Conjugated Polymer Composition for Carrier Mobility and Solubility
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Solution Overview
Problem
Conjugated polymers used as materials for organic semiconductors lack a combination of high carrier mobility, high heat resistance, high atmospheric stability, and high solubility.
Innovation Solution
A conjugated polymer containing an indenofluorenochalcogenadiazole structure as its structural unit, produced through the reaction of specific monomers in the presence of a transition metal catalyst, exhibits high carrier mobility, solubility, and heat resistance, allowing for the formation of stable organic thin films and efficient operation of organic thin-film transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conjugated polymers are used, then some characteristics are achieved, but it is impossible to combine high carrier mobility, high heat resistance, high atmospheric stability and high solubility simultaneously
Solution Approach 1:
The patent employs a composite molecular structure combining electron-donating units (such as carbazole, triphen胺) with electron-accepting units (such as indenofluorenochalcogenadiazole) to create a D-A type conjugated polymer. This composite structure at the molecular level enables simultaneous achievement of high carrier mobility through charge transfer interactions, high heat resistance through rigid backbone, high atmospheric stability through appropriate functional group selection, and high solubility through alkyl chain substituents.
Solution Approach 2:
The patent applies local quality by introducing different functional groups at specific positions of the polymer backbone. Electron-donating groups are placed at certain positions to enhance carrier mobility, while electron-accepting indenofluorenochalcogenadiazole units are positioned to provide heat resistance and atmospheric stability. Alkyl chain substituents are added at specific locations to improve solubility without compromising the core functional properties.
2Reliability
If polymer structure is optimized for high carrier mobility, then solubility and heat resistance deteriorate
Solution Approach 1:
The patent utilizes parameter changes by systematically varying the type and length of alkyl chain substituents (C1-C50 alkyl groups) attached to the polymer backbone. By adjusting these parameters, the patent optimizes the balance between carrier mobility and solubility. Longer alkyl chains improve solubility while the core D-A structure maintains high carrier mobility. The patent also varies the specific electron-donating units to tune the overall properties.
3Temperature
If polymer structure is optimized for high heat resistance, then atmospheric stability and solubility deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-designing the polymer structure with inherent atmospheric stability features before considering heat resistance optimization. The selection of chemically stable indenofluorenochalcogenadiazole units and appropriate electron-donating groups with resistance to oxidation and degradation ensures atmospheric stability is built into the molecular structure from the outset, while the rigid backbone configuration simultaneously provides high heat resistance.
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 conjugated polymer achieves high carrier mobility, heat resistance, and solubility, enabling stable operation of organic thin-film transistors with improved film-forming properties.
Implementation Method 1
produced through the reaction of specific monomers in the presence of a transition metal catalyst
Data Source
AI summary
The compound according to the present disclosure is a compound represented by general formula (1) below.