Heterocyclic Compound for OLED Driving Voltage Reduction
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Solution Overview
Problem
Current organic light emitting devices face challenges in improving performance, lifespan, and efficiency, particularly in materials used for the organic thin film, which affect driving voltage, light efficiency, and overall device stability.
Innovation Solution
A heterocyclic compound represented by Chemical Formula 1 is introduced, which can be used as a material in the organic light emitting device, serving as a hole injection, hole transport, light emitting, electron transport, or electron injection material, and is incorporated into the organic material layer to enhance device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional organic thin film materials are used, then device structure is simple, but driving voltage is high and light efficiency is poor
Solution Approach 1:
The patent applies parameter changes by modifying the molecular structure of organic thin film materials, specifically introducing heterocyclic compounds with specific functional groups and substituent patterns (R1-R6 groups) to optimize electronic properties. This changes the HOMO-LUMO energy level parameters to achieve lower driving voltage and improved light efficiency while maintaining manageable device complexity
Solution Approach 2:
The patent employs composite materials by combining multiple functional groups within the heterocyclic compound structure (X1-X6 heteroatoms, L linking groups, Z functional groups, and R1-R6 substituents) to create multifunctional materials that simultaneously provide charge transport, light emission, and stability properties, thereby reducing driving voltage and improving overall device performance
2Productivity
If conventional organic thin film materials are used, then material synthesis is simple, but light efficiency and lifespan are poor
Solution Approach 1:
The patent changes molecular parameters by designing heterocyclic compounds with specific heteroatom configurations (X1-X6), linking groups (L), and substituent patterns (R1-R6) to optimize light emission efficiency. The structured approach to material design, while more complex than conventional materials, provides systematic improvement in productivity and light efficiency
Solution Approach 2:
The patent applies local quality by introducing specific functional groups (Z groups) and substituent patterns at particular positions within the heterocyclic structure to enhance light emission properties in specific regions of the material, thereby improving overall light efficiency without requiring complete redesign of the entire material system
3Duration of action of stationary object
If conventional organic thin film materials are used, then device structure is simple, but lifespan and stability are poor
Solution Approach 1:
The patent changes structural parameters by incorporating stable heterocyclic core structures (X1-X6 heteroatoms forming rings) with appropriate substituent groups (R1-R6) that enhance thermal and chemical stability. This molecular-level parameter optimization extends device lifespan while maintaining a relatively straightforward device architecture
Solution Approach 2:
The patent addresses lifespan issues by designing organic materials with improved stability characteristics that resist degradation over time, effectively creating longer-lasting materials that replace shorter-lived conventional organics without requiring fundamentally new device architectures
4Temperature
If conventional organic thin film materials are used, then thermal stability is insufficient, but material structure is simpler
Solution Approach 1:
The patent changes thermal properties by designing heterocyclic compounds with rigid ring structures (X1-X6 heteroatoms forming stable rings), extended conjugation through linking groups (L), and appropriate substituent patterns (R1-R6) that raise glass transition temperatures and improve thermal stability without creating overly complex molecular architectures
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 heterocyclic compound reduces driving voltage, improves light efficiency, and extends the lifespan of the organic light emitting device by spatially separating Highest Occupied Molecular Orbital (HOMO) and Lowest Unoccupied Molecular Orbital (LUMO), enabling strong charge transfer and improved thermal stability.
Implementation Method 1
spatially separating HOMO and LUMO so that strong charge transfer is possible
Implementation Method 2
electrons and holes injected from the two electrodes combine in the organic thin film to form a pair, and then emit light while being disappeared
Data Source
AI summary
The present application provides a heterocyclic compound and an organic light emitting device in which the heterocyclic compound is contained in an organic material layer.