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Fused ring compound, application thereof and organic electroluminescent device containing fused ring compound

A compound and fused ring technology, applied in the field of organic electroluminescent devices, can solve the problems of unresolved lifespan, low efficiency, and limited application of blue light materials

Pending Publication Date: 2021-07-27
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the selection of OLED materials, singlet light-emitting fluorescent materials have a long life and low price, but low efficiency; triplet light-emitting phosphorescent materials have high efficiency, but are expensive, and the life of blue light materials has not been solved.
However, due to the peripheral substituents on S 1 The effect of energy level is very small, that is, it is difficult to control the luminous color of the material, and its light color has always been limited to the blue-dark blue region, which greatly limits the application of MR-TADF materials in the fields of high-resolution display, full-color display and white lighting. further application of

Method used

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  • Fused ring compound, application thereof and organic electroluminescent device containing fused ring compound
  • Fused ring compound, application thereof and organic electroluminescent device containing fused ring compound
  • Fused ring compound, application thereof and organic electroluminescent device containing fused ring compound

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preparation example Construction

[0122] Specifically, the preparation method of the organic electroluminescent device of the present invention comprises the following steps:

[0123] 1. Ultrasonically treat the glass plate coated with the anode material in a commercial cleaning agent, rinse in deionized water, ultrasonically degrease in acetone: ethanol mixed solvent, bake in a clean environment until the water is completely removed, and use ultraviolet light Light and ozone cleaning, and bombardment of the surface with a beam of low-energy cations;

[0124] 2. Put the above-mentioned glass plate with anode in the vacuum chamber, and evacuate to 1×10 -5 ~9×10 -3 Pa, vacuum evaporating a hole injection material on the anode layer film to form a hole injection layer, and the evaporation rate is 0.1-0.5nm / s;

[0125] 3. Vacuum evaporate the hole transport material on the hole injection layer to form the hole transport layer, the evaporation rate is 0.1-0.5nm / s,

[0126] 4. On the hole transport layer, the ele...

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Abstract

The invention discloses a fused ring compound, application thereof and an organic electroluminescent device containing the fused ring compound, and belongs to the technical field of semiconductors. The fused ring compound has a structure as shown in a formula (1) or a formula (2), an aromatic ring or a heteroaromatic ring with a specific carbon atom number is taken as a core and is fused with two same boron-containing groups, so that the fused ring compound has the advantages of narrow half-peak width, high fluorescence quantum yield, high fluorescence intensity and the like. Meanwhile, the compound has high glass transition temperature and molecular thermal stability, and has proper HOMO and LUMO energy levels. The compound provided by the invention can be used as a luminescent layer doping material of an organic electroluminescent device, and can improve the luminescent color purity and prolong the service life of the device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to a condensed ring compound and its application, and an organic electroluminescent device containing the compound. Background technique [0002] Organic electroluminescent devices (OLED: Organic Light Emission Diodes) are a type of device with a sandwich-like structure, including positive and negative electrode film layers and an organic functional material layer sandwiched between the electrode film layers. Due to the advantages of high brightness, fast response, wide viewing angle, simple process, and flexibility, OLED devices have attracted much attention in the field of new display technology and new lighting technology. At present, this technology has been widely used in the display panels of new lighting fixtures, smart phones and tablet computers, and will further expand to the application field of large-size display products such as TVs. It is a new type...

Claims

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Application Information

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IPC IPC(8): C07F5/02C09K11/06H01L51/54H01L51/50
CPCC07F5/027C09K11/06C09K2211/104C09K2211/1055C09K2211/107C09K2211/1085C09K2211/1007H10K85/657H10K50/11H10K85/658H10K50/12
Inventor 段炼张跃威张东东李国孟
Owner TSINGHUA UNIV
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