Luminescence auxiliary material, preparation method thereof and organic electroluminescent device

Abstract

The invention discloses a luminescence auxiliary material, a preparation method thereof and an organic electroluminescence device, and belongs to the field of chemical synthesis and photoelectric materials. The structural general formula is shown in the specification, in the formula, Ar1, ar2 and Ar3 are each independently one or more of substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted 3-to 30-membered heterocycloalkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C1-C30 alkylamino, substituted orunsubstituted C1-C30 alkoxy, substituted or unsubstituted C6-C30 arylamino, substituted or unsubstituted 3-to 30-membered heteroaryl, substituted or unsubstituted C10-C30 fused ring group, substitutedor unsubstituted C5-C30 spiro ring group. The luminescent auxiliary material can improve the luminescent efficiency and the service life of the organic electroluminescent device.

Description

technical field [0001] The invention relates to the fields of chemical synthesis and optoelectronic materials, in particular to a luminescence auxiliary material, a preparation method thereof and an organic electroluminescence device. Background technique [0002] Organic electroluminescent device (OLED) technology can be used to manufacture new display products. OLED light-emitting devices are like a sandwich structure, usually with a first electrode, a second electrode and an organic layer. In order to improve the efficiency and stability of organic electronic components, the organic layer is generally formed into a multilayer structure composed of various substances, for example, it can be composed of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer. layers are formed. [0003] In OLEDs, because the hole mobility is faster than the electron mobility, the charge imbalance in the light-emitt...

AI Technical Summary

Problems solved by technology

At present, the materials used for the luminescence auxiliary layer generally have the triplet energy level T due to their aromatic amine structure. 1 It is too low to prevent the exciton after carrier recombination from expanding to the transport layer, resulting in a decrease in luminous efficiency

In addition, most of the existing auxiliary layer materials have high vapor deposition temperature and cannot withstand long-term heating, which limits their practical application.

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