Amine Compound Layers for OLED Efficiency and Service Life
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Solution Overview
Problem
Existing organic electroluminescence displays face challenges in achieving low driving voltage, high luminous efficiency, and long service life, necessitating improved materials for light emitting devices.
Innovation Solution
Incorporation of an amine compound represented by specific chemical structures (Formulas 1 and 2) in the functional layers of the light emitting device, including a hole transport region and electron transport region, to enhance hole transport characteristics and electron recombination probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional materials are used in light emitting devices, then device structure and existing material compatibility are maintained, but luminous efficiency and service life are insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of hole transport materials by introducing specific substituent groups (fluorine atoms, methyl groups, deuterium atoms) and varying structural parameters (a1-a6, a11, n1, n2) to optimize both luminous efficiency and service life simultaneously
Solution Approach 2:
The invention creates composite material systems by combining the developed amine compound with other functional materials in multiple layers (hole injection layer, hole transport layer, electron blocking layer, emission layer, electron transport layer) to achieve synergistic effects that improve both efficiency and reliability
2Use of energy by moving object
If driving voltage is reduced for lower power consumption, then energy efficiency improves, but maintaining high luminous efficiency and long service life becomes difficult
Solution Approach 1:
The patent optimizes the energy level parameters of the amine compound (HOMO/LUMO levels, electron mobility, hole mobility) to enable low driving voltage operation while maintaining high luminous efficiency through improved charge transport and recombination characteristics
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 amine compound improves luminous efficiency and extends the service life of the light emitting device by optimizing hole transport and electron recombination processes.
Implementation Method 1
the amine compound improves luminous efficiency and extends the service life of the light emitting device by optimizing hole transport and electron recombination processes
Implementation Method 2
the amine compound improves luminous efficiency and extends the service life of the light emitting device by optimizing hole transport and electron recombination processes
Implementation Method 3
holes and electrons respectively injected from a first electrode and a second electrode recombine in an emission layer, and so that a luminescent material in the emission layer emits light
Data Source
AI summary
A light emitting device includes a first electrode, a second electrode disposed on the first electrode, and at least one functional layer disposed between the first electrode and the second electrode. The at least one functional layer may include an amine compound represented by Formula 1. Thus, the light emitting device may exhibit an improved luminous efficiency and a prolonged device service life.