Organic Electric Element Hole Injection Layer Compound
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Solution Overview
Problem
Current organic electric elements face challenges with short lifespan, low efficiency, and instability due to metal oxide penetration and Joule heat, necessitating the development of high glass transition temperature materials for hole injection and transport layers.
Innovation Solution
A compound with a specific molecular structure is introduced, which forms the basis of an organic electric element with improved luminous efficiency, low driving voltage, and enhanced heat resistance, and is used in various layers of the organic material layer, including the hole injection, transport, and emission layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hole injection and transport materials are used, then the organic electric element can operate, but the lifespan is shortened due to metal oxide penetration and Joule heat damage
Solution Approach 1:
The patent introduces a hole injection layer comprising a specific compound (Formula 1) that acts as an intermediary between the ITO anode and the hole transport layer. This intermediary layer prevents metal oxide penetration from the ITO into the organic layers and dissipates Joule heat, thereby protecting the element and extending lifespan without compromising electrical function.
Solution Approach 2:
The patent changes the chemical and physical parameters of the hole injection layer by using a compound with specific structural features (aromatic rings, heteroatoms, substituent groups R1-R6) that provide high glass transition temperature and chemical stability. These parameter changes enable the material to resist thermal degradation and metal oxide penetration while maintaining charge injection efficiency.
2Ease of manufacture
If materials with low glass transition temperature are used in the hole transport layer, then the element can be manufactured easily, but the uniformity of the thin film surface collapses during operation
Solution Approach 1:
The patent changes the thermal parameter (glass transition temperature) of the hole transport layer material to a high value through specific molecular design. This parameter change ensures that the thin film maintains its structural uniformity and surface integrity during operation, preventing collapse while remaining compatible with standard deposition processes.
Solution Approach 2:
The patent employs a composite structure where the hole transport layer (Formula 2) is designed with specific molecular compositions that combine high thermal stability with good film-forming properties. This composite material approach achieves both ease of manufacture through deposition and operational stability with maintained surface uniformity.
3Productivity
If existing organic material layer materials are used, then the element structure can be formed, but luminous efficiency, color purity, and life span remain insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the organic materials by introducing specific compounds with optimized molecular designs (Formula 1 for hole injection, Formula 2 for hole transport). These structural changes improve charge injection and transport efficiency, enhance light emission properties for better color purity, and increase thermal stability for extended lifespan.
Solution Approach 2:
The patent uses a composite material system consisting of the ITO anode, the hole injection layer (Formula 1), the hole transport layer (Formula 2), and the cathode. This composite structure synergistically improves luminous efficiency through better charge injection and transport, while the specific material compositions enhance color purity and life span by resisting degradation mechanisms.
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 significantly improves the lifespan, luminous efficiency, and color purity of organic electric elements while maintaining low driving voltage and high heat resistance, outperforming comparative compounds in OLED performance.
Implementation Method 1
A material used as an organic material layer in an organic electric element may be classified into a light emitting material and a charge transport material, for example, a hole injection material, a hole transport material
Implementation Method 2
an organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy of an organic material
Implementation Method 3
it has stability against Joule heat generated during the operation of an organic electric element, that is, a high glass transition temperature
Data Source
AI summary
The present invention provides a novel compound capable of improving light emitting efficiency, stability, and lifespan of the element, an organic electric element using the same, and an electronic device for the same.