Heterocyclic Compound for OLED Driving Voltage Reduction
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Solution Overview
Problem
Current organic light emitting devices face challenges in improving performance, lifetime, and efficiency due to the need for advanced materials for organic thin films that can effectively lower driving voltage and enhance light efficiency while maintaining thermal stability.
Innovation Solution
A heterocyclic compound represented by Chemical Formula 1, which includes a dibenzofuran-based structure with amine groups as substituents, is used in the organic light emitting device. This compound serves as a material for layers such as the hole injection, hole transport, light emitting, electron transport, and electron injection layers, improving current flow and thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional organic thin film materials are used, then the device structure is simple, but the driving voltage is high and light efficiency is poor
Solution Approach 1:
The patent introduces a novel heterocyclic compound structure (Formula 1) with specific molecular parameters including dibenzofuran core, aryl groups (6-60 carbon atoms), heteroaryl groups (2-60 carbon atoms), and amine substituents. These parameter changes in molecular structure optimize charge transport properties and HOMO/LUMO energy levels, enabling lower driving voltage while maintaining material complexity within acceptable ranges for organic electronics
Solution Approach 2:
The patent employs composite material strategy by combining multiple functional groups within the heterocyclic compound: the dibenzofuran core provides structural stability, aryl and heteroaryl groups enhance charge transport, and amine substituents improve hole injection. This composite molecular design achieves synergistic effects that lower driving voltage without requiring complex device structures
2Use of energy by moving object
If conventional organic thin film materials are used, then the manufacturing process is simple, but light efficiency and device performance are insufficient
Solution Approach 1:
The patent optimizes light efficiency by carefully selecting molecular parameters in Formula 1: the dibenzofuran core with specific substitution patterns (R1-R6 groups) controls HOMO/LUMO energy levels and triplet energy (T1), while amine substituents enhance electron-hole recombination efficiency. These parameter optimizations improve electroluminescence quantum efficiency without fundamentally complicating the synthesis route
Solution Approach 2:
The molecular structure is segmented into distinct functional modules: the dibenzofuran core (provides structural framework), aryl/heteroaryl groups (control energy levels and charge transport), and amine substituents (enhance hole injection and recombination). This segmentation allows independent optimization of each module while maintaining overall synthesis feasibility through modular assembly
3Duration of action of stationary object
If conventional organic thin film materials are used, then the device structure is simple, but device lifetime and thermal stability are insufficient
Solution Approach 1:
The patent enhances device lifetime and thermal stability by optimizing molecular parameters in Formula 1: the dibenzofuran core provides rigid structural framework that resists thermal degradation, aryl and heteroaryl groups with 6-60 carbon atoms enhance molecular packing and crystallinity, and amine substituents improve intermolecular interactions. These parameter changes raise glass transition temperature (Tg) and thermal decomposition temperature without excessive structural complexity
Solution Approach 2:
The patent uses composite molecular design combining dibenzofuran core (thermal stability), aryl groups (structural rigidity), heteroaryl groups (charge transport), and amine substituents (hole injection). This composite structure achieves synergistic thermal and temporal stability, extending device lifetime while keeping the molecular architecture manageable for organic electronics
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, enhances light efficiency, and increases the lifetime of the organic light emitting device by improving hole transporting ability and thermal stability, leading to better performance and longer device lifespan.
Implementation Method 1
one or more layers of the organic material layer include the heterocyclic compound represented by Chemical Formula 1... the heterocyclic compound can be used as a material for a hole injection layer, a hole transport layer... improving hole transporting ability
Implementation Method 2
When a voltage is applied to an organic light emitting device having the structure, electrons and holes injected from the two electrodes combine with each other in an organic thin film to make a pair, and then, emit light while being extinguished
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.