Amine Compound Hole Transport Layer for OLED Driving Voltage and Lifetime
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic electroluminescence display devices face challenges in achieving reduced driving voltage and improved emission efficiency while maintaining a long lifetime, particularly in the development of materials for the hole transport region with excellent stability.
Innovation Solution
A light emitting element incorporating an amine compound, represented by specific chemical formulas, is used in the hole transport region, which includes a first electrode, a second electrode, and at least one functional layer, enhancing the element's lifetime and emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hole transport materials are used in organic electroluminescence display devices, then the device can operate, but the driving voltage remains high and the lifetime is limited
Solution Approach 1:
The patent modifies the molecular structure of hole transport materials by introducing specific amine compound structures with particular substituent groups and molecular weights, thereby changing the physical and chemical parameters of the material to achieve both low driving voltage and long lifetime
Solution Approach 2:
The patent employs composite hole transport layers combining multiple materials including the specific amine compound, host materials, and dopants to achieve synergistic effects that simultaneously reduce driving voltage and extend device lifetime
2Productivity
If conventional hole transport materials are used, then the device structure can be maintained, but emission efficiency is insufficient
Solution Approach 1:
The patent introduces specific amine compounds with particular functional groups and molecular structures at specific positions within the hole transport region to locally enhance charge transport and recombination efficiency, thereby improving overall emission efficiency without requiring complete structural redesign
Solution Approach 2:
The patent uses the specific amine compound to pre-establish optimal charge distribution and energy level alignment in the hole transport layer before charge injection, facilitating efficient charge transport and recombination from the outset
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 electrical stability and charge transport capacity of the light emitting element, leading to increased efficiency and extended lifetime, particularly in the blue emission region.
Implementation Method 1
The amine compound improves the electrical stability and charge transport capacity of the light emitting element
Implementation Method 2
a light emitting material in the emission layer emits light to achieve display
Data Source
AI summary
A light emitting element and an amine compound for a light emitting element is provided. The light emitting element includes a first electrode, a second electrode on the first electrode, and at least one functional layer (e.g., hole transport layer) between the first electrode and the second electrode. The functional layer includes a tertiary amine compound represented by a specific chemical structure (i.e., Formula 1). The tertiary amine compound is configured so that the hole transport properties of the functional layer (e.g., hole transport layer) and the emission efficiency and lifetime of the light emitting element may be enhanced or improved.