Organic Electronic Element Host Material for Luminous Efficiency
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Solution Overview
Problem
Current organic electronic elements face challenges in achieving high luminous efficiency, color purity, and lifespan due to intermolecular interactions and sensitivity to Joule heating, particularly in large-area displays where power consumption and efficiency are critical.
Innovation Solution
A novel compound is developed, represented by Formula (1), which is used in a composition for organic electronic elements, enhancing luminous efficiency, stability, and lifespan by forming a stable and efficient organic material layer, including a host material for the emitting layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light emitting material is used, then the device structure is simple, but color purity is lowered and luminous efficiency is reduced due to intermolecular interaction and emission attenuation
Solution Approach 1:
The patent applies the host/dopant composite material system where a light emitting material is combined with a host material having a wider energy band gap. This composite structure enables high luminous efficiency through effective energy transfer from host to dopant while maintaining color purity, resolving the contradiction between structural simplicity and luminous efficiency.
2Use of energy by moving object
If efficiency is increased, then luminous output is improved, but driving voltage decreases and Joule heating increases causing crystallization and reduced lifespan
Solution Approach 1:
The patent changes the energy band gap parameter of the host material to be wider than that of the light emitting material. This parameter change enables the host to effectively transfer energy to the dopant while generating less Joule heating, thus improving luminous efficiency without compromising lifespan by preventing crystallization from excessive heat.
3Use of energy by moving object
If a host/dopant system is used to increase color purity and luminous efficiency, then energy transfer is improved, but the material layer becomes more sensitive to Joule heating and requires better heat resistance
Solution Approach 1:
The patent applies local quality by selecting a host material with specific local properties (wider energy band gap) that is inherently more resistant to Joule heating. This local quality enhancement in the host material protects the entire host/dopant system from thermal degradation while maintaining the desired energy transfer efficiency and color purity.
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 compound achieves high luminous efficiency, low driving voltage, and improved heat resistance, thereby increasing color purity and extending the lifespan of organic electronic elements.
Implementation Method 1
In general, organic light emitting phenomenon refers to a phenomenon that converts electric energy into light energy by using an organic material
Implementation Method 2
excitons generated in the emitting layer are transported to the dopant to emit light with high efficiency
Implementation Method 3
crystallization of organic materials due to Joule heating generated during driving decreases
Data Source
AI summary
Provided are a compound that can improve the luminous efficiency, stability, and lifespan of the element, an organic electronic element using the same, and an electronic device thereof.