Compound containing 1,2,4-triazine group and organic electroluminescence device of compound

Abstract

The invention provides an organic electroluminescence compound which is shown as a structural formula I (please see the formula in the description) and contains a 1,2,4-triazine group. The compound has the good heat stability, the high luminous efficiency and the high luminous purity and can be used for manufacturing an organic electroluminescence device and applied to the field of organic solar cells or organic thin film transistors or organic photoreceptors and the like. The invention further provides the organic electroluminescence device. The organic electroluminescence device comprises an anode, a cathode and organic layers, wherein the organic layers comprise one or more than one of a luminous layer, a hole injection layer, a hole transporting layer, a hole blocking layer, an electron injection layer and an electron transporting layer, and at least one of the organic layers contains the compound shown as the structural formula I (please see the formula in the description).

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to an organic electroluminescent compound containing 1,2,4-triazine groups and an organic electroluminescent device thereof, which belongs to the technical field of display of organic electroluminescent devices. Background technique [0002] Organic electroluminescent devices (OLEDs) are devices prepared by depositing a layer of organic materials between two metal electrodes by spin coating or vacuum evaporation. A classic three-layer organic electroluminescent device includes a hole transport layer, emissive layer and electron transport layer. The holes generated by the anode are combined with the electrons generated by the cathode through the hole transport layer to form excitons in the light emitting layer through the hole transport layer, and then emit light. Organic electroluminescent devices can be adjusted to emit various required lights by changing the ma...

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Problems solved by technology

In addition, when the OLED device is operated with an applied voltage, it will generate Joule heat, which makes the organic material easy to crystallize, which affects the life and efficiency of the device. Therefore, it is also necessary to develop stable and efficient organic electroluminescent materials.

[0005] In OLED materials, since most organic electroluminescent materials transport holes faster than electrons, it is easy to cause an imbalance in the number of electrons and holes in the light-emitting layer, so that the efficiency of the device is relatively low.

Tris(8-hydroxyquinoline)aluminum (Alq 3 ) has been widely studied since its invention, but as an electron transport material, its electron mobility is still very low, and it will degrade itself. In the device using it as an electron transport layer, there will be a voltage drop , at the same time, due to the lower electron mobility, a large number of holes enter the Alq 3 In the layer, the excess holes radiate energy in a non-luminescent form, and when used as an electron-transporting material, its application is limited due to its green-emitting properties.

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