Condensed Cyclic Compound OLEDs for Brightness and Response Speed

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Solution Overview

Problem

Existing organic light-emitting devices face challenges in enhancing their performance in terms of brightness, driving voltage, and response speed, while maintaining wide viewing angles and high contrast ratios.

Innovation Solution

Incorporation of a condensed cyclic compound represented by Formula 1, comprising specific groups and substituents, into the organic layer of the device to improve charge transport and recombination efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If conventional organic light-emitting devices are used, then device structure is simple, but brightness and response speed are insufficient

Engineering Contradiction:

ImprovebrightnessVSAvoidresponse speed

Core Design Contradiction:

Illumination intensityVSProductivity

Solution Approach 1:

The patent applies parameter changes by modifying the chemical structure of organic compounds in the emission layer, specifically using condensed cyclic compounds with particular molecular configurations (Formula 1) to optimize charge transport properties and exciton recombination efficiency, thereby simultaneously improving brightness and response speed

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite materials by combining the condensed cyclic compound (Formula 1) with other organic materials in the emission layer, creating a multi-component system where the specific compound enhances charge transport while maintaining overall device performance characteristics

Inventive Principle:

Principle #40Composite materials

2Use of energy by stationary object

If driving voltage is reduced, then energy consumption decreases, but brightness and response speed may be compromised

Engineering Contradiction:

Improvedriving voltageVSAvoidbrightness

Core Design Contradiction:

Use of energy by stationary objectVSIllumination intensity

Solution Approach 1:

The patent changes the electrical parameters of the organic compounds by selecting materials with optimized HOMO-LUMO energy levels and charge mobility, allowing the device to achieve high brightness at lower driving voltages through improved charge transport efficiency in the emission layer

Inventive Principle:

Principle #35Parameter changes

3Productivity

If charge transport efficiency is improved, then response speed increases, but device complexity may increase

Engineering Contradiction:

Improveresponse speedVSAvoidcompound structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent optimizes molecular parameters of the organic compound (Formula 1) to achieve fast charge transport and exciton recombination, balancing the complexity of the condensed cyclic structure with the performance benefits of improved response speed

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 use of the condensed cyclic compound enhances the brightness and reduces the driving voltage, thereby improving the response speed and maintaining high contrast ratios and wide viewing angles.

Implementation Method 1

Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. These excitons transit from an excited state to a ground state, thereby generating light.

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12414463B2Condensed cyclic compound and organic light-emitting device including the same

Publication Date: 2025.09.09 SAMSUNG SDI CO LTD

AI summary

A condensed cyclic compound and an organic light-emitting device including the same.