Heterocyclic OLED Interlayer for Higher Luminance and Lower Voltage
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Solution Overview
Problem
Existing light-emitting devices, particularly organic light-emitting devices, face challenges in optimizing performance parameters such as luminance, driving voltage, and response speed while maintaining wide viewing angles and high contrast ratios.
Innovation Solution
Incorporation of a heterocyclic compound represented by Formula 1 into the interlayer of a light-emitting device, comprising specific structural components and substituents, enhances the device's performance by optimizing charge transport and recombination processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional organic light-emitting devices are used, then wide viewing angles and high contrast ratios are achieved, but luminance, driving voltage, and response speed cannot be optimized simultaneously
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of the emission layer through the introduction of heterocyclic compounds with specific substituents (Formula 1). This structural parameter change optimizes charge transport properties, enabling simultaneous improvement of luminance, driving voltage, and response speed without compromising the wide viewing angles and high contrast ratios inherent to organic light-emitting devices
2Productivity
If the heterocyclic compound is incorporated into the emission layer, then charge transport and recombination processes are optimized, but device structure complexity increases
Solution Approach 1:
The patent employs composite materials by combining the heterocyclic compound (Formula 1) with other emission layer components. This composite approach creates a synergistic effect where the heterocyclic compound specifically enhances charge transport and recombination, while the overall emission layer maintains the functional properties needed for wide viewing angles and high contrast ratios, thus improving productivity without excessive complexity
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 improves luminance, reduces driving voltage, and increases response speed, thereby enhancing the overall performance of the light-emitting device.
Implementation Method 1
Holes provided from the first electrode move toward the emission layer through the hole transport region, while electrons provided from the second electrode move toward the emission layer through the electron transport region
Implementation Method 2
These carriers, namely the holes and electrons, recombine in the emission layer to produce excitons. The excitons may transition and decay from an excited state to a ground state, thereby generating light
Data Source
AI summary
A light-emitting device includes a first electrode, a second electrode opposite to the first electrode, an interlayer between the first electrode and the second electrode, and a heterocyclic compound represented by Formula 1. In addition, there are provided an electronic apparatus including the light-emitting device, and the heterocyclic compound represented by Formula 1: