Condensed Cyclic Compound for OLED Electron Transport
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Solution Overview
Problem
Current organic light-emitting devices face limitations in electron transport characteristics and luminescent efficiency due to the lack of effective materials that enhance π-electron density and exciton formation.
Innovation Solution
A novel condensed cyclic compound represented by Formulae 1-1 and 1-2 is introduced, which includes specific structural elements that improve electron transport and luminescent efficiency by enriching π-electron density, thereby enhancing the performance of organic light-emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic light-emitting device materials are used, then device structure is simple, but electron transport characteristics are insufficient and luminescent efficiency is low
Solution Approach 1:
The patent modifies molecular parameters by introducing specific structural elements (X1 and X2 heteroatoms, L11-L13 and L21-L23 linkers) into the condensed cyclic compound framework, changing the electronic properties to enhance electron transport and luminescent efficiency while maintaining reasonable structural complexity
Solution Approach 2:
The patent creates composite molecular structures by combining multiple functional units (condensed cyclic cores with various linker groups and substituent patterns) into a single compound that simultaneously provides both electron transport and luminescent properties
2Reliability
If conventional organic light-emitting device materials are used, then manufacturing process is simple, but luminescent efficiency is low
Solution Approach 1:
The patent changes molecular parameters by incorporating heteroatoms (O or S) and specific linker groups into the condensed cyclic compound structure, which modifies the HOMO-LUMO energy levels and exciton formation characteristics to improve luminescent efficiency
Solution Approach 2:
The patent applies local quality by introducing specific functional groups (X1-X2 heteroatom pairs, L11-L13/L21-L23 linkers) at specific positions within the molecular structure to create localized regions of high electron density that enhance exciton formation and luminescence
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 condensed cyclic compound in organic light-emitting devices improves electron transport characteristics and increases luminescent efficiency, leading to higher efficiency and longer lifespan of the devices.
Implementation Method 1
the lack of effective materials that enhance π-electron density and exciton formation
Implementation Method 2
Carriers (e.g., holes and electrons) are then recombined in the emission layer to produce excitons. These excitons change from an excited state to a ground state, thereby generating light
Data Source
AI summary
An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer; a hole transport region between the first electrode and the emission layer; and an electron transport region between the emission layer and the second electrode. At least one of the emission layer and the electron transport region includes a condensed cyclic compound represented by one selected from Formulae 1-1 and 1-2:The organic light-emitting device including one or more of the condensed cyclic compounds according to embodiments of the present disclosure may have low driving voltage, high efficiency, high luminance, and long lifespan.