OLED Driving Voltage and Lifetime via Layered Compound Formulas
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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 comprises specific layers, including an anode, hole transport layer, electron blocking layer, light emitting layer, and electron transport layer, where the electron blocking layer, light emitting layer, and electron transport layer are composed of compounds represented by specific chemical formulas, enhancing the device's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional organic material layers are used in the organic light emitting device, then the device structure is simple, but the driving voltage is high and efficiency is low
Solution Approach 1:
The patent employs composite materials by introducing specific functional layers with carefully selected compounds. The electron blocking layer uses compounds with specific molecular structures (Formula 1) to prevent electron leakage, the light emitting layer uses compounds (Formula 2) for efficient exciton generation, and the electron transport layer uses compounds (Formula 3) for optimal electron mobility. This composite material approach resolves the contradiction by achieving both structural organization and improved electrical performance.
Solution Approach 2:
The patent applies local quality by assigning different functional properties to different layers. Each layer is optimized with specific compounds that have tailored molecular structures for their particular functions: the electron blocking layer prevents electron injection from the cathode, the light emitting layer generates excitons efficiently, and the electron transport layer facilitates electron mobility. This localized optimization resolves the contradiction between structural simplicity and functional performance.
2Ease of manufacture
If conventional organic material layers are used in the organic light emitting device, then the device is easy to manufacture, but the lifetime is short
Solution Approach 1:
The patent uses composite materials with specific molecular structures in each layer to enhance device lifetime. The electron blocking layer compounds (Formula 1) prevent degradation from electron injection, the light emitting layer compounds (Formula 2) ensure stable exciton formation, and the electron transport layer compounds (Formula 3) maintain consistent electron flow. This composite approach extends device lifetime while preserving manufacturing feasibility through established vacuum deposition techniques.
Solution Approach 2:
The patent changes key material parameters by selecting compounds with specific molecular structures and properties for each layer. The electron blocking layer uses compounds with appropriate HOMO/LUMO energy levels to prevent electron injection, the light emitting layer uses compounds with high quantum efficiency for exciton generation, and the electron transport layer uses compounds with optimal electron mobility. These parameter optimizations extend device lifetime without complicating the manufacturing process.
3Loss of energy
If specific chemical formula compounds are used in the electron blocking layer, light emitting layer, and electron transport layer, then driving voltage and efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by optimizing specific compounds for each layer's function. The electron blocking layer uses compounds (Formula 1) with structures designed to block electrons while allowing holes to pass, the light emitting layer uses compounds (Formula 2) optimized for exciton generation, and the electron transport layer uses compounds (Formula 3) optimized for electron mobility. This localized functional optimization improves driving voltage and efficiency without requiring complex overall device architecture.
4Loss of energy
If optimized material layers are used in the organic light emitting device, then efficiency and lifetime are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent employs composite materials that can be deposited using standard vacuum deposition techniques. Each layer (electron blocking, light emitting, electron transport) uses compounds with specific molecular structures that are compatible with existing manufacturing processes. This approach achieves improved efficiency and lifetime through material optimization while maintaining compatibility with conventional manufacturing methods.
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 described configuration results in an organic light emitting device with excellent driving voltage, efficiency, and extended lifetime, as demonstrated by the manufacturing examples and comparative results.
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
The present disclosure relates to an organic light emitting device having improved driving voltage, efficiency and lifetime.