Light-Emitting Composition with Aromatic Rings for External Quantum Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light emitting devices using compositions with H0 and FIrpic suffer from insufficient external quantum efficiency.
Innovation Solution
A composition comprising two or more compounds represented by formula (C-1) and a phosphorescent compound, where at least one compound from formula (C-1) has specific aromatic rings and substituents, enhancing the external quantum efficiency of light emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a composition containing H0 and FIrpic is used in a light emitting device, then the device can be produced with existing materials, but the external quantum efficiency is insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of the host compounds by introducing specific aromatic ring systems (carbazole, triphenylamine, oxadiazole, triazine) and substituent groups. These structural parameter changes enhance the external quantum efficiency from insufficient levels to improved performance while maintaining reliable light emission.
Solution Approach 2:
The patent creates a composite light emitting composition by combining multiple compounds with formula (C-1) that have different structural characteristics (various aromatic rings and substituents) with phosphorescent compounds. This composite approach allows the mixture to achieve superior external quantum efficiency and light emission effectiveness that individual components cannot achieve alone.
2Reliability
If conventional compositions are used, then the device structure is simple, but the light emission effectiveness is insufficient
Solution Approach 1:
The patent applies local quality by designing compounds with specific functional regions: core aromatic ring systems (carbazole, triphenylamine, oxadiazole, triazine) that provide electron transport and hole transport capabilities, plus specific substituent groups that enhance phosphorescent emission. Each local structural element contributes a specific function, achieving high light emission effectiveness through localized structural optimization.
Solution Approach 2:
The patent systematically varies structural parameters including the types of aromatic rings (carbazole, triphenylamine, oxadiazole, triazine), the positions of substituents, and the nature of substituent groups to optimize the balance between composition complexity and light emission effectiveness. These controlled parameter changes achieve superior performance without unnecessary 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 composition significantly improves the external quantum efficiency of light emitting devices, leading to more effective light emission.
Implementation Method 1
a phosphorescent compound represented by formula (1)
Data Source
AI summary
To provide a composition which is useful for production of a light emitting device excellent in external quantum efficiency. A composition comprising two or more compounds represented by the formula (C-1) and a phosphorescent compound, wherein at least one of the above-described two or more compounds represented by the formula (C-1) is a compound represented by the formula (C-1) in which RC is a group represented by the formula (C'-1) : [wherein, Ring R1C and Ring R2C represent an aromatic hydrocarbon ring or an aromatic hetero ring. RC represents an oxygen atom, a sulfur atom or a group represented by the formula (C'-1).] [wherein, Ring R3C and Ring R4C represent an aromatic hydrocarbon ring or an aromatic hetero ring. RC' represents a carbon atom, a silicon atom, a germanium atom, a tin atom or a lead atom.].