Aryl-Heterocyclic OLED Compounds for Long-Life, Low-Voltage Devices
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Solution Overview
Problem
Existing organic electroluminescent devices (OLEDs) require materials that enhance electron and hole transport, as well as improve recombination efficiency to extend device lifetime and reduce driving voltage.
Innovation Solution
A compound represented by a specific formula is introduced, which includes aryl and heterocyclic groups, enhancing electron and hole transport, and improving recombination efficiency in the organic electroluminescent device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional organic EL materials are used, then the device can operate, but the lifetime is limited and efficiency is insufficient
Solution Approach 1:
The patent modifies the molecular structure of organic EL materials by changing chemical parameters - specifically introducing formula (1) compounds with particular aryl and heterocyclic group combinations. This structural parameter change optimizes electron and hole transport properties, leading to extended device lifetime and improved reliability without compromising operational capability.
Solution Approach 2:
The invention employs composite material design by combining different functional groups (aryl groups and heterocyclic groups) within a single molecular framework. This composite approach creates materials that simultaneously exhibit enhanced electron transport, hole transport, and recombination efficiency, resolving the contradiction between lifetime and reliability.
2Productivity
If materials with high recombination efficiency are used, then device efficiency improves, but driving voltage increases
Solution Approach 1:
The patent applies local quality optimization by designing molecules with specific functional regions - certain aryl groups optimized for electron transport while other heterocyclic groups are optimized for hole transport and recombination. This localized functional differentiation allows high recombination efficiency to be achieved without requiring high driving voltage, as each region performs its specialized function efficiently.
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 improves the performance of OLEDs by extending lifetime, enhancing efficiency, and reducing driving voltage.
Implementation Method 1
development of a material that efficiently transports electrons or holes into the light emitting region
Implementation Method 2
development of a material that efficiently transports electrons or holes into the light emitting region
Implementation Method 3
the injected electrons and holes are recombined in the light emitting region to generate an excited state
Implementation Method 4
which then returns to the ground state to emit light
Data Source
AI summary
A compound that further improves the capability of an organic electroluminescent device, an organic electroluminescent device having a further improved device capability and an electronic device including the organic electroluminescent device are provided. A compound represented by the following formula (1):wherein the symbols in the formula (1) are defined in the description, an organic electroluminescent device including the compound, and an electronic device including the organic electroluminescent device.