Osmium Bis(tridentate) Complexes for Near-Infrared OLED Emission

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Solution Overview

Problem

There is a need for novel osmium complexes for organic light-emitting diode (OLED) applications, as existing materials do not adequately meet performance requirements for near-infrared emission.

Innovation Solution

A series of novel osmium bis(tridentate) complexes with specific ligand structures, where Lm and Ln can be the same or different, forming a hexadentate ligand, are used in the organic layer of OLEDs to enhance emission profiles in the near-infrared region.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If conventional emissive materials are used in OLEDs, then the device can operate with standard materials, but the emission profile in the near-infrared region is insufficient

Engineering Contradiction:

Improveemission profile in near-infrared regionVSAvoidperformance requirement fulfillment

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent modifies the molecular structure parameters of osmium complexes by changing ligand configurations (Lm and Ln being the same or different tridentate ligands), which alters the emission characteristics to achieve improved near-infrared emission profiles while meeting performance requirements

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates composite osmium complexes combining specific ligand sets (Lm and Ln) to achieve enhanced emission properties in the near-infrared region, integrating multiple functional components into a single emissive material system

Inventive Principle:

Principle #40Composite materials

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

These complexes provide improved emission profiles in the near-infrared region, addressing the need for more effective osmium-based materials in OLED technology.

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

PatentUS12098157B2Organic electroluminescent materials and devices

Publication Date: 2024.09.24 UNIVERSAL DISPLAY CORP

AI summary

The present invention includes a series of novel osmium bis(tridenatate) complexes with emission profiles in the near-infrared region.