Pt/Pd OLED Emitters for Saturated RGB and White Light
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Solution Overview
Problem
Conventional OLEDs face challenges in achieving saturated red, green, and blue pixel emissions required for full color displays, and there is a need for improved organic materials that can efficiently produce white light for backlighting applications.
Innovation Solution
Development of a compound comprising a specific structure (Formula I) with Pt or Pd as M, monocyclic or polycyclic fused rings, and various substituents for use in OLEDs to enhance light emission properties, including the formation of a benzene ring with non-hydrogen substituents and specific arrangements of substituents on RA and RB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional organic materials are used in OLEDs, then the device structure can be simple and fabrication can be easier, but the ability to produce saturated red, green, and blue pixel emissions is insufficient
Solution Approach 1:
The patent modifies the molecular structure parameters of organic compounds by incorporating specific heterocyclic rings (triazole, tetrazole, imidazole, pyrazole) and adjusting substituent positions (RA, RB, RC) to optimize light emission properties. These parameter changes enable the materials to produce saturated red, green, and blue emissions while maintaining reasonable device complexity
Solution Approach 2:
The patent creates composite organic materials by combining multiple heterocyclic ring systems with various substituent groups (aryl, heteroaryl, alkyl, etc.). These composite structures achieve the desired color saturation by integrating different functional moieties that contribute to specific emission characteristics
2Manufacturing precision
If white light emission is achieved through conventional materials, then the backlighting function can be provided, but the efficiency and color accuracy are insufficient
Solution Approach 1:
The patent applies local quality by introducing specific heterocyclic ring systems at particular positions within the molecular structure. The triazole, tetrazole, imidazole, and pyrazole rings are strategically positioned to enhance electron-hole recombination efficiency and optimize the emission spectrum, thereby improving both color accuracy and emission efficiency simultaneously
Solution Approach 2:
By changing the chemical composition parameters and introducing nitrogen-containing heterocyclic rings, the patent optimizes the energy levels and emission characteristics of the organic materials. This enables more efficient energy conversion and reduced energy loss while achieving accurate white light emission
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 compound enables the production of saturated red, green, and blue pixels, as well as white light emission, improving the color accuracy and efficiency of OLEDs for display applications.
Implementation Method 1
OLEDs make use of thin organic films that emit light when voltage is applied across the device
Data Source
AI summary
Provided are organometallic compounds comprising a platinum or palladium atom as the central metal atom which is coordinated by a tetradentate ligand. Also provided are formulations comprising these organometallic compounds. Further provided are organic light emitting devices (OLEDs) as well as related consumer products that utilize these organometallic compounds.