Organic Electronic Element Light Efficiency Improving Layer
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Solution Overview
Problem
Current organic electronic elements face challenges in achieving high luminous efficiency, low driving voltage, improved color purity, and long lifetime due to issues such as metal oxide penetration, Joule heat sensitivity, and intermolecular interactions leading to reduced efficiency and color purity.
Innovation Solution
An organic electronic element incorporating a light efficiency improving layer with a compound represented by Chemical Formula 1, which can be used as a capping layer or in organic layers, enhances light efficiency by amplifying the wavelength of light through surface plasma resonance, thereby improving color purity and extending the element's lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single material is used as a light emitting material, then the device structure is simple, but the color purity deteriorates and luminous efficiency decreases due to intermolecular interactions
Solution Approach 1:
The patent employs a host/dopant composite material system where a host material and dopant material are combined in specific ratios. The dopant material (e.g., iridium complexes, phosphorescent dyes) is dispersed in the host material matrix, creating a composite light emitting layer that achieves both high color purity and luminous efficiency while avoiding the drawbacks of single-material systems
2Reliability
If metal oxide is used in the anode, then the anode具有良好的 hole injection performance, but metal oxide penetrates and diffuses into the organic layer reducing element lifetime
Solution Approach 1:
The patent introduces an interface layer or barrier layer between the metal oxide anode and the organic layer. This intermediary layer prevents metal oxide penetration and diffusion into the organic layer while maintaining good hole injection performance, thereby extending element lifetime without sacrificing electrical performance
3Ease of manufacture
If the glass transition temperature of hole transport layer material is low, then the material is easy to process, but the surface uniformity breaks during operation reducing lifetime
Solution Approach 1:
The patent selects hole transport layer materials with optimized glass transition temperatures that balance processability and operational stability. By carefully controlling the Tg parameter within a specific range, the material remains sufficiently soft for processing but maintains surface uniformity during operation, preventing the breakdown that would reduce element lifetime
4Reliability
If the organic layer is made multilayer with different materials, then the efficiency and stability improve, but the device complexity increases
Solution Approach 1:
The patent divides the organic layer into multiple functional sub-layers including hole injection layer, hole transport layer, light emitting layer, electron transport layer, and electron injection layer. Each sub-layer is optimized with specific materials for its particular function, achieving high efficiency and stability through functional segmentation while maintaining manageable device 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 use of the compound significantly improves luminous efficiency, reduces driving voltage, and enhances color purity and lifetime of the organic electronic element by minimizing light energy loss and optimizing the optical thickness between electrodes.
Implementation Method 1
enhances light efficiency by amplifying the wavelength of light through surface plasma resonance
Data Source
AI summary
An organic electronic element includes a first electrode, a second electrode, one or more organic layers formed between the first electrode and the second electrode, and a light efficiency improving layer formed on at least one of an upper side and a lower side of the first electrode and the second electrode, opposite to the side on which the organic layers are formed, wherein the light efficiency improving layer includes a compound represented by Chemical Formula 1. An electronic device includes a display device including the organic electronic element and a controller for driving the display device.