OLED Emitter Compound with Nitrogen-Oxygen Substituents
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Solution Overview
Problem
Current organic light emitting diodes (OLEDs) face challenges in achieving low driving voltage, improved emitting efficiency, and extended lifespan, particularly in the efficiency of exciton generation and energy transfer in the host and dopant materials used in the emitting layer.
Innovation Solution
An organic compound represented by Formula 1, where one of X and Y is nitrogen (N) and the other is oxygen (O) or sulfur (S), is integrated into the emitting material layer of OLEDs, enhancing exciton generation efficiency and energy transfer, thereby improving emitting efficiency and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional host and dopant materials are used in OLED emitting layers, then device structure is simple, but emitting efficiency is low and lifespan is short
Solution Approach 1:
The patent modifies the chemical structure parameters of the host material by introducing specific substituents (R1-R6, Ar1-Ar4) with defined molecular weights and chemical properties. These parameter changes in molecular structure optimize exciton generation and energy transfer efficiency, thereby improving both emitting efficiency and device lifespan simultaneously
Solution Approach 2:
The patent creates a composite emitting layer system combining a specifically designed host material (Formula 1) with dopant materials. This composite approach leverages the complementary properties of both materials to enhance exciton utilization and energy transfer, resolving the contradiction between simplicity and performance
2Productivity
If conventional host and dopant materials are used in OLED emitting layers, then manufacturing process is simple, but exciton generation and energy transfer efficiency are low
Solution Approach 1:
The patent optimizes molecular parameters of the host material including substituent types (alkyl, aryl, heteroaryl groups) and their arrangements to enhance exciton generation efficiency. The structured approach to molecular design maintains manufacturability while significantly improving productivity metrics
3Productivity
If higher driving voltage is applied to improve exciton generation, then emitting efficiency increases, but power consumption increases
Solution Approach 1:
The patent changes the energy level parameters of the host and dopant materials through molecular structure optimization. By adjusting HOMO-LUMO gaps and energy transfer barriers, the system achieves high emitting efficiency at lower driving voltages, reducing power consumption while maintaining productivity
Solution Approach 2:
The patent replaces the mechanical approach of increasing voltage to drive exciton generation with a chemical optimization approach. By improving the intrinsic efficiency of exciton generation and energy transfer through molecular design, the system achieves the same productivity with lower energy input
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 use of the organic compound in the OLEDs results in decreased driving voltage, increased emitting efficiency, and extended lifespan by optimizing exciton generation and energy transfer processes.
Implementation Method 1
When electrons from the cathode and holes from the anode enter into the organic light emitting layer, the electrons and holes are combined to generate an exciton, and the exciton is transformed from an excited state to a ground state. As a result, the light is emitted from the OLED.
Implementation Method 2
an exciton generated in the host is transferred into the dopant so that the light is emitted from the dopant
Data Source
AI summary
The present disclosure relates to an organic compound and an organic light emitting diode and an organic light emitting device each including the same, and more specifically, relates to an emitting compound of following and an organic light emitting diode and an organic light emitting device each including the organometallic compound.