Phenanthroline Derivative Material for High Luminance and Durability
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Solution Overview
Problem
Existing organic EL elements face challenges in achieving both high luminance efficiency and extended durability life, despite advancements in phenanthroline derivatives with terpyridine, pyrene, dibenzofuran, and other skeletons.
Innovation Solution
The development of an organic EL element material represented by the general formula (1), which includes a phenanthroline derivative with specific substituents and linkages, enhancing charge transportability and coordinating properties with metal atoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If phenanthroline derivatives with terpyridine, pyrene, or dibenzofuran skeletons are used, then luminance efficiency is improved, but durability life is insufficient to meet increasing requirements
Solution Approach 1:
The patent employs composite materials by combining phenanthroline derivatives with specific aryl groups (terpyridine, pyrene, dibenzofuran skeletons) to create a material that simultaneously achieves high luminance efficiency and extended durability life, resolving the contradiction between these two performance parameters
Solution Approach 2:
The patent modifies molecular parameters by introducing specific substituent groups (aryl groups with terpyridine, pyrene, or dibenzofuran skeletons) onto the phenanthroline derivative core, changing the material's chemical parameters to achieve both high luminance efficiency and long durability life
2Power
If existing phenanthroline derivatives are used to achieve high luminance efficiency, then driving voltage is reduced, but durability life remains insufficient
Solution Approach 1:
The patent uses composite materials combining phenanthroline derivatives with specific aryl group skeletons (terpyridine, pyrene, dibenzofuran) to achieve both low driving voltage and extended durability life simultaneously
Data Source
AI summary
Disclosed is an organic EL element material represented by the following general formula (1):wherein, in the general formula (1), any one of X1 to X3 is a nitrogen atom, and others are methine groups; L1 is a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, or substituted or unsubstituted anthrylene group; L2 is single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, or a substituted or unsubstituted anthrylene group, in which when these groups are substituted, the substituent is an alkyl group or an alkoxy group; A is a phenyl group or a pyridyl group; and n is 0 or 1. An organic EL element excellent in luminance efficiency and durability life is provided.