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A compound and preparation method, an organic light-emitting display device

A luminescent display and compound technology, applied in chemical instruments and methods, organic chemistry, luminescent materials, etc., can solve problems such as low glass transition temperature, low molecular density, and low triplet energy level

Active Publication Date: 2020-07-07
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing phosphorescent host materials have disadvantages such as low triplet energy level, low molecular density, low glass transition temperature, and poor molecular thermal stability.

Method used

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  • A compound and preparation method, an organic light-emitting display device
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  • A compound and preparation method, an organic light-emitting display device

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Experimental program
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Embodiment approach

[0085] According to one embodiment of the present invention, the compound is selected from:

[0086]

[0087] Any one of them; Gaussian calculation results show that these structures have stronger electron-accepting capabilities, and the designed molecular triplet energy level is higher. In addition, these structures can also be easily synthesized or purchased directly.

[0088] Among them, D 1 and D 2 Each of them is independently selected from one or more of anilino group, aniline derivative substituent, carbazole derivative substituent, acridinyl group and acridine derivative substituent.

[0089] Among them, D 1 and D 2 Each unoccupied C atom on the phenyl group is substituted separately. D. 1 and D 2 Groups can be ortho, meta or para linked. When the position of the substituent is different, it may affect the conjugation effect, inductive effect, and configuration transformation of the molecule. According to one embodiment of the present invention, D 1 and D ...

Embodiment 1～16

[0197] Using density functional theory (DFT), for compound H1 to compound H16, using Gaussian 09 program package at B3LYP / 6-31G(d) calculation level, the distribution of molecular frontier orbitals was optimized and calculated.

[0198] figure 1 The orbital arrangement of compound H9 is shown, wherein, figure 1 (a) is the HOMO energy level distribution diagram of compound H9, figure 1 (b) is the LUMO energy level distribution diagram of compound H9. From figure 1 It can be clearly seen that the HOMO and LUMO of compound H9 are respectively arranged on different units, achieving a better separation between the donor and the donor, which is beneficial to the resonance between the donor and the donor group, Reduce energy difference △E between systems ST , thereby improving the intersystem crossing ability from singlet to triplet.

[0199] Among them, the relevant data of compounds H1-H16 are shown in Table 1. It can be seen from Table 1 that the triplet energy levels of the...

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Abstract

The invention relates to the technical field of organic electroluminescence materials, in particular to a compound and a preparation method, and an organic light-emitting display device. The compound has the structure shown below: the compound according to the present invention is applied in an organic electroluminescent device, and can be used as a host material, a doping material, a hole transport layer material, an electron transport layer material, and a capping layer material, and can reduce Drive voltage, improve luminous efficiency, brightness, thermal stability, color purity and device life.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence materials, in particular to a compound and a preparation method, and an organic light-emitting display device. Background technique [0002] The luminescent mechanism of organic electroluminescent materials (OLED) can be divided into two types: electroluminescent luminescence and electrophosphorescence. Fluorescence is the radiative attenuation transition of singlet excitons, and phosphorescence is caused by the radiative decay of triplet excitons to the ground state. emitted light. The internal quantum efficiency of fluorescent materials does not exceed 25%, while the internal quantum efficiency of electrophosphorescent materials theoretically reaches 100%. [0003] However, the existing phosphorescent host materials have disadvantages such as low triplet energy level, low molecular density, low glass transition temperature, and poor molecular thermal stability. Contents of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D401/10C07D405/14C07D241/48C07D417/14C07D471/04C07D495/04C07D519/00C07D401/14C07D413/14C07D241/46C09K11/06H01L51/50H01L51/54H01L27/32
CPCC09K11/06C07D241/46C07D241/48C07D401/10C07D401/14C07D405/14C07D413/14C07D417/14C07D471/04C07D495/04C07D519/00C09K2211/1088C09K2211/1092C09K2211/1044C09K2211/1059C09K2211/1033C09K2211/1037C09K2211/1007C09K2211/1011C09K2211/1014C09K2211/1029H10K59/00H10K85/636H10K85/633H10K85/631H10K85/654H10K85/6574H10K85/6572H10K85/657H10K50/11
Inventor 张磊王湘成高威牛晶华
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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