Phenyl branching luminescent material and organic electroluminescent device thereof

Abstract

The invention belongs to the technical field of organic synthesis, and particularly relates to a phenyl branching luminescent material and an organic electroluminescent device thereof. According to the invention, through fine design of a hole-transport material subjected to branching twisting, a core light-emitting layer material is further selected, and a high-refraction low-absorption covering layer material is introduced, so that compared with the prior art, the device is obviously improved in comprehensive performance such as starting voltage, light emitting brightness, current efficiency,light color and thermal stability, and is obviously improved in performance stability under a state that the device is operated and heat is accumulated.

Description

technical field [0001] The invention belongs to the field of organic synthesis technology, and in particular relates to a phenyl branched luminescent material and an organic electroluminescent device. Background technique [0002] In recent years, organic light-emitting materials have the advantages of good flexibility and suitable for making large-area display devices in practical applications due to their characteristics of diverse luminous colors, adjustable luminous colors, and easy structural adjustment. hotspot. At the same time, organic light-emitting materials also have a very wide range of applications in the fields of electroluminescence, photochemical sensors, biological cell imaging, and dye-sensitized solar cells. [0003] Organic light-emitting materials can be divided into small organic molecules, conjugated polymers and metal complexes according to their basic molecular structure. Among them, organic small molecules have the characteristics of simple struct...

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Problems solved by technology

However, in practical applications, it is still a big problem to design and synthesize optoelectronic materials with excellent comprehensive properties.

For example, the electro-optic conversion coefficient is low due to the electrostatic interaction between the groups of small organic molecules, which affects the transition and recombination of electrons or holes in the material; for example, small organic molecules and metal complex luminescent materials, usually in solution It has very good fluorescence performance, but in the solid state, due to the strong interaction between molecules, aggregation-induced fluorescence quenching occurs, which makes the material luminescence attenuate, and then affects the performance of the corresponding device.

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