OLED Light-Emitting Layer Composition for Lower Voltage and Longer Life
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Solution Overview
Problem
There is a need for an organic light emitting device with improved driving voltage, efficiency, and lifetime.
Innovation Solution
The device incorporates a light emitting layer comprising a first compound of Chemical Formula 1 and a second compound of Chemical Formula 2, where the compounds are specifically structured to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic light emitting devices use standard organic material layers, then the device structure is simple and easy to manufacture, but the driving voltage, efficiency and lifetime are insufficient
Solution Approach 1:
The patent employs composite materials by combining a first organic compound and a second organic compound in the light emitting layer. Each compound has specific structural characteristics that complement each other, creating a synergistic effect that improves device lifetime and efficiency while maintaining manageable structural complexity.
Solution Approach 2:
The patent applies local quality by designing compounds with specific functional groups and molecular structures at different positions within the light emitting layer. The first compound contains specific substituents (Ar1-Ar6, R1-R6) that provide localized electron transport properties, while the second compound provides hole transport properties, creating optimized local environments for charge carrier movement.
2Power
If conventional organic light emitting devices use standard organic materials, then the manufacturing process is simple, but the driving voltage and efficiency are insufficient
Solution Approach 1:
The patent utilizes parameter changes by carefully selecting and optimizing the molecular weight, HOMO-LUMO energy levels, and structural parameters of the organic compounds. The first compound has specific energy level parameters that facilitate electron injection, while the second compound has complementary parameters for hole injection, collectively optimizing driving voltage without complicating manufacturing.
3Productivity
If conventional organic light emitting devices use standard organic materials, then the device structure is straightforward, but the luminous efficiency is insufficient
Solution Approach 1:
The patent employs intermediary compounds that facilitate efficient energy and charge transfer between the electrodes and the light emitting active species. The first and second compounds act as intermediary materials that mediate charge carrier transport and energy transfer processes, improving luminous efficiency while maintaining a relatively simple overall device structure.
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 device achieves improved driving voltage, efficiency, and lifetime through the use of these compounds in the light emitting layer.
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
A mixture for an organic light emitting device, comprising of a first compound of Chemical Formula 1 and a second compound of Chemical Formula 2:A is a benzene ring fused with the two pentagonal rings; Ar1 to Ar3 are each independently a substituted or unsubstituted C6-60 aryl or C5-60 heteroaryl containing one or more of N, O and S; provided that at least one of Ar1-Ar3, and R1 is substituted with at least one deuterium, or at least one of R1 is deuterium, and the first compound comprises at least 5 deuteriums;B is a benzene ring fused with the two pentagonal rings; Ar4 is a substituted or unsubstituted C6-60 aryl; and Ar5 is a substituted or unsubstituted C6-60 aryl or C5-60 heteroaryl containing one of N, O and S, and the other substituents are as defined in the specification.