Spiro Structure Compound for OLED Efficiency and Lifetime

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Solution Overview

Problem

There is a continuous need for developing new materials to improve the efficiency and stability of organic light emitting devices, particularly in terms of driving voltage and lifetime characteristics.

Innovation Solution

A spiro structure compound represented by Chemical Formula 1 is used as a material for the organic material layer in an organic light emitting device, which includes a specific structure with various substituents and bonding configurations, enhancing the device's efficiency and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

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

Engineering Contradiction:

Improvedevice efficiencyVSAvoiddriving voltage

Core Design Contradiction:

ProductivityVSUse of energy by stationary object

Solution Approach 1:

The patent modifies the molecular structure of organic materials by introducing spiro compounds with specific chemical formulas and substituent groups, changing the physical and chemical parameters of the material to achieve lower driving voltage and higher efficiency in organic light emitting devices

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite organic material systems incorporating spiro compounds as host materials doped with guest materials, creating multi-component systems that synergistically improve device efficiency and reduce operating voltage through optimized energy transfer and charge transport

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional organic materials are used in organic light emitting devices, then the device can operate, but the lifetime characteristics are poor

Engineering Contradiction:

Improvedevice lifetimeVSAvoiddevice lifetime

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent changes the chemical structure parameters of organic materials to spiro compounds with specific molecular geometries and electronic properties, which improve device lifetime by reducing material degradation and enhancing operational stability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses organic small molecule materials that can be precisely synthesized and controlled, replacing less stable conventional materials to achieve extended device lifetime through improved material robustness and resistance to degradation

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 spiro structure compound improves the efficiency and reduces the driving voltage of organic light emitting devices while extending their lifetime, as demonstrated in the provided examples.

Implementation Method 1

An organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy by using an organic material

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS10781366B2Spiro compound and organic light-emitting device comprising same

Publication Date: 2020.09.22 LG CHEM LTD

AI summary

The present specification relates to a spiro structure compound and an organic light emitting device including the same.