Triazine Polymer Light-Emitting Device

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Solution Overview

Problem

Existing organic light-emitting elements using polymer compounds face challenges in achieving low driving voltage, high luminous efficiency, and maximum attainable brightness.

Innovation Solution

Incorporating a polymer compound with constitutional units derived from electron transport and phosphorescent polymerizable compounds, along with a hole transport polymerizable compound, to form a light-emitting layer between an anode and a cathode, which enhances carrier transport properties and luminance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a low-molecular compound is used to form the organic layer, then the layer can be formed by vacuum deposition method, but vacuum equipment is necessary and the film thickness is liable to become ununiform

Engineering Contradiction:

Improvelayer formation methodVSAvoidvacuum equipment requirement

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The invention changes the molecular weight parameter of the organic compound from low-molecular to polymer form, which fundamentally alters the deposition characteristics and enables solution-based processing methods instead of vacuum deposition

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention replaces the mechanical vacuum deposition system with a chemical solution-based coating system, substituting complex vacuum equipment with simple solution preparation and deposition processes

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If a low-molecular compound is used to form the organic layer, then the layer can be formed by vacuum deposition method, but the film thickness is liable to become ununiform

Engineering Contradiction:

Improvelayer formation methodVSAvoidfilm thickness uniformity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

Changing from low-molecular compound to polymer compound fundamentally changes the deposition behavior, allowing solution-based methods that produce more uniform films through controlled drying and solvent evaporation processes

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention introduces a solution as an intermediary medium between the organic compound and the substrate, allowing for more controlled and uniform film formation through solution processing rather than direct vacuum deposition

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If existing polymer compounds are used in organic light-emitting elements, then the layer can be formed by coating method, but there is room for improvement in driving voltage, luminous efficiency and maximum attainable brightness

Engineering Contradiction:

Improvecoating methodVSAvoiddriving voltage and luminous efficiency

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The invention creates a composite polymer compound incorporating multiple functional moieties (electron transport, hole transport, and phosphorescent units) within a single polymer structure, achieving synergistic effects that improve electrical and optical properties while maintaining ease of manufacture

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The polymer compound is designed to perform multiple functions simultaneously: electron transport, hole transport, and phosphorescent emission, eliminating the need for separate layers and improving overall device performance while maintaining simple coating-based manufacturing

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 solution results in an organic light-emitting element with low driving voltage and high luminous efficiency, achieving improved brightness and efficiency in light emission.

Implementation Method 1

a polymer compound comprising a constitutional unit derived from an electron transport polymerizable compound represented by formula (1) and a constitutional unit derived from a phosphorescent polymerizable compound

Methodology Applied

Scientific EffectPhosphorescence: Phosphorescence

Implementation Method 2

an organic light-emitting element constituted by arranging a light-emitting layer (4) between an anode (2) and a cathode (6)

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentEP2172989B1Organic light-emitting device using triazine ring-containing polymer compound

Publication Date: 2014.06.25 SAMSUNG ELECTRONICS CO LTD

Figure 1

AI summary

The organic light-emitting element of the present invention is an organic light-emitting element constituted by arranging a light-emitting layer between an anode and a cathode, and is characterized in that the light-emitting layer contains a polymer compound comprising a constitutional unit derived from an electron transport polymerizable compound represented by the following formula (1) and a constitutional unit derived from a phosphorescent polymerizable compound; wherein R1 to R14 are each independently a hydrogen atom, a halogen atom, a cyano group, an amino group, an alkyl group of 1 to 12 carbon atoms or the like, R15 is a hydrogen atom or an alkyl group of 1 to 12 carbon atoms, and X1 is a single bond or the like.