Heterocyclic Compound for OLED Emission Layer Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic light-emitting devices face challenges in achieving high luminescence efficiency, low driving voltage, and improved lifespan due to limitations in the materials used in the emission layer.
Innovation Solution
Incorporation of a heterocyclic compound, represented by Formula 1, which includes a benzothienocarbazole or benzofuranocarbazole group with a Group 14 element-containing substituent, enhances material stability and controls interaction with phosphorescent dopants, resulting in increased triplet energy and improved luminescence efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials are used in the emission layer, then the device structure is simple, but luminescence efficiency is low and lifespan is short
Solution Approach 1:
The patent modifies the chemical structure parameters of the emission layer materials by introducing specific heterocyclic groups (benzothienocarbazole or benzofuranocarbazole) with Group 14 element-containing substituents. This structural parameter change increases triplet energy levels and improves material stability, directly extending device lifespan while maintaining reasonable structural complexity through systematic molecular design
Solution Approach 2:
The patent employs composite material strategies by combining heterocyclic core structures with Group 14 element-containing substituent groups. This creates composite organic compounds that exhibit enhanced triplet energy and improved stability, resolving the contradiction between material complexity and device reliability through synergistic molecular composition
2Productivity
If conventional emission layer materials are used, then the manufacturing process is simple, but luminescence efficiency is low
Solution Approach 1:
The patent changes the chemical parameters of emission materials by incorporating heterocyclic groups with specific triplet energy levels above 2.7 eV. This parameter optimization enhances luminescence efficiency by improving exciton management and reducing non-radiative decay, while the modular molecular design maintains manufacturing feasibility through established organic synthesis routes
3Power
If conventional materials are used, then the device is easy to manufacture, but driving voltage is high
Solution Approach 1:
The patent modifies the electronic parameters of emission layer materials by selecting heterocyclic compounds with optimized HOMO-LUMO energy levels and improved charge transport properties. These parameter changes reduce energy barriers for carrier injection and recombination, lowering driving voltage requirements while maintaining ease of manufacture through compatibility with existing vacuum deposition and solution processing techniques
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 leads to a light-emitting device with low driving voltage, excellent efficiency characteristics, and enhanced lifespan, particularly in emitting blue light with a maximum emission wavelength between 430 nm to 480 nm.
Implementation Method 1
controls interaction with phosphorescent dopants, resulting in increased triplet energy and improved luminescence efficiency
Implementation Method 2
Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. The excitons transition from an excited state to a ground state, thereby generating light
Data Source
AI summary
Embodiments provide a heterocyclic compound, a light-emitting device including the heterocyclic compound, an electronic apparatus including the light-emitting device, and an electronic equipment including the light-emitting device. The light-emitting device includes a first electrode, a second electrode, an interlayer between the first electrode and the second electrode and including an emission layer, and the heterocyclic compound. The heterocyclic compound is represented by Formula 1, which is explained in the specification.