Related Experiment Video
Updated: May 24, 2026
07:12
A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
Published on: August 28, 2018
Microstructure evolution and device performance in solution-processed polymeric field-effect transistors: the key
Suhao Wang1, Adam Kiersnowski, Wojciech Pisula
1Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
Journal of the American Chemical Society
|February 23, 2012
Summary
The first polymer monolayer is crucial for film microstructure and charge transport in organic field-effect transistors (OFETs). Optimal film density and chain alignment enhance charge carrier mobility.
Area of Science:
- Materials Science
- Organic Electronics
Background:
- Understanding polymer film microstructure is key for charge carrier transport in organic field-effect transistors (OFETs).
- The initial monolayer significantly influences subsequent film development and device performance.
Purpose of the Study:
- To investigate the role of the first monolayer in the evolution of conjugated polymer film microstructure.
- To correlate film microstructure with charge carrier transport properties in OFETs.
Main Methods:
- Fabrication of poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) films via solution deposition by tuning dip-coating speed.
- Characterization of film microstructure and its impact on charge carrier transport in field-effect transistors (FETs).
Main Results:
- The monolayer acts as a foundational layer for film growth.
- Significant charge carrier transport improvement requires a critical multilayer network density for percolation pathways.
- Low dip-coating speeds induce uniaxial polymer chain orientation, leading to structural anisotropy.
Conclusions:
- The initial monolayer's quality dictates the overall film microstructure and performance.
- Achieving high charge carrier mobility in PBTTT-based OFETs depends on controlled film morphology and chain alignment.
- Dip-coating speed is a critical parameter for tuning polymer microstructure and optimizing charge transport in OFETs.
