OLED Hole Transport Amine Compounds for Efficiency and Lifespan
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Solution Overview
Problem
Existing organic electroluminescence display devices face challenges in achieving improved luminous efficiency and lifespan for their light-emitting elements.
Innovation Solution
Incorporation of a specific amine compound represented by Formula 1 in the hole transport region of the light-emitting element, which includes layers such as the hole injection layer, hole transport layer, and electron blocking layer, enhances the efficiency and lifespan of the display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials are used in the light-emitting element, then the device can operate, but the luminous efficiency and lifespan are insufficient
Solution Approach 1:
The patent introduces a specific amine compound with defined chemical structure (Formula 1) containing specific substituents (Ar1-Ar5 groups, R1-R41 atoms/groups) to change the material parameters of the hole transport region. This chemical parameter change optimizes both luminous efficiency and lifespan simultaneously by improving charge transport properties and stability.
Solution Approach 2:
The patent employs a composite approach by combining the amine compound (Formula 1) with other materials in the light-emitting element structure. The amine compound serves as a hole transport material combined with electron blocking layer and emission layer materials, creating a composite system that achieves superior efficiency and lifespan through synergistic effects.
2Ease of manufacture
If the light-emitting element structure is simplified, then manufacturing is easier, but achieving high efficiency and long lifespan becomes difficult
Solution Approach 1:
The patent applies local quality by introducing the specific amine compound (Formula 1) specifically in the hole transport region, rather than uniformly throughout the entire light-emitting element. This localized application optimizes the region responsible for charge transport, improving lifespan and efficiency without complicating the overall device structure or manufacturing process.
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 the luminous efficiency and lifespan of the light-emitting elements, resulting in better display quality.
Implementation Method 1
a hole transport region disposed between the first electrode and the emission layer, wherein the hole transport region includes an amine compound represented by Formula 1
Implementation Method 2
a so-called self-luminescent light-emitting element in which holes and electrons respectively injected from a first electrode and a second electrode recombine in an emission layer, so that a luminescent material in the emission layer emits light
Data Source
AI summary
Embodiments provide an amine compound, a light-emitting element that includes the amine compound, and a display device that includes the light-emitting element. The light-emitting element includes a first electrode, a second electrode disposed on the first electrode, an emission layer disposed between the first electrode and the second electrode, and a hole transport region disposed between the first electrode and the emission layer, wherein the hole transport region includes the amine compound. The amine compound is represented by Formula 1, which is described in the specification: