Polycyclic Boron Compound Emission Layer Efficiency
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Solution Overview
Problem
Current organic electroluminescence display devices face challenges in enhancing emission efficiency and lifetime of light emitting elements, which are crucial for improved display performance.
Innovation Solution
Incorporating a specific polycyclic compound in the emission layer of light emitting elements, where the compound is designed with a core part having a fused ring structure including a boron atom and two nitrogen atoms, and substituted or unsubstituted phenyl groups to improve resonance stability and sterically protect the boron atom, thereby enhancing emission efficiency and lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic electroluminescence materials are used in the emission layer, then the device structure remains simple, but the emission efficiency and element lifetime are insufficient
Solution Approach 1:
The patent modifies the molecular structure parameters of the emission material by incorporating a boron atom into a fused ring system and adding specific substituents (phenyl groups, carbazole groups, dibenzofuran groups). This changes the chemical composition and structural parameters of the material, leading to improved emission efficiency and element lifetime while maintaining reasonable device complexity
Solution Approach 2:
The patent creates a composite molecular structure combining boron, nitrogen, carbon, and hydrogen atoms in a specific fused ring configuration with multiple substituents. This composite structure at the molecular level provides both high emission efficiency and long element lifetime, resolving the contradiction between performance improvement and structural complexity
2Productivity
If conventional emission materials are used, then the manufacturing process remains simple, but the emission efficiency is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the emission material by introducing a boron-containing fused ring core with specific substituents. This parameter modification at the molecular level enhances emission efficiency while the synthesis process, though more complex, remains feasible through standard organic synthesis techniques
3Stability of the object's composition
If the boron atom is not protected, then the molecular structure remains simple, but the resonance stability is insufficient
Solution Approach 1:
The patent uses phenyl groups and other substituents as intermediary structures that surround and protect the boron atom. These intermediary groups stabilize the boron atom through steric protection and electronic effects, enhancing resonance stability while adding necessary structural complexity to achieve the desired performance
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 this polycyclic compound in the emission layer significantly improves the emission efficiency and extends the lifetime of light emitting elements, contributing to better display performance by stabilizing the emission process.
Implementation Method 1
the compound is designed with a core part having a fused ring structure including a boron atom and two nitrogen atoms, and substituted or unsubstituted phenyl groups to improve resonance stability
Data Source
AI summary
A light emitting element of one or more embodiments includes a first electrode, a second electrode oppositely to the first electrode, and an emission layer between the first electrode and the second electrode. The light emitting element of one or more embodiments includes a polycyclic compound represented by a specific chemical structure in the emission layer, thereby showing improved emission efficiency and life characteristics.