Fused Polycyclic Compounds for Efficient, Long-Life Light Emitting Elements
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Solution Overview
Problem
There is a demand for light emitting elements with improved light efficiency and service life in organic electroluminescence display devices, and there is a need for materials that can stabilize these characteristics.
Innovation Solution
A light emitting element comprising a first electrode, a second electrode, and an emission layer containing a fused polycyclic compound represented by specific formulas, which enhances light efficiency and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional luminescent materials are used in organic electroluminescence display devices, then the device can operate, but the light efficiency is insufficient and service life is limited
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of the luminescent material through specific formulae (Formula 1 and Formula 2) that define molecular configurations. By changing structural parameters such as substituent groups (R1-R11, Ra1-Ra14) and atomic compositions (A1-A4, Nb1-Nb6), the material achieves improved light efficiency and extended service life while maintaining operational functionality.
Solution Approach 2:
The patent employs composite materials by combining multiple functional groups and molecular components within the luminescent compound structure. The emission layer comprises a host material and a guest luminescent material (Formula 1 and Formula 2) that work together synergistically to enhance both light efficiency and device stability, resolving the contradiction between productivity and reliability.
2Productivity
If conventional luminescent materials are used, then the device structure is simple, but the light efficiency and service life cannot be simultaneously improved
Solution Approach 1:
The patent uses parameter changes to optimize the molecular structure of the luminescent material through specific formulae. By systematically varying structural parameters (substituent types, molecular configurations, atomic arrangements) within defined ranges, the invention achieves enhanced light efficiency without requiring overly complex device architecture, thus balancing productivity improvement with acceptable structural complexity.
3Productivity
If materials are developed to improve light efficiency, then productivity increases, but stability and service life may be compromised
Solution Approach 1:
The patent applies composite materials by designing emission layers with specific host-guest material combinations. The host material provides structural stability and charge transport, while the guest luminescent material (Formula 1 and Formula 2) delivers high light efficiency. This composite approach allows simultaneous achievement of improved light efficiency and maintained material stability, resolving the contradiction between productivity and compositional stability.
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 use of the fused polycyclic compound improves the light efficiency and extends the service life of the light emitting element, meeting the demands for enhanced performance in display devices.
Implementation Method 1
a self-luminescent light emitting element in which holes and electrons injected from a first electrode and a second electrode combine in an emission layer, and thus a luminescent material of the emission layer emits light
Data Source
Figure 1
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AI summary
A light emitting element including a first electrode, a second electrode on the first electrode, and an emission layer between the first electrode and the second electrode and including a first compound represented by Formula 1 below. Accordingly, the light emitting element of one or more embodiments may exhibit high efficiency and long service life characteristics.