Anthracene Core Compound for OLED Emission Layer Efficiency

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Solution Overview

Problem

Existing organic light-emitting devices face challenges in achieving high luminescent efficiency due to limitations in the materials used in the emission layer.

Innovation Solution

The use of a compound with an anthracene core, a condensed cyclic substituent, and specific substituents such as aryl, carbocyclic, and heterocyclic groups in the emission layer, which enhances luminescent efficiency through delayed electroluminescence components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional materials are used in the emission layer, then device structure remains simple, but luminescent efficiency is insufficient

Engineering Contradiction:

Improveluminescent efficiencyVSAvoidcompound structure complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent changes the chemical parameters of the emission layer by introducing a specific compound with anthracene core and condensed cyclic substituents (Formula 2-1 or 2-2), transforming the molecular structure to achieve delayed fluorescence with 30-60% delayed EL component, thereby improving luminescent efficiency without significantly complicating the device structure

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite molecular structure combining anthracene core with condensed cyclic substituents (Formula 2-1 or 2-2) and additional aryl/carbocyclic/heterocyclic groups, creating a sophisticated organic compound that enables delayed fluorescence mechanism, thus resolving the contradiction between material performance and structural simplicity

Inventive Principle:

Principle #40Composite materials

2Productivity

If emission layer materials are not optimized, then manufacturing process remains simple, but luminescent efficiency is limited

Engineering Contradiction:

Improveluminescent efficiencyVSAvoidmaterial synthesis complexity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent optimizes the chemical parameters of the emission material by designing a compound with specific structural features (anthracene core, condensed cyclic substituents Formula 2-1 or 2-2, and additional substituents), which enables delayed fluorescence mechanism and improves luminescent efficiency while maintaining reasonable synthetic accessibility through defined substitution patterns

Inventive Principle:

Principle #35Parameter changes

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 proposed solution achieves improved luminescent efficiency by increasing the delayed electroluminescent component to account for 30% to 60% of measured luminescent components, thereby enhancing the overall performance of the organic light-emitting device.

Implementation Method 1

according to a transient electroluminescence (EL) analysis in which a graph showing luminescent intensity measured by applying a pulse of 400 μs at a frequency of 10 Hz at a driving voltage of required luminance is converted by using a 1/(square root) function and 1/(intercept)2 is obtained, a delayed EL component in the compound may account for about 30% to about 60% of measured luminescent components

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12284909B2Organic light-emitting device and compound

Publication Date: 2025.04.22 SAMSUNG DISPLAY CO LTD

AI summary

Provided are an organic light-emitting device having improved luminescent efficiency and a compound.