Metal Carboxylate Electron Transfer Layer for Photodiodes
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Solution Overview
Problem
Current organic compounds used in photodiodes face challenges in minimizing injection current under reverse bias and require a clean room environment to avoid impurities, limiting their performance and availability for certain applications.
Innovation Solution
A novel electron transfer composition comprising metal carboxylates, such as polymers with metal ions like cesium and barium, is used to form an electron transfer layer in organic electronic devices, which can be processed using solution deposition methods to create thin layers for improved performance and reduced impurity issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic compounds are used in photodiodes, then the device can be fabricated with standard materials, but the injection current under reverse bias cannot be minimized and impurities cannot be avoided
Solution Approach 1:
The patent changes the chemical composition parameters by introducing metal carboxylates (specifically cesium carboxylate and barium carboxylate) into the electron transfer layer. This compositional parameter change enables both minimization of injection current under reverse bias and reduction of impurity formation, resolving the contradiction between reliability and harmful factors.
Solution Approach 2:
The patent creates a composite electron transfer layer by combining metal carboxylates with organic compounds. This composite material approach allows the layer to simultaneously achieve low injection current and low impurity content, as the metal carboxylate components work synergistically with the organic matrix to improve overall device performance while reducing harmful effects.
2Ease of manufacture
If conventional electron transport materials are used, then the layer can be formed with standard materials, but the production requires clean room environment to avoid impurities
Solution Approach 1:
The patent changes the material composition parameters by using metal carboxylates which inherently provide better impurity resistance. This allows the electron transfer layer to be manufactured with acceptable purity levels in less stringent environments, reducing the requirement for clean room facilities while maintaining manufacturing precision.
Solution Approach 2:
The patent employs metal carboxylate compounds that can be processed from solution and deposited as thin layers, enabling simpler, more accessible manufacturing processes. These materials allow production without requiring expensive clean room infrastructure, making the fabrication process more accessible and cost-effective.
3Adaptability or versatility
If standard organic compounds are used, then the compound pool is limited, but the available compositions for certain applications are insufficient
Solution Approach 1:
The patent expands the available compound pool by introducing metal carboxylates as a new class of materials for electron transfer layers. This composite material approach creates new compositional possibilities that enhance device performance for specific applications while increasing the versatility of available organic electronic materials.
Solution Approach 2:
The patent changes the chemical space by incorporating metal-containing carboxylate compounds, which have distinct electronic and transport properties compared to conventional organic compounds. This parameter change in composition enables improved performance for certain applications and expands the range of adaptable materials available for organic electronics.
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 electron transfer composition enhances the performance of photodiodes by minimizing reverse current and allowing for cleaner production processes, expanding the pool of available compounds and compositions for organic electronic devices.
Implementation Method 1
an electron transfer composition comprising one or more metal ion comprising compound
Data Source
Figure 1a~1b
Figure 1c~2
AI summary
The present invention relates to a novel electron transfer composition comprising one or more metal ion comprising compound, the use of such electron transfer composition in organic electronic devices, particularly in photodiodes, as well as such organic electronic devices, particularly photodiodes.