Polycyclic Compound for Light Emitting Element Efficiency
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Solution Overview
Problem
Current organic electroluminescence display devices face challenges in achieving high light efficiency and extended service life for their light emitting elements, which are crucial for improved display quality.
Innovation Solution
A light emitting element is developed using a polycyclic compound represented by Formula 1, which includes a specific structure with a pentacyclic fused ring containing nitrogen and boron atoms, along with other compounds like those represented by Formulas HT-1, ET-1, and D-1, to enhance luminous efficiency and service life, particularly for blue light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional organic electroluminescence materials are used, then the device can achieve basic light emission, but the luminous efficiency and service life are insufficient
Solution Approach 1:
The patent modifies the molecular structure parameters of organic electroluminescence materials by introducing specific polycyclic compounds with nitrogen and boron atoms in defined positions, changing the chemical composition parameters to achieve both high luminous efficiency and extended service life simultaneously
Solution Approach 2:
The invention uses composite organic materials combining polycyclic compounds with nitrogen-containing groups and boron-containing groups, where the synergistic interaction between different molecular components achieves improved luminous efficiency and service life that cannot be obtained by single materials
2Productivity
If phosphorescence emission or TADF materials are used to improve luminous efficiency, then light emission efficiency increases, but material stability and service life remain challenging
Solution Approach 1:
The patent introduces specific functional groups (nitrogen-containing groups at certain positions, boron-containing groups at other positions) with localized specific functions into the molecular structure, where each group contributes differently to achieve both high luminous efficiency through phosphorescence or TADF mechanisms and improved material stability
Solution Approach 2:
The invention develops organic electroluminescence materials that can achieve high efficiency emission while maintaining sufficient service life, effectively extending the operational lifetime of the material beyond conventional short-lived phosphorescent or TADF materials
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly improves the luminous efficiency and service life of the light emitting element, leading to better display quality by utilizing a polycyclic compound that stabilizes the material and reduces nonradiative decay, resulting in high efficiency and long-lasting performance.
Implementation Method 1
The organic electroluminescence display device includes a so-called 'self-luminescent' light emitting element in which holes injected from a first electrode and electrons injected from a second electrode recombine in an emission layer
Implementation Method 2
technologies pertaining to phosphorescence emission utilizing triplet state energy or delayed fluorescence utilizing triplet-triplet annihilation (TTA) in which singlet excitons are generated by collision of triplet excitons
Implementation Method 3
the development of materials for thermally activated delayed fluorescence (TADF) materials utilizing delayed fluorescence phenomenon
Data Source
AI summary
A light emitting element including a first electrode, a second electrode provided on the first electrode, and an emission layer provided between the first electrode and the second electrode is provided. The emission layer includes a first compound and may exhibit high efficiency and long service life characteristics.