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Quinoline zinc luminescent material and electroluminescent devices including the same

A technology of electroluminescent devices and luminescent materials, applied in luminescent materials, electric solid devices, electrical components, etc., can solve the problems of affecting the light emission of guest dyes, poor stability of luminescent color to voltage, complex preparation process, etc.

Inactive Publication Date: 2009-07-01
EAST CHINA NORMAL UNIV
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Problems solved by technology

[0005] But above-mentioned method has the deficiency that needs to improve urgently
For example, the disadvantages of the stacking method of blue, green, and red three primary colors of light-emitting layers are that the preparation process is complicated, the cost is high, and the stability of the light-emitting color to voltage is poor. rate; and the disadvantage of the dye doping method is to achieve
The disadvantage of the dye doping method is that it is difficult to achieve high energy transfer efficiency between the host luminescent material and the guest dye material, which affects the luminescence of the guest dye. In addition, the dye concentration and applied voltage have a great influence on the luminous color and efficiency. If the concentration is not well controlled, it will cause problems such as poor luminous chromaticity and low efficiency
The disadvantage of the recombination method is that it can be combined with other methods to achieve white light emission, and it is impossible to obtain white light organic electroluminescent devices only through exciplexes or adding a hole blocking layer.
[0006] Therefore, there is a lack of a white light organic electroluminescent device in the field, which can overcome the previous complex process of preparing three primary color light-emitting layers, uneven light emission, high cost, etc., and can overcome the doping of fluorescent dyes and host light-emitting materials method, the doping concentration is not easy to control, and the luminous chromaticity is not pure, etc.
[0007] Therefore, there is an urgent need in this field to develop a white light organic electroluminescent device device, which can overcome the previous complex process of preparing three-color light-emitting layer stacking, uneven light emission, and high cost. The material doping method, the doping concentration is not easy to control, and the luminous chromaticity is impure; at the same time, it needs to have the advantages of simple structure, good repeatability, and stable luminous performance of the device, which is conducive to large-scale industrial production

Method used

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  • Quinoline zinc luminescent material and electroluminescent devices including the same
  • Quinoline zinc luminescent material and electroluminescent devices including the same
  • Quinoline zinc luminescent material and electroluminescent devices including the same

Examples

Experimental program
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preparation example Construction

[0104] The preparation method of the composite luminescent material is not particularly limited, as long as the yellow luminescent material layer, the optional hole blocking layer, and the blue luminescent material layer each form a layered structure. The preparation method includes vapor deposition method, spin coating method and the like.

[0105] In the vapor deposition method, the composite luminescent material is obtained by a method comprising the following steps: respectively adopting a vacuum thermal evaporation method to sequentially vapor-deposit to form a yellow luminescent material layer, and optionally the hole blocking layer , and the blue luminescent material layer, thereby obtaining the composite material;

[0106] Preferably, during the evaporation film formation process, the vacuum degree is not lower than 2×10 -3 Pa, the evaporation current is 10.0-12.5A, and the specific evaporation rate is controlled between 0.2-0.3nm / s.

[0107] In the spin-coating meth...

Embodiment 1

[0142] Experimental Methods and Test Methods

[0143] Experimental method and test method of the present invention are as follows:

[0144] The vacuum thermal evaporation film forming method involved in the present invention adopts the DM-220 high vacuum multi-stage coating machine of Shanghai Tianjing Electronic Optical Technology Co., Ltd.

[0145] The measurement of the vacuum degree adopts the ZDF-2F compound vacuum gauge of Shanghai Jinma Electro-optical Technology Research Institute.

[0146] The thickness of the film is monitored by the LHC-2 film thickness monitor of Shanghai Jinma Electro-optical Technology Research Institute.

[0147] Organic luminescent material Zn(Q-4-biPh) 2 The characterization and the electroluminescent performance of the white light organic electroluminescent device device are tested as follows by the following method:

[0148] 1. Structural characterization

[0149] use 1 H NMR, MS and UV-Vis for ligand HQ-4-biPh and organic light-emittin...

Embodiment 2

[0172] Example 2 uses the same method as Example 1, except that 2-bromobiphenyl is used as a raw material to prepare the organolithium reagent.

[0173] The experimental results are as follows:

[0174] The 2-o-biphenyl-8-hydroxyquinoline (HQ-2-biPh) productive rate that the 1st step obtains is 57%, records experimental data as follows:

[0175] 2-o-biphenyl-8-hydroxyquinoline (HQ-2-biPh)

[0176] m.p.108~110℃;

[0177] UV-vis (CHCl 3 )λ max : 268, 319nm;

[0178] 1 H NMR (CDCl 3 , 500MHz) δ: 8.1 (br.s, 1H, -0H), 7.9 (m, 2H, Ar-H), 7.6 (m, 3H, Ar-H), 7.5 (m, 1H, Ar-H), 7.2~7.3(m, 4H, Ar-H), 7.1~7.2(m, 4H, Ar-H);

[0179] MS m / z (%): 298 (M + , 100), 139(21), 63(22), 51(39).

[0180] The 2-o-biphenyl-8-hydroxyquinoline zinc (Zn(Q-2-biPh) obtained in the 2nd step 2 ), productive rate is 55%, and test data is as follows:

[0181] m.p.281~282℃;

[0182] UV-vis (CHCl 3 )λ max : 290, 410nm;

[0183] FL (thin film): 561nm (λ ex =430nm) MS m / z (%): 660 (M + , 32), 36...

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Abstract

The invention provides a novel quinolyl zinc organic luminescent compound and a preparation method thereof. Moreover, the invention also provides a composite material containing the novel quinolyl zinc organic luminescent compound, a white-light organic electroluminescent device and a preparation method thereof. The white-light organic electroluminescent device prepared from the quinolyl zinc organic luminescent compound has the advantages of simple structure, good reusability, stable luminescent property of the device, etc., and is favorable for industrial mass production.

Description

technical field [0001] The invention relates to a quinoline zinc organic luminescent material and a preparation method for a white light organic electroluminescence device, belonging to the technical field of organic electroluminescence display. Background technique [0002] Due to the advantages of high brightness, light weight and low power consumption, organic electroluminescent devices (OLEDs) have become a research hotspot in the field of flat panel displays in recent years. The basic structure of organic electroluminescent devices is that different organic materials are sandwiched between the anode and the cathode, and the light emission of the device comes from the recombination of carriers in the organic light-emitting layer. At present, a large number of small molecule (or macromolecule) organic materials with hole transport properties or electron transport properties have been applied to the research of organic electroluminescent devices. Among them, in order to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D215/30C09K11/06H01L51/50H01L51/54
CPCY02B20/181
Inventor 金利通丁洪流赵婷施国跃
Owner EAST CHINA NORMAL UNIV
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