Organic Light Emitting Device Using Heteroaryl Compounds for Low Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a continuous need for organic light-emitting devices with improved driving voltage, efficiency, and lifetime in the field of organic light-emitting technology.
Innovation Solution
The organic light-emitting device incorporates a light emitting layer comprising specific compounds represented by Chemical Formulas 1 and 2, which enhance the efficiency and longevity by optimizing the interaction of holes and electrons, thereby reducing driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional organic light emitting devices are used, then the basic light emission function is achieved, but the driving voltage is high and efficiency is low
Solution Approach 1:
The patent changes the chemical composition parameters of the light emitting layer by using specific compounds (Formula 1 and Formula 2) with defined molecular structures containing heteroaryl groups and specific substituents. This chemical parameter change optimizes the energy levels and charge transport properties, resulting in lower driving voltage and higher efficiency simultaneously.
Solution Approach 2:
The patent employs composite material design by combining compounds of Formula 1 and Formula 2 in the light emitting layer. These compounds work synergistically to improve charge injection, transport, and recombination efficiency, achieving both low driving voltage and high device efficiency through material composition optimization.
2Duration of action of stationary object
If conventional organic light emitting devices are used, then the basic light emission function is achieved, but the lifetime is short
Solution Approach 1:
The patent modifies the molecular structure parameters of the light emitting materials by incorporating stable heteroaryl groups and specific substituent patterns in Formulas 1 and 2. These structural parameter changes enhance the chemical stability and resistance to degradation, thereby extending device lifetime and improving reliability.
Solution Approach 2:
The patent replaces conventional short-living organic light emitting materials with newly synthesized compounds of Formula 1 and Formula 2 that have enhanced molecular stability. These new materials resist degradation from oxygen, moisture, and operational stress, providing long-term device reliability and extended lifetime.
3Productivity
If conventional organic light emitting devices are used, then the basic light emission function is achieved, but the efficiency is low
Solution Approach 1:
The patent optimizes energy utilization by changing the HOMO-LUMO energy gap parameters and charge transport characteristics through the molecular structures in Formulas 1 and 2. This parameter optimization enables more efficient charge recombination and light emission, improving efficiency while maintaining acceptable driving voltage levels.
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 use of these compounds in the light emitting layer improves the efficiency and extends the lifetime of the organic light-emitting device while lowering the driving voltage, addressing the existing limitations in the field.
Implementation Method 1
The organic light emitting phenomenon refers to a phenomenon where electric energy is converted into light energy by using an organic material
Data Source
AI summary
Provided is an organic light emitting device comprising an anode; a cathode; and a light emitting layer therebetween, the light emitting layer comprising a compound of Chemical Formula 1 and a compound of Chemical Formula 2, the device having improved driving voltage, efficiency and lifetime:wherein: any one of R′1 to R′12 is Chemical Formula 3, and the rest are hydrogen or deuterium:Ar1, Ar2, Ar′1, and Ar′2 are each independently a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing any one or more of N, O and S; R1 is hydrogen, deuterium, or a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing any one or more of N, O and S; and the other substituents are as defined in the specification.