Silicon-Core Organic Compound for OLED Stability and Efficiency
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Solution Overview
Problem
Current organic light emitting devices face challenges in achieving high efficiency, low voltage operation, and long lifetime due to the lack of stable and efficient materials for their organic material layers, particularly in terms of morphological stability and color gamut.
Innovation Solution
A compound with a silicon atom in its core structure, as described by Chemical Formula 1, is used in the organic material layers of the device, enhancing molecular rigidity and stability, and when incorporated into the light emitting layer, it enables the production of organic light emitting devices with high efficiency, low voltage, and improved color gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional organic materials are used in the organic material layer, then the device structure is simpler, but the morphological stability and lifetime are insufficient
Solution Approach 1:
The patent employs composite materials by combining silicon-containing compounds with specific molecular structures (including heterocyclic groups, aromatic rings, and silicon atoms bonded to organic groups) to create an organic material layer that achieves superior morphological stability. This composite approach integrates multiple functional groups and elements to resolve the contradiction between stability and structural complexity.
Solution Approach 2:
The patent changes the chemical and physical parameters of the organic material by introducing silicon atoms with specific bonding configurations (Si bonded to C, H, or other organic groups) and adjusting molecular weight, rigidity, and functional group composition. These parameter changes enhance morphological stability while controlling the degree of structural complexity.
2Productivity
If conventional materials are used, then the manufacturing process is simpler, but the device efficiency and color gamut are insufficient
Solution Approach 1:
The patent optimizes efficiency by changing material parameters including silicon atom configuration, aromatic ring substitution patterns, and molecular weight ranges. These parameter adjustments enhance charge carrier mobility, exciton management, and light emission properties, thereby improving device efficiency while managing synthesis complexity.
Solution Approach 2:
The patent applies local quality by introducing specific functional groups at particular positions within the molecular structure (e.g., silicon-containing groups at core positions, aromatic substituents at peripheral positions) to optimize local electronic properties and charge transport pathways, thereby enhancing overall device efficiency.
3Duration of action of stationary object
If conventional organic materials are used, then the device operation is simpler, but the voltage and lifetime performance are insufficient
Solution Approach 1:
The patent extends device lifetime by changing operational parameters through material selection, specifically adjusting HOMO-LUMO energy levels, ionization potentials, and electron affinity values of the silicon-containing organic compounds. These parameter changes enable lower operating voltages and improved device stability over time, enhancing lifetime performance.
Solution Approach 2:
The patent implements beforehand cushioning by selecting materials with high chemical stability, oxidation resistance, and moisture tolerance in advance. The silicon-containing organic compounds are designed with protective molecular structures that preemptively resist degradation from environmental factors and operational stress, thereby extending device lifetime.
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 silicon-containing compound results in organic light emitting devices with enhanced morphological stability, high efficiency, low voltage operation, and improved color gamut, leading to devices with extended lifetime and superior performance.
Implementation Method 1
By the compound of Chemical Formula 1 of the present disclosure including a silicon atom (Si) in a core structure of the compound, molecular rigidity increases and, as a result, excellent morphological stability is obtained
Implementation Method 2
An organic light emission phenomenon generally refers to a phenomenon converting electrical energy to light energy using an organic material
Implementation Method 3
light with high efficiency is produced when mixing a small amount of dopant having a smaller energy band gap and superior light emission efficiency compared to a host mainly consisting a light emitting layer into the light emitting layer by the transferring of excitons produced in the host to the dopant
Data Source
AI summary
A compound of Chemical Formula 1, and an organic light emitting device including the same