Heterocyclic Compound for OLED Driving Voltage Reduction
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Solution Overview
Problem
There is a need for new materials in organic light emitting devices to enhance efficiency, reduce driving voltage, and improve lifetime characteristics.
Innovation Solution
A novel heterocyclic compound, as defined by Chemical Formula 1, is used in the organic material layers of the device, which includes specific aryl or heteroaryl groups and can be incorporated into various layers such as the light emitting layer, hole injection layer, or electron transport layer, improving device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional organic materials are used in organic light emitting devices, then the device structure is simple, but the efficiency is low and lifetime characteristics are poor
Solution Approach 1:
The patent employs composite organic materials comprising specific heterocyclic compounds (containing Y1, Ar1, L, R1-R3 groups) combined with conventional organic materials. This composite approach allows the heterocyclic compound to enhance efficiency and lifetime characteristics while the conventional materials maintain structural simplicity and process compatibility.
Solution Approach 2:
The invention modifies the chemical structure parameters of organic materials by introducing heterocyclic moieties with specific functional groups (Y1 = O or S, various aryl and heteroaryl groups). These parameter changes in molecular structure directly improve device efficiency and lifetime without fundamentally altering the device architecture.
2Use of energy by stationary object
If conventional organic materials are used, then manufacturing is easy, but driving voltage is high
Solution Approach 1:
The heterocyclic compound introduces specific molecular parameters (electron affinity, hole mobility, LUMO/HOMO levels) that optimize charge transport and reduce driving voltage. The structural parameters (Y1, Ar1, L groups) are tuned to achieve lower operating voltages while maintaining ease of deposition through conventional vacuum evaporation or solution processing.
3Productivity
If new heterocyclic compounds are introduced to improve efficiency, then device performance improves, but material complexity increases
Solution Approach 1:
The patent creates composite materials where the heterocyclic compound (providing enhanced efficiency) is combined with conventional organic materials (maintaining simplicity). This allows performance improvement without requiring complete redesign of the material system.
Solution Approach 2:
The heterocyclic compound is designed with multiple functional groups (Y1, Ar1, L, R1-R3) that can perform multiple functions simultaneously: charge transport, exciton management, and structural stability. This multi-functionality reduces the need for additional separate materials, thereby limiting the increase in overall material complexity.
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 enhances the efficiency and reduces the driving voltage of organic light emitting devices while improving their lifetime characteristics, as demonstrated in experimental examples compared to comparative devices.
Implementation Method 1
an organic light emitting phenomenon refers to one where electrical energy is converted into light energy by using an organic material
Data Source
AI summary
Provided is a heterocyclic compound of Chemical Formula 1:wherein:Y1 is O or S;Ar1 is a substituted C6-60 aryl; or a substituted or unsubstituted C1-60 heteroaryl containing one or more heteroatoms selected from among O, N, Si, and S;L is a single bond; a substituted or unsubstituted C6-60 arylene; or a substituted or unsubstituted C1-60 heteroarylene containing one or more heteroatoms selected from among O, N, Si, and S;R1 to R3 are each independently hydrogen; deuterium; a halogen; cyano; nitro; amino; a substituted or unsubstituted C1-60 alkyl; a substituted or unsubstituted C1-60 haloalkyl; or a substituted or unsubstituted: C1-60 alkoxy, C1-60 haloalkoxy, C3-60 cycloalkyl, C2-60 alkenyl, C6-60 aryl, C6-60 aryloxy, or C1-60 heteroaryl containing one or more heteroatoms selected from among N, O, and S, andn1 to n3 are each independently 1 to 5,and an organic light emitting device including the same.