Silicon-fluorene derivative for electrogenerated blue-light emitting materials

Abstract

The invention provides a silicon-fluorene derivative for electrogenerated blue-light emitting materials. The silicon-fluorene derivative has a structure shown as general formula (I) in the specification, wherein R1-R7 are independently selected from H, C1-C8 chain alkyl, C1-C8 alkoxy, cyano, substituted or unsubstituted C6-C30 aromatic group, substituted or unsubstituted C6-C30 heterocyclic aromatic group, or -NR8R9 respectively, and R8 and R9 are independently selected from C1-C8 chain alkyl, C1-C8 alkoxy, substituted or unsubstituted C6-C30 aromatic group, substituted or unsubstituted C6-C30heterocyclic aromatic group respectively; and X is N or P. The invention also provides a blue-light emitting host material, an electron transport layer material, a hole transport layer material and an OLED device containing the silicon-fluorene derivative, and the silicon-fluorene derivative exhibits excellent hole transport performance, solubility, thermal stability, and has the advantages of wide energy band, high glass transition temperature, difficult crystallization and the like.

Description

technical field [0001] The invention relates to a compound, in particular to a silicon fluorene derivative used in an electroluminescent blue light material. Background technique [0002] Organic electroluminescence is hailed as the most potential next-generation flat-panel display technology by the industry and academia. It has the advantages of low power consumption, wide viewing angle, fast response, lighter and thinner, and flexible display. [0003] As a new display technology, organic light-emitting diodes (OLEDs) have unparalleled advantages in various performances of existing display technologies, such as all-solid-state, self-luminous, high brightness, high resolution, wide viewing angle (170 degrees Above), fast response, thin thickness, small size, light weight, flexible substrate, low voltage DC drive (3-10V), low power consumption, wide operating temperature range, etc., making it a very wide range of application markets, such as Lighting systems, communication...

AI Technical Summary

Problems solved by technology

Therefore, it is generally required that the energy gap of the host material should be greater than that of the guest luminescent material, otherwise it is easy to cause energy to return from the guest luminescent body to the host material and reduce the efficiency of the device; in addition, it also affects the crystallization properties of the host material and There is a higher requirement on the glass transition temperature

[0006] In fact, although the scope of OLED applications continues to expand, there are still deficiencies. For example, some existing OLED materials have insufficient hole transport, low luminous efficiency, low thermal stability, narrow energy band, and low solubility. A series of problems, and the fundamental factor that determines the performance of OLEDs is the choice of materials. Therefore, designing and finding a compound as a new OLED material to overcome the shortcomings in the actual application process is the key point in the research work of OLED materials. Focus and future R&D trends

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