Indenofluorene derivative containing pyrimidyl or pyrazinyl or triazinyl group, and its application

Abstract

The invention provides a novel compound having a structure represented by formula (I). In the formula (I), R1 to R5 are respectively independently selected from C1-C20 aliphatic alkyl groups or C6-C20 aromatic groups; Ar is selected from C4-C30 aromatic rings, C4-C30 N-containing heterocyclic rings, C4-C30 condensed heterocyclic aromatic hydrocarbons, C4-C30 arylamino groups or C4-C30 aryloxy groups; n is 1 or 2; A1 to A4 are N atoms or C atoms, A2 and A4 are the C atoms when the A1 and the A3 are the N atoms, or A2 and A3 are the C atoms when A1 and the A4 are the N atoms, or A1 and A3 are the C atoms when A2 and A4 are the N atoms, or A1 and A2 are the C atoms when A3 and A4 are the N atoms, or A2 is the C atom when A1, A3 and A4 are the N atoms; and L is a singly-bonded or C6-C10 aromatic ring or a C4-C10 N-containing heterocyclic ring. The compound is used in organic electroluminescent devices as an electron transfer layer material or a luminescent host material.

Description

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AI Technical Summary

Benefits of technology

This patented inventive compound described by this patents provides technical benefits such as excellent heat resistance, strong electric field effectiveness, ability for forming films on various substrates like plastics or paper, and being able to function well as both electronic transmission layers (ETL) and light emitting hosts within displays made from these polymers.

Problems solved by technology

This patented technical problem addressed in this patent relates to developing better electronic transport layers for organic light emitting diodes (EL displays) due to their superior hole conductivity compared to traditional methods like ammonia or chloride ion sources. Current EL display technology uses expensive rare metals, while current liquid crystal display technologies require complex processes involving multiple steps. There is thus a demand for more effective electron injectors and transistors suitable for future applications without increasing costs associated therefrom.

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