Heteroaromatic Semiconducting Polymers for Printed Electronics
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Solution Overview
Problem
Current organic semiconductor materials face challenges in achieving high charge carrier mobilities, stability, and cost-effective processing, particularly for polymeric semiconductors which are less easily processable via printing methodologies due to solution viscosity requirements.
Innovation Solution
Development of organic semiconducting polymers with specific repeating units that exhibit excellent charge transport characteristics, chemical stability, and low-temperature processability, allowing for the fabrication of high-performance field-effect transistors and other devices such as OPVs and OLEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymeric semiconductors are used, then processability via printing methodologies is improved, but charge carrier mobility is reduced
Solution Approach 1:
The patent modifies the chemical structure of polymeric semiconductor repeating units by incorporating electron-withdrawing groups and heteroatoms to optimize the balance between processability and charge carrier mobility. Specific structural parameters such as ring substitution patterns and side chain configurations are adjusted to achieve desired material properties
Solution Approach 2:
The patent creates copolymers combining different repeating units with complementary properties - one unit optimized for processability and another for charge transport. This composite approach allows simultaneous achievement of good printability and high charge carrier mobility through synergistic material design
2Reliability
If molecular semiconductors are used, then charge carrier mobility is improved, but ease of processing via printing is reduced
Solution Approach 1:
The patent divides the semiconductor material into polymeric chains with repeating units, where each unit contributes to overall charge transport while the polymeric nature enables solution processing. This segmentation allows the material to exhibit both molecular-like charge transport and polymer-like processability
3Productivity
If high charge carrier mobility is achieved, then device efficiency is improved, but material stability in ambient conditions deteriorates
Solution Approach 1:
The patent introduces electron-withdrawing groups and heteroatoms at specific positions within the repeating unit structure to create localized regions of electron deficiency that enhance both charge carrier mobility and environmental stability. The local structural modifications provide targeted property enhancement without compromising overall material stability
Data Source
AI summary
The present teachings relate to new semiconducting polymers. The polymers disclosed herein can exhibit high carrier mobility and/or efficient light absorption/emission characteristics, and can possess certain processing advantages such as solution-processability and/or good stability at ambient conditions.