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Hyperbranched Diketopyrrolopyrrole-based Polymers Constructed via Linear Side-Chains towards Organic Field-Effect
Zhaoqiong Zhou1, Yan Li2, Pinyu Chen1
1State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|November 30, 2022
Summary
Hyperbranched polymers improve organic field-effect transistor (OFET) performance. This approach enhances charge mobility and device stability in OFETs, offering potential for future electronic applications.
Area of Science:
- Materials Science
- Organic Electronics
- Polymer Chemistry
Background:
- Conjugated polymers are key for organic field-effect transistors (OFETs) due to high charge mobility.
- Achieving both high mobility and robust device stability in polymer-based OFETs remains a significant challenge.
- Current strategies often face limitations in balancing these critical performance metrics.
Purpose of the Study:
- To investigate a novel hyperbranched polymer architecture for enhancing OFET performance.
- To synthesize and characterize diketopyrrolopyrrole-based hyperbranched polymers.
- To evaluate the impact of hyperbranched structures on charge mobility and device stability.
Main Methods:
- Design and synthesis of three diketopyrrolopyrrole-based hyperbranched polymers using linear alkyl side-chain linkers.
- Fabrication of bar-coated organic field-effect transistors (OFETs).
- Characterization of thin film microstructures, charge mobility, and operational stabilities (bias stability, bending resistance).
Main Results:
- 2D topological hyperbranched polymers formed stable thin film microstructures, enhancing device stability.
- Linear alkyl chains reduced steric hindrance, improving microstructure ordering and charge mobility compared to branched chains.
- Bar-coated OFETs exhibited improved mobilities and enhanced operational stabilities.
Conclusions:
- Hyperbranched polymer architecture offers a promising strategy for simultaneously improving charge mobility and device stability in OFETs.
- The interconnection of conjugated moieties via linear alkyl chains is crucial for enhanced performance.
- These findings position hyperbranched polymers as strong candidates for advanced organic electronic devices.
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