Organic electroluminescent material and luminescent device with same

An electroluminescent material and luminescent technology, applied in luminescent materials, electrical solid devices, electrical components, etc., can solve the problems of relaxation, inability to obtain narrow-band optical characteristics, spectral Stokes shift, etc.

Inactive Publication Date: 2017-12-01
AAC TECH NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The molecular structure of traditional TADF materials determines that it cannot obtain narrow-band optical properties. This is because the traditional TADF materials are D-A separation, HOMO-LUMO separation chemical structure, resulting in excited state molecules (S 1 ,T 1 ) structural relaxation (Structural relaxation), resulting in a Stokes shift in the spectrum, thus forming a FWHM of 60-100nm

Method used

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  • Organic electroluminescent material and luminescent device with same
  • Organic electroluminescent material and luminescent device with same
  • Organic electroluminescent material and luminescent device with same

Examples

Experimental program
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Effect test

preparation example 1

[0148] Synthesis and characterization of the compound CZTPAB-1 in Preparation Example 1.

[0149]

[0150] The chlorine substituent A of dicarbazole was used as raw material to prepare CZTPAB-1.

[0151] Take 1mol of compound A, add 1.2mol tert-butyllithium, tert-butylbenzene, keep warm at 60°C for 2 hours, cool down to room temperature, add 1.2mol BBr dropwise 3 After fully reacting for half an hour, water was added to precipitate a solid, which was washed with n-hexane in turn and recrystallized with ethanol to obtain compound CZTPAB-1 with a yield of 40%.

[0152] CZTPAB-1 in CH 2 Cl 2 The UV absorption spectrum of the solution is as image 3 As shown, there is the strongest absorption intensity near 420nm, the wavelength of the S1 state (ie S0->S1 electronic transition) in the ultraviolet absorption spectrum is 421.74nm, and the burst intensity is 0.367, which is mainly the electronic transition property of HOMO→LUMO.

[0153] The carbon NMR spectrum of CZTPAB-1 is ...

preparation example 2

[0157] Preparation Example 2: Synthesis and Characterization of CZTPAB-2

[0158]

[0159] The preparation method is basically the same as in Example 1.

[0160] The carbon NMR spectrum of CZTPAB-2 is as follows Figure 8 As shown, the H NMR spectrum is shown as Figure 9 shown.

preparation example 3

[0161] Preparation Example 3: Synthesis and Characterization of CZTPAB-3

[0162]

[0163] The preparation method is basically the same as in Example 1.

[0164] The carbon NMR spectrum of CZTPAB-3 is as follows Figure 10 As shown, the H NMR spectrum is shown as Figure 11 shown.

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Abstract

The invention relates to the technical field of organic luminescent materials, in particular to an organic electroluminescent material and a luminescent device with the same. The organic electroluminescent material comprises selected chemical compounds shown as a general formula I or a general formula II. The organic electroluminescent material and the luminescent device have the advantages that electron pushing and pulling common planes are formed by an electron donating Donor and an electron sucking Acceptor, and accordingly rigid molecular structures can be obtained; HOMO-LUMO (highest occupied molecular orbits-lowest unoccupied molecular orbits) are separated from one another to a certain extent, and accordingly the organic electroluminescent material and the luminescent device are narrow in FWHM (full width at half maximum) and have high transition rate constants Kr.

Description

technical field [0001] The invention relates to the technical field of organic light-emitting materials, in particular to an organic electroluminescence material and a light-emitting device thereof. Background technique [0002] According to the mechanism of electroluminescence, OLED materials are divided into fluorescent OLED materials and phosphorescent OLEDs. Fluorescent OLED materials are purely organic materials that do not contain heavy metals. Therefore, in theory, they can only achieve an internal quantum efficiency of 25%, resulting in a theoretical upper limit of 5% for the external quantum efficiency of fluorescence. Phosphorescent luminescent materials can theoretically achieve 100% quantum luminous efficiency due to the effect of heavy metals. [0003] Recently, thermally activated delayed fluorescence (TADF) material has received widespread attention, which is a kind of OLED material that uses energy up-conversion mechanism to emit light. Due to the separatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/54
CPCC09K11/06C07F5/027C09K2211/1007C09K2211/1029C09K2211/1011C09K2211/104C09K2211/1096H10K85/636H10K85/633H10K85/631H10K85/615H10K85/657
Inventor 谢再锋马腾达
Owner AAC TECH NANJING
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