Heterocyclic Interlayer Materials for Low-Voltage Light Emission
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Solution Overview
Problem
Current light-emitting devices face limitations in achieving high efficiency, low driving voltage, and long lifespan due to inadequate hole transportability and luminance performance.
Innovation Solution
Incorporation of a heterocyclic compound represented by Formula 1, which includes specific structural features such as amine groups and resonance structures, enhancing hole transportability and luminescence efficiency by forming a suitable interlayer in the light-emitting device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials are used in the interlayer, then device structure is simple, but hole transportability and luminance performance are insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of the interlayer material by introducing specific heterocyclic groups (Formula 1) with amine groups and resonance structures. This changes the material's electronic properties to enhance hole transportability and luminescence efficiency without fundamentally altering the device architecture.
Solution Approach 2:
The patent employs a composite molecular structure combining heterocyclic groups with specific ring structures (Formulae 2-4) and substituent groups (R1, R21-R44). This composite approach creates a material with optimized properties for both hole transport and luminescence, resolving the contradiction between performance and structural simplicity.
2Productivity
If conventional compounds are used, then driving voltage may be maintained, but efficiency and lifespan are limited
Solution Approach 1:
The patent changes the energy level parameters of the interlayer material through the heterocyclic compound structure, optimizing the energy alignment between layers. This reduces energy loss at interfaces and improves overall luminance efficiency while extending device lifespan.
Solution Approach 2:
The patent converts potential energy loss mechanisms into beneficial effects by designing the heterocyclic compound to facilitate efficient charge recombination and exciton formation. The resonance structures and amine groups help convert carrier energy into light emission rather than heat, improving efficiency and reducing energy loss.
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 use of the heterocyclic compound improves the light-emitting device's efficiency, reduces driving voltage, and extends its lifespan by facilitating better hole transport and luminescence performance.
Implementation Method 1
the heterocyclic compound represented by Formula 1, due to excellent or suitable hole transportability of the heterocyclic compound represented by Formula 1, the light-emitting device may have a high efficiency, a low voltage, a high luminance, and long lifespan characteristics. improved hole transportability may be realized due to the resonance structure.
Implementation Method 2
Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. These excitons transition from an excited state to a ground state to thereby generate light.
Data Source
AI summary
A light-emitting device includes: a first electrode; a second electrode facing the first electrode; an interlayer between the first electrode and the second electrode, the interlayer including an emission layer; and a heterocyclic compound represented by Formula 1:Formula 1 may be understood by referring to the description of Formula 1 provided herein. An electronic apparatus may include the light-emitting device.