Polyfluorinated Ligand OLED Emitters for Red Near-IR Yield
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Solution Overview
Problem
Current organic light emitting diodes (OLEDs) face challenges in achieving high phosphorescent quantum yield, particularly in the red to near IR emission region, which limits their performance and efficiency.
Innovation Solution
The use of transition metal compounds with polyfluorinated ligands, specifically a compound comprising a ligand coordinated to a metal, which enhances phosphorescent quantum yield when integrated into OLEDs, particularly in the red to near IR emission region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic materials are used in OLEDs, then device flexibility and cost advantages are achieved, but phosphorescent quantum yield is insufficient particularly in red to near IR emission region
Solution Approach 1:
The patent modifies the chemical structure of organic ligands by introducing polyfluorinated groups and specific heterocyclic moieties (Formula I structure with N-containing rings). This structural parameter change in the emitter materials enables high phosphorescent quantum yield in the red to near IR region while maintaining compatibility with conventional OLED fabrication processes
Solution Approach 2:
The invention creates composite emitter materials combining transition metal centers (Ir, Pt, Os) with specifically designed polyfluorinated organic ligands. This composite approach leverages the heavy atom effect of transition metals for phosphorescence while the polyfluorinated ligands provide structural stability and tune the emission wavelength to red/near IR region with high quantum yield
2Productivity
If transition metal compounds are used to improve phosphorescent quantum yield, then emission efficiency in red to near IR region is enhanced, but device complexity increases
Solution Approach 1:
The patent introduces polyfluorinated groups at specific positions on the ligand framework (Formula I structure with substituted R groups). This local modification approach enhances phosphorescent quantum yield and tunes emission to red/near IR region without requiring complete redesign of the entire molecular structure, thus limiting the increase in device complexity
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 integration of these transition metal compounds with polyfluorinated ligands significantly improves the phosphorescent quantum yield in OLEDs, enhancing their performance and efficiency in the red to near IR emission region.
Implementation Method 1
transition metal compounds with polyfluorinated ligands that exhibit enhanced phosphorescent quantum yield when used in OLEDs
Data Source
AI summary
Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.