Oligosilane Compounds for OLED Host and Emitter Materials

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Solution Overview

Problem

There is a need for novel oligosilane compounds suitable for use in OLED materials such as HTL, hosts, and emitters, as existing materials do not adequately address performance requirements for organic light-emitting diodes.

Innovation Solution

Development of compounds with specific formulas, including oligosilane structures that incorporate various chemical groups, which can be used as hosts or emitters in OLEDs, enhancing their performance and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional OLED materials are used, then device fabrication is straightforward, but performance and efficiency are insufficient

Engineering Contradiction:

ImproveOLED performanceVSAvoidmaterial structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs composite oligosilane structures combining multiple functional groups (silane cores, aromatic substituents, heteroatomic groups) to achieve superior OLED performance. These composite materials integrate charge transport, hole injection, and emitter functionalities within single molecular architectures, resolving the contradiction between performance improvement and material complexity.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent systematically varies molecular parameters including oligosilane chain length (m=0-20), substituent types (R1-R8 groups), and structural configurations to optimize OLED performance. By changing these chemical parameters, the invention achieves enhanced efficiency and performance while providing a structured approach to managing material complexity.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If existing host and emitter materials are used, then device fabrication is simple, but light emission efficiency is inadequate

Engineering Contradiction:

Improvelight emission efficiencyVSAvoidcompound structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The oligosilane compounds are segmented into distinct functional regions: silane core structures for charge transport, aromatic substituents for stability and processability, and heteroatomic groups for emissive properties. This segmentation allows optimization of light emission efficiency through targeted functional group selection while maintaining manageable structural complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent designs oligosilane compounds that perform multiple functions simultaneously: charge transport, hole injection, and light emission. This multi-functionality increases productivity by reducing the number of separate materials needed while the systematic structural framework keeps complexity manageable.

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 novel oligosilane compounds improve the performance and efficiency of OLEDs by providing effective host and emitter materials, enabling better light emission and device performance.

Implementation Method 1

OLEDs make use of thin organic films that emit light when voltage is applied across the device

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20230397489A1Organic Electroluminescent Materials and Devices

Publication Date: 2023.12.07 UNIVERSAL DISPLAY CORP

AI summary

This invention discloses oligosilane compounds. These compounds can be used in OLEDs.