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Crystalline polymer nanowires originating from solution-state aggregation for high-performance field-effect
Zeng Wu1, Longfei Yang1, Yangjiang Wu1
1Laboratory of Molecular Materials and Devices, Department of Materials Science, Fudan University, Shanghai 200433, P. R. China. zhaoy@fudan.edu.cn.
Nanoscale
|August 12, 2025
Summary
Researchers developed crystalline polymer nanowires for high-performance organic field-effect transistors (OFETs). This method leverages solution aggregate structures to achieve ordered molecular stacking, significantly boosting charge-carrier transport and device mobility.
Area of Science:
- Materials Science
- Organic Electronics
- Polymer Chemistry
Background:
- Ordered molecular stacking in polymer semiconductors is crucial for efficient charge transport.
- Polymer chain entanglement hinders the formation of highly oriented structures.
Purpose of the Study:
- To develop a facile method for fabricating crystalline polymer nanowires for high-performance organic field-effect transistors (OFETs).
- To investigate the influence of solvent on polymer pre-aggregation and solid-state structure formation.
- To achieve high charge-carrier mobility in OFETs by controlling molecular packing.
Main Methods:
- Fabrication of crystalline nanowires using diketopyrrolopyrrole-dithienyl-thieno[3,2-b]thiophene (DPP-DTT).
- Morphological studies of DPP-DTT films prepared with different solvents.
- Controlled processing temperature to induce nanowire formation from fibrous networks.
Main Results:
- Achieved crystalline nanowires by controlling processing temperature based on solution-state fibrous networks.
- Organic field-effect transistors (OFETs) based on these nanowires demonstrated high mobility (max 11.06 cm2 V-1 s-1, avg 6.02 cm2 V-1 s-1).
- Mobility was an order of magnitude higher than that of film-based devices.
Conclusions:
- Demonstrated a strategy for regulating molecular packing via inheritance of aggregate structure from solution to solid state.
- Advanced research on crystalline polymer nanowires and high-performance organic electronic devices.
