Heterocyclic Compound for OLED Driving Voltage Reduction

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Solution Overview

Problem

Existing organic light emitting devices face challenges in improving performance, service life, and efficiency, particularly in reducing driving voltage and enhancing light emitting efficiency.

Innovation Solution

A heterocyclic compound with a specific chemical structure, including two identical naphthobenzofuran or naphthobenzothiophene groups bonded to triazine, is used as a material for the organic light emitting device, specifically in the light emitting layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If conventional organic light emitting materials are used, then the device can operate, but the driving voltage is high and light emitting efficiency is low

Engineering Contradiction:

Improvedriving voltageVSAvoidlight emitting efficiency

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent modifies the molecular structure parameters of organic light emitting materials by introducing specific heterocyclic groups (naphthobenzofuran, naphthobenzothiophene) and controlling substitution patterns to optimize electronic properties, achieving lower driving voltage and improved light emitting efficiency simultaneously

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite molecular structures combining triazine core with naphthobenzofuran or naphthobenzothiophene groups, forming new heterocyclic compounds that exhibit superior electrical and optical properties compared to conventional materials

Inventive Principle:

Principle #40Composite materials

2Duration of action of stationary object

If the organic light emitting device operates for extended periods, then service life is improved, but performance degradation occurs

Engineering Contradiction:

Improveservice lifeVSAvoidperformance stability

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

The patent inverts the conventional approach by designing materials with built-in stability features from the molecular level, where the heterocyclic structure inherently resists degradation mechanisms, thereby extending service life while maintaining performance

Inventive Principle:

Principle #13The other way round (Inversion)

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 lowers the driving voltage, improves light emitting efficiency, and extends the service life of the organic light emitting device by facilitating charge transfer and expanding molecular conjugation.

Implementation Method 1

charge transfer is facilitated, so that there is an effect that the light emitting efficiency is increased

Methodology Applied

Scientific EffectCharge transfer:

Implementation Method 2

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

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20250179354A1Heterocyclic compound, organic light emitting device comprising same and composition for organic material layer of organic light emitting device

Publication Date: 2025.06.05 LT MATERIALS CO LTD

AI summary

Disclosed are a heterocyclic compound of Chemical Formula 1, an organic light emitting device including the same and a composition for an organic material layer of an organic light emitting device.