluminescence device: ITO conductive glass is put into 1.0X10 after cleaning -5 In a vacuum chamber of Pa, vapor-deposit 60nmNPB, 40nmBDS and 30nmTPBI in sequence, and then in another vacuum chamber (1.0X10 -4 pa) Evaporate 100nmAl to obtain a device with a structure of ITO / NPB / BDS / TPBI / Al. The device is not packaged and measured in a nitrogen atmosphere. The light-up voltage is 6.0V (1cd / m 2 ), the maximum brightness is 3610cd / m 2 , the maximum current efficiency is 5.50cd / A, the maximum power efficiency is 1.66lm / W, and the maximum external quantum efficiency is 3.03%.

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Abstract

The invention relates to organic electroluminescence luminous close white luminescent material and the preparing method. The material has basic structure of the tri-aromatic amine which has extensibility in three-dimensional space to reduce agglomeration among molecule and luminescent material self quenching, many different chromophoric group-benzothiazole which can increase luminous intensity for molecule which has better electron transmission characteristic, can produce formless film with high thermal stability and good uniformity. Thus the material can be used to make close white organic electroluminescence device or panchromatic one with other materials. It has wide application prospect in other optoelectronic device.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence materials, in particular to a near-white light-emitting material for organic electroluminescence and a preparation method thereof. technical background [0002] Organic electroluminescence has the characteristics of low-voltage DC drive, simple structure, high brightness, wide viewing angle, and rollability, and is considered to be one of the most promising flat-panel display technologies for the next generation (C.W.Tang and S.A.VanSlyke.Appl.Phys.Lett. , 1987, 51(12):913-915). The research and development of a wide variety of organic light-emitting compounds and metal light-emitting complexes provides a prerequisite for obtaining high-brightness, high-efficiency, full-color, and high-stability light-emitting devices. Fluorescent dyes with good photoluminescence efficiency are widely used in the preparation of organic electroluminescence, which greatly promotes the developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H05B33/14
Inventor 付慧英肖斐孙晓宇
Owner FUDAN UNIV
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