Organic Light Emitting Device with Specific Compounds for Low Voltage
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Solution Overview
Problem
There is a continuous need for organic light emitting devices with improved driving voltage, efficiency, and lifetime, as existing devices face limitations in these areas.
Innovation Solution
The organic light emitting device incorporates a light emitting layer with specific compounds of Chemical Formulas 1 and 2, which enhance the device's efficiency and reduce driving voltage, comprising aryl or heteroaryl groups with specific substituents and bonds, improving the overall performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional organic light emitting devices are used, then basic light emission function is achieved, but driving voltage is high and efficiency is poor
Solution Approach 1:
The patent modifies the chemical structure parameters of the light emitting layer by introducing specific compounds with formulas (1) and (2) that contain particular functional groups and molecular configurations. These parameter changes in molecular structure lead to improved charge transport properties and reduced driving voltage while maintaining device reliability
Solution Approach 2:
The patent employs composite material strategy by combining multiple organic compounds in the light emitting layer, including host materials, guest materials, and auxiliary compounds with specific formulas. This composite approach synergistically improves both driving voltage and device efficiency through enhanced charge injection and transport mechanisms
2Productivity
If conventional organic light emitting devices are used, then basic light emission function is achieved, but efficiency is poor
Solution Approach 1:
The patent optimizes energy conversion efficiency by changing the chemical parameters of the light emitting compounds. The specific molecular structures in formulas (1) and (2) are designed to improve triplet energy levels and singlet-fission properties, which directly enhance the efficiency of converting electrical energy to light energy while reducing energy losses
Solution Approach 2:
The patent utilizes excited state phase transitions and energy level transitions in the organic compounds to improve efficiency. By designing compounds with specific energy level structures, the patent enables more efficient radiative transitions and reduces non-radiative energy losses, thereby improving overall device efficiency
3Duration of action of stationary object
If conventional organic light emitting devices are used, then basic light emission function is achieved, but lifetime is limited
Solution Approach 1:
The patent extends device lifetime by modifying the chemical stability parameters of the light emitting layer compounds. The specific molecular structures with enhanced steric hindrance, optimized HOMO-LUMO energy gaps, and improved molecular packing characteristics reduce degradation pathways and enhance operational stability, thereby extending device lifetime while maintaining reliability
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 inclusion of these compounds in the light emitting layer results in improved efficiency and extended lifetime, achieving lower driving voltage and enhanced performance characteristics.
Implementation Method 1
an 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 a light emitting layer comprising a compound of Chemical Formula 1 and a compound of Chemical Formula 2:wherein:Ar1, Ar2, Ar4 and Ar5 are each independently a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing N, O or S;Ar3 is hydrogen, or a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing N, O or S;L1 to L3 are each independently a single bond or a substituted or unsubstituted C6-60 arylene;L4 to L6 are each independently a single bond or a substituted or unsubstituted C6-60 arylene or C2-60 heteroarylene containing N, O or S;L7 is a substituted or unsubstituted C6-60 arylene;R1 is hydrogen, deuterium, or a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing one or of N, O and S;a is 0 to 7.