Polycyclic Dopant and Deuterated Anthracene Host for Long-Life OLEDs

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing organic electroluminescent devices face challenges in achieving high efficiency and long lifetime due to suboptimal structural designs and materials in their organic layers, particularly in the light emitting layer where the combination of energy band gaps of host and dopant materials is not adequately addressed.

Innovation Solution

The use of a polycyclic compound with a boron-containing moiety and an anthracene derivative containing deuterium atoms as a dopant and host in the light emitting layer, respectively, to facilitate efficient exciton formation and enhance device performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional organic layer materials and structures are used, then device fabrication is simpler, but luminous efficiency and device lifetime are insufficient

Engineering Contradiction:

Improveluminous efficiencyVSAvoidorganic layer structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent modifies the chemical structure of organic compounds by introducing deuterium atoms at specific positions in the anthracene core and optimizing substituent groups. This parameter change at the molecular level enhances the energy band gap matching between host and dopant, thereby improving luminous efficiency without significantly complicating the overall device structure

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material systems where deuterated anthracene derivatives serve as host materials combined with specific dopant compounds. This composite approach creates optimized energy transfer pathways and improves both luminous efficiency and device stability while maintaining manageable structural complexity

Inventive Principle:

Principle #40Composite materials

2Productivity

If conventional host and dopant combinations are used, then material selection is easier, but exciton formation efficiency is insufficient

Engineering Contradiction:

Improveexciton formation efficiencyVSAvoidenergy band gap matching complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent systematically adjusts the energy band gap parameters of host and dopant materials by modifying molecular structures. Deuterium substitution and strategic placement of electron-donating or electron-withdrawing groups enable precise control over HOMO-LUMO energy levels, optimizing exciton formation efficiency through better energy matching

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent divides the light-emitting layer into distinct functional components with specific roles: the deuterated anthracene derivative serves as the host matrix while separate dopant molecules provide the emission function. This segmentation allows independent optimization of each component's energy levels to achieve optimal exciton formation

Inventive Principle:

Principle #1Segmentation

3Duration of action of stationary object

If standard organic electroluminescent materials are used, then device fabrication is more straightforward, but device lifetime is limited

Engineering Contradiction:

Improvedevice lifetimeVSAvoidmaterial structure complexity

Core Design Contradiction:

Duration of action of stationary objectVSDevice complexity

Solution Approach 1:

The patent introduces deuterium atoms into the anthracene molecular structure, which increases the C-D bond strength compared to C-H bonds. This parameter change at the molecular level enhances material stability and resistance to degradation, thereby extending device lifetime without requiring complex device architectures

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses stable, well-established anthracene derivative frameworks that provide long-term operational stability. The deuterated structures offer enhanced durability compared to conventional organic materials, achieving extended device lifetime while maintaining compatibility with standard fabrication processes

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

This approach results in a highly efficient and long-lasting organic electroluminescent device with improved luminous efficiency and extended lifespan.

Implementation Method 1

electrons injected from an electron injecting electrode (cathode) recombine with holes injected from a hole injecting electrode (anode) in a light emitting layer to form excitons, which emit light while releasing energy

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12528830B2Polycyclic compound and organic electroluminescent device using the same

Publication Date: 2026.01.20 SFC CO LTD

AI summary

Disclosed is a polycyclic compound that can be employed in various organic layers of an organic electroluminescent device. The polycyclic compound has a characteristic skeleton structure and characteristic substituents. Also disclosed is an organic electroluminescent device including the polycyclic compound. The organic electroluminescent device includes a light emitting layer employing the polycyclic compound as a dopant and an anthracene derivative having a characteristic structure as a host. The use of the polycyclic compound significantly improves the luminous efficiency and life characteristics of the organic electroluminescent device and makes the organic electroluminescent device highly efficient and long lasting.