Heterocyclic Emission-Layer Compound for Low-Voltage OLED Luminance
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving optimal performance in terms of luminance, driving voltage, and response speed, particularly in the integration of heterocyclic compounds within their structures.
Innovation Solution
Incorporation of a heterocyclic compound represented by Formula 1 into the interlayer or electron transport region of a light-emitting device, which includes specific configurations of carbon and nitrogen atoms, carbocyclic and heterocyclic groups, and various substituents, enhancing the device's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional materials are used in light-emitting devices, then device structure is simple, but luminance and response speed are insufficient
Solution Approach 1:
The patent introduces a heterocyclic compound with specific molecular structure parameters (Formula 1 with defined X1-X6, L1-L2, n1-n2, W1, b1, Ar1-Ar2, R1-R6 groups) to change the electrical and optical parameters of the emission layer, thereby improving luminance and response speed while maintaining structural simplicity
Solution Approach 2:
The patent employs a composite material system where the heterocyclic compound is integrated into the emission layer alongside host materials and dopants, creating a multi-component system that achieves superior luminance and response characteristics compared to conventional single-material approaches
2Power
If conventional materials are used in light-emitting devices, then device structure is simple, but driving voltage is not optimized
Solution Approach 1:
The heterocyclic compound in Formula 1 is designed with specific molecular parameters including heteroatom composition (X1-X6 where at least one is N), cyclic group structures (L1-L2), and substituent patterns (R1-R6) that optimize charge transport properties, thereby achieving optimized driving voltage through molecular parameter control rather than structural complexity
3Speed
If conventional materials are used in light-emitting devices, then manufacturing is easier, but response speed is insufficient
Solution Approach 1:
The patent achieves improved response speed by changing the molecular parameters of the emission layer material - specifically the heterocyclic compound structure in Formula 1 with defined atomic composition (X1-X6), cyclic groups (L1-L2), and substituent configurations (R1-R6) that enhance carrier recombination efficiency and exciton radiative decay rates, thereby improving response speed without complicating the manufacturing process
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 the luminance, driving voltage, and response speed of the light-emitting device, contributing to better overall performance and versatility in electronic applications.
Implementation Method 1
Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. These excitons may 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 facing the first 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: