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Highly-ordered Triptycene Modifier Layer Based on Blade Coating for Ultraflexible Organic Transistors.
Masaya Kondo1,2,3, Takashi Kajitani4, Takafumi Uemura5,6
1The Institute of Scientific and Industrial Research, Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
Scientific Reports
|June 26, 2019
Summary
We developed a new, highly ordered surface layer using triptycene (Trip) derivatives processed from solution. This advancement significantly boosts organic thin-film transistor (OTFT) performance by over 40%.
Area of Science:
- Materials Science
- Organic Electronics
- Surface Chemistry
Background:
- Triptycene (Trip) derivatives form ordered layers on polymer dielectrics, enhancing organic semiconductor (OSC) growth for organic thin-film transistors (OTFTs).
- Previous methods like thermal vacuum evaporation (TVE) produced Trip layers with disorders, limiting optimal OSC growth and OTFT mobility.
Purpose of the Study:
- To develop a highly ordered, disorder-free triptycene (Trip) surface modification layer for polymer dielectrics.
- To improve the performance of organic thin-film transistors (OTFTs) by optimizing the Trip layer's structure.
- To demonstrate the application of these improved OTFTs in electronic circuits.
Main Methods:
- Solution processing of triptycene (Trip) derivatives via blade coating to create ordered surface layers on polymer dielectrics.
- Fabrication and characterization of organic thin-film transistors (OTFTs) using the developed Trip layers.
- Comparison of OTFT performance with highly ordered Trip layers versus disordered layers from thermal vacuum evaporation (TVE).
Main Results:
- A highly ordered, 2D hexagonal array of triptycene (Trip) molecules was successfully formed on polymer dielectrics using ambient solution processing.
- The highly ordered Trip layer enhanced OTFT mobility by over 40% compared to the disordered layer fabricated by TVE.
- A functional ring oscillator circuit was successfully demonstrated using OTFTs incorporating the highly ordered Trip layer.
Conclusions:
- Ambient solution-processed triptycene (Trip) derivatives provide a superior method for creating highly ordered surface modification layers.
- Disorder-free Trip layers significantly enhance organic semiconductor growth and boost OTFT performance.
- This approach enables the development of high-performance organic electronics, including functional circuits.
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