Thiadiazol Polymer for Organic Electronics
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Solution Overview
Problem
The progress in organic electronic materials has been hindered by the difficulty in predicting the properties of resulting materials, limiting the development of new semiconducting polymers for applications like organic photovoltaics and field-effect transistors.
Innovation Solution
A novel conjugated polymer comprising a thiadiazol group is developed, which exhibits good processability, high solubility, and suitable properties for use in organic electronic devices, including low bandgaps, high charge carrier mobilities, and long lifetime, facilitating its use as an electron acceptor in both n-type and p-type semiconducting compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional amorphous silicon technology is used, then device performance is achieved, but production cost is high and throughput is low
Solution Approach 1:
The patent changes the material parameter from inorganic amorphous silicon to organic semiconducting materials, enabling solution processing instead of vacuum deposition. This fundamental material parameter change allows low-cost production methods like spin casting, dip coating, and ink jet printing, achieving both high throughput and low production cost while maintaining device performance
Solution Approach 2:
The patent replaces the mechanical vacuum deposition system with solution-based chemical processing methods. Organic semiconducting materials are processed in solution form, allowing deposition through simple techniques like spin casting and dip coating, eliminating complex vacuum equipment and reducing manufacturing cost while increasing productivity
2Ease of manufacture
If organic semiconducting materials are used, then solution processability and low-cost production are achieved, but material properties are difficult to predict
Solution Approach 1:
The patent systematically varies molecular structure parameters of organic semiconducting materials, including backbone structure, side chains, and functional groups. By controlling these molecular parameters, the invention achieves predictable relationships between molecular structure and material properties such as bandgap, charge carrier mobility, and solubility, enabling rational material design while maintaining solution processability
Solution Approach 2:
The patent introduces specific functional groups and side chain modifications at local positions in the molecular structure to tune global material properties. For example, adding electron-donating or electron-withdrawing groups at specific positions allows precise control over HOMO/LUMO levels, bandgap, and charge transport properties while maintaining overall material processability
3Reliability
If polymers with high charge carrier mobility are developed, then device performance improves, but material complexity increases
Solution Approach 1:
The patent creates copolymer structures combining different functional units - electron-donating units and electron-accepting units - to achieve high charge carrier mobility. The composite molecular structure allows optimization of charge transport pathways while maintaining solution processability and controlling bandgap, achieving high device performance without excessive material complexity
Solution Approach 2:
The patent divides the polymer chain into distinct functional segments or repeating units with specific roles - some units provide charge transport pathways, others provide solubility, and others tune energy levels. This segmentation allows independent optimization of each function, achieving high charge carrier mobility through well-defined molecular architecture rather than complex random structures
Data Source
AI summary
The present invention relates to a novel polymer comprising a thiadiazol group, the production of such a polymer, its use in organic electronic devices as well a such organic electronic devices.