Tetra-aryl pyrene derivative, preparation method and application thereof and electroluminescent device

Abstract

The invention discloses a tetra-aryl pyrene derivative, a preparation method and application thereof and an electroluminescent device. The tetra-aryl pyrene derivative is a 1,3,5,9-tetra-aryl pyrene derivative and has a structural general formula shown in the specification, wherein Ar represents one of formulae shown in the specification. The tetra-aryl pyrene derivative has a non-planar butterfly-shaped rigid structure; through being connected with other groups of high fluorescence quantum efficiency, the rigidity of a whole compound molecule can be excellently improved, the vitrification transforming temperature of a compound is increased, the stability of light emitting devices is further improved, meanwhile, the accumulation of pi-pi among compound molecules is inhibited, the red shift degree of an electroluminescence spectrum is lowered, and the efficiency of fluorescence emitting devices is increased.

Description

technical field [0001] The invention relates to the field of organic luminescent materials, in particular to a tetraarylpyrene derivative, a preparation method and application, and an electroluminescent device. Background technique [0002] After more than 20 years of development of organic light-emitting diodes (OLEDs), more and more organic light-emitting materials have been developed, and some groups that were first used in blue-light fluorescent light-emitting materials have also been further improved, such as anthracene , naphthalene , Philippine and pyrene etc. have a relatively large energy band width, which can well meet the requirements of blue-light fluorescent light-emitting materials. [0003] From the molecular structural formula of the above materials, it can be found that the groups such as anthracene, naphthalene, phenanthrene and pyrene used in blue-light fluorescent materials have relatively good planarity, so when the structure of their derivatives...

AI Technical Summary

Problems solved by technology

[0003] From the molecular structural formula of the above materials, it can be found that the groups such as anthracene, naphthalene, phenanthrene and pyrene used in blue-light fluorescent materials have relatively good planarity, so when the structure of their derivatives does not break the planarity, it can be used in fluorescent light-emitting materials. The light-emitting layer of the device is easy to form π-π stacking, which causes the red-shift of the light-emitting spectrum of the fluorescent device, and at the same time forms more excimers, resulting in a decrease in device efficiency

Many reported planar compounds containing groups such as anthracene, naphthalene, phenanthrene, and pyrene lead to spectral red shifts due to their special coplanarity, and device efficiency decreases

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