Organic Electroluminescence Device Novel Compound Emission

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Solution Overview

Problem

Current organic electroluminescence devices face challenges in achieving high luminous efficiency due to limitations in the materials used for the emitting layer, which affect the recombination of holes and electrons.

Innovation Solution

The use of specific compounds represented by formulas (1-1), (1-2), and (1-3) in the organic layers, which include substituted or unsubstituted fused aryl rings, heterocyclic rings, and benzene rings, enhancing the efficiency of hole and electron injection and recombination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional materials are used in the emitting layer, then device structure is simple, but luminous efficiency is low

Engineering Contradiction:

Improveluminous efficiencyVSAvoidmaterial structure complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent changes the chemical structure parameters of the emitting layer materials by introducing specific compounds with fused aryl rings and heterocyclic rings (formulas 1-1, 1-2, 1-3), which have optimized molecular weights and structural characteristics that enhance carrier recombination efficiency and luminous efficiency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material design by combining specific compounds (formulas 1-1, 1-2, 1-3) with other organic materials in the emitting layer to create a composite system that achieves high luminous efficiency while maintaining reasonable device complexity

Inventive Principle:

Principle #40Composite materials

2Productivity

If conventional emitting layer materials are used, then manufacturing is simple, but hole and electron recombination efficiency is poor

Engineering Contradiction:

Improverecombination efficiencyVSAvoidmaterial synthesis complexity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent optimizes recombination efficiency by changing the molecular parameters of the emitting layer compounds, specifically using compounds with fused aryl rings and heterocyclic rings that provide better charge transport and recombination characteristics

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The specific compounds (formulas 1-1, 1-2, 1-3) act as intermediary materials that facilitate efficient hole and electron recombination in the emitting layer, serving as a bridge between charge carriers and light emission

Inventive Principle:

Principle #24Intermediary (Mediator)

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

These compounds improve the luminous efficiency of organic electroluminescence devices by optimizing the recombination process, leading to enhanced light emission and device performance.

Implementation Method 1

When a voltage is applied to an organic electroluminescence device, holes are injected to an emitting layer from an anode and electrons are injected to an emitting layer from a cathode. In the emitting layer, injected holes and electrons are re-combined and excitons are formed.

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12262634B2Organic electroluminescence device and novel compound

Publication Date: 2025.03.25 IDEMITSU KOSAN CO LTD

AI summary

An organic electroluminescence device comprising:a cathode,an anode, andat least one organic layer disposed between the cathode and the anode, whereinat least one layer of the at least one organic layer comprises a compound represented by the following formulas (1-1) and (1-3) or a compound represented by the following formulas (1-2) and (1-3).