Heterocyclic Compound for OLED Driving Voltage Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic light emitting devices face challenges in enhancing performance, efficiency, and lifetime due to limitations in materials used for the organic thin film, particularly in achieving optimal electron transfer and charge generation.
Innovation Solution
A hetero-cyclic compound represented by Chemical Formula 1 is introduced, which can be used as a material for various organic layers in an organic light emitting device, including hole injection, hole transfer, light emitting, electron transfer, and charge generation layers, offering improved electron migration and thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic thin film materials are used, then the device structure is simple, but the performance, efficiency, and lifetime are limited
Solution Approach 1:
The patent modifies the molecular structure of organic compounds by changing chemical parameters such as introducing heteroatoms (N, O, S) into cyclic structures, adjusting conjugation lengths, and modifying substituent groups to optimize electronic properties including HOMO/LUMO energy levels, charge mobility, and thermal stability for enhanced device performance
Solution Approach 2:
The patent employs composite organic material systems combining host materials, dopant materials, and functional additives in specific ratios to create multicomponent thin films that achieve synergistic effects for improved charge transport, light emission, and device stability
2Use of energy by moving object
If materials with optimal electron transfer properties are used, then light efficiency is enhanced, but driving voltage increases
Solution Approach 1:
The patent applies different functional materials with optimized local properties to specific device regions - using materials with specific HOMO/LUMO energy level alignments at charge injection interfaces, specialized electron transport materials in electron transfer layers, and tailored light-emitting materials in emission layers to achieve efficient charge transport and light emission at reduced voltage
3Ease of manufacture
If conventional organic materials are used, then the device is easy to manufacture, but electron transfer and charge generation are suboptimal
Solution Approach 1:
The patent utilizes small-molecule organic compounds and solution-processable materials that can be deposited via low-cost techniques such as spin-coating, dip-coating, or inkjet printing, replacing complex vacuum deposition processes while maintaining or improving charge transport efficiency through molecular design
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 hetero-cyclic compound reduces driving voltage, enhances light efficiency, and extends the lifetime of the device with its thermal stability, leading to improved performance and efficiency in organic light emitting devices.
Implementation Method 1
electrons and holes injected from the two electrodes bind and pair in the organic thin film, and light emits as these annihilate
Implementation Method 2
enhance lifetime properties of the device with thermal stability of the compound
Implementation Method 3
electrons and holes injected from the two electrodes bind and pair in the organic thin film, and light emits as these annihilate
Data Source
AI summary
The present specification relates to a hetero-cyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.