Anthracene Emitting Compound for Blue OLED Efficiency
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Solution Overview
Problem
Organic light emitting display devices, particularly those using OLEDs, face limitations in blue pixel emitting efficiency and lifespan, which restricts the overall performance and longevity of these devices.
Innovation Solution
An emitting compound represented by Formula 1 is introduced, which is used in the emitting material layer of OLEDs, enhancing the emitting efficiency and lifespan by optimizing the chemical structure and composition to improve blue light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional emitting materials are used in blue pixels, then the device structure and operation are simple, but the emitting efficiency and lifespan are insufficient
Solution Approach 1:
The patent modifies the chemical parameters of the emitting compound by introducing specific heteroatoms (B, P=O, P=S) and controlling the substitution patterns on the anthracene core. This changes the electronic structure and energy levels of the material, resulting in improved emitting efficiency and lifespan for blue pixels while maintaining a manageable molecular structure through systematic substitution rather than complete structural redesign
Solution Approach 2:
The patent creates composite emitting compounds by combining the anthracene core structure with various aromatic and heteroaromatic substituent groups. This composite approach allows optimization of specific properties (emitting efficiency, lifespan, color purity) through careful selection and arrangement of substituent groups while maintaining the overall molecular framework
2Productivity
If conventional emitting materials are used in blue pixels, then the molecular structure is simple, but the emitting efficiency is insufficient
Solution Approach 1:
The patent applies local quality modification by introducing specific functional groups and heteroatoms at particular positions on the anthracene core. The substituents are strategically placed to optimize electron-hole recombination and exciton management locally, improving emitting efficiency without requiring complete redesign of the entire molecular structure
Solution Approach 2:
The patent optimizes emitting efficiency by changing key molecular parameters including the type of heteroatom (B, P=O, P=S), the nature of aromatic substituents, and their positions on the core structure. These parameter adjustments tune the HOMO-LUMO gap, charge carrier mobility, and exciton binding energy to achieve superior emitting efficiency
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 emitting compound in the OLEDs results in improved driving voltage, emitting efficiency, and lifespan, specifically for blue pixels, thereby enhancing the overall performance and longevity of organic light emitting display devices.
Implementation Method 1
The OLED emits light by injecting electrons from a cathode as an electron injection electrode and holes from an anode as a hole injection electrode into an emitting material layer (EML), combining the electrons with the holes, generating an exciton, and transforming the exciton from an excited state to a ground state
Data Source
AI summary
The present disclosure relates to an emitting compound and organic light emitting device including the same, more specifically, relates to an emitting compound of following and an organic light emitting diode and an organic light emitting device each including the emitting compound.