Dimethylenecyclohexane Compounds for OLED Driving Voltage

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional organic light emitting devices using existing compounds do not meet desired levels of driving voltage, efficiency, and color purity due to suboptimal electrical and photochemical properties.

Innovation Solution

A dimethylenecyclohexane compound with specific structural modifications, represented by formula 1, is developed for use in organic light emitting devices, enhancing thermal stability, photochemical stability, and optical properties, thereby improving driving voltage, efficiency, and color purity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional compounds are used in organic light emitting devices, then device structure and manufacturing process are simple, but driving voltage is high and efficiency is poor

Engineering Contradiction:

Improvedriving voltageVSAvoidcompound structure complexity

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by systematically modifying the molecular structure of organic compounds - specifically introducing dimethylenecyclohexane core structures with varying substituent groups (Ar1, Ar2, L1, L2) and chain lengths (n1, n2 = 1-5) to optimize electrical properties and reduce driving voltage

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material design by combining the dimethylenecyclohexane core structure with diverse aromatic substituent groups (aryl, heteroaryl groups) to create compounds with synergistic properties that simultaneously achieve low driving voltage and high efficiency

Inventive Principle:

Principle #40Composite materials

2Manufacturing precision

If conventional compounds are used in organic light emitting devices, then manufacturing process is simple, but color purity is poor

Engineering Contradiction:

Improvecolor purityVSAvoidsynthesis difficulty

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent applies local quality by introducing specific functional groups (Ar1, Ar2, L1, L2) at predetermined positions on the dimethylenecyclohexane core structure to locally enhance optical properties and achieve superior color purity in specific device regions

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses segmentation by dividing the molecular structure into distinct functional segments (core dimethylenecyclohexane structure, aromatic substituent groups, linkers) that can be independently optimized and combined to achieve desired color purity characteristics

Inventive Principle:

Principle #1Segmentation

3Stability of the object's composition

If conventional compounds are used, then thermal stability is insufficient, but device structure is simpler

Engineering Contradiction:

Improvethermal stabilityVSAvoidmolecular structure complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-designing and pre-synthesizing compounds with inherently high thermal stability through the selection of rigid aromatic groups and stable dimethylenecyclohexane core structures before device fabrication, ensuring stability is built into the material itself

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs structural rigidity through the cyclic dimethylenecyclohexane core and aromatic ring systems, which provide structural stability and resistance to thermal degradation through their rigid, planar geometries

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS7862907B2Dimethylenecyclohexane compound, method of preparing the same and organic light emitting device comprising the same

Publication Date: 2011.01.04 SAMSUNG DISPLAY CO LTD

AI summary

A dimethylenecyclohexane compound represented by formula 1, a method of preparing the same, and an organic light emitting device using the dimethylenecyclohexane are provided.The dimethylenecyclohexane compound can improve the driving voltage, efficiency and color purity of the organic light emitting device.