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High-Performance Phototransistors Based on PDIF-CN2 Solution-Processed Single Fiber and Multifiber Assembly.
Wassima Rekab1, Marc-Antoine Stoeckel1, Mirella El Gemayel1
1Nanochemistry Laboratory, ISIS & icFRC, Université de Strasbourg & CNRS , 8 allée Gaspard Monge, 67000 Strasbourg, France.
ACS Applied Materials & Interfaces
|March 30, 2016
Summary
Organic field-effect transistors fabricated with single PDIF-CN2 fibers show high mobility and excellent responsivity. This demonstrates the importance of supramolecular order for high-performance organic electronics.
Area of Science:
- Organic electronics
- Materials science
- Supramolecular chemistry
Background:
- Organic phototransistors are crucial for light-sensing applications.
- Controlling molecular order is key to enhancing device performance.
Purpose of the Study:
- To fabricate and characterize organic phototransistors using self-assembled PDIF-CN2 fibers.
- To compare the performance of fiber-based devices with thin-film devices.
Main Methods:
- Solvent-induced precipitation to create PDIF-CN2 fibers.
- Fabrication of three-terminal organic phototransistors.
- Comparison of optoelectronic properties (mobility, responsivity, photosensitivity).
Main Results:
- Single-fiber devices exhibited mobilities exceeding 2 cm(2) V(-1) s(-1).
- Highest reported responsivity (R > 2 × 10(3) AW(-1)) and photosensitivity (P > 5 × 10(3)) for PDI-based phototransistors.
- Superior air-stability in devices with highly crystalline architectures.
Conclusions:
- High supramolecular order in PDIF-CN2 fibers leads to efficient charge transport and exciton collection.
- Engineered molecular architectures are critical for developing stable, high-performance organic phototransistors.
- Fiber-based devices offer a promising route for advanced organic electronic applications.
