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Published on: November 7, 2016
Diethynylbenzene-based liquid crystalline semiconductor for solution-processable organic thin-film transistors
Pramod Kandoth Madathil1, Benoît Heinrich, Bertrand Donnio
1Department of Advanced Materials, Hannam University, Daejeon 305-701, Korea.
Journal of Nanoscience and Nanotechnology
|December 9, 2010
Summary
Researchers developed a new liquid crystalline semiconductor (P1) for organic thin-film transistors (OTFTs). Its unique structure enhances charge mobility, paving the way for advanced electronic applications.
Area of Science:
- Materials Science
- Organic Electronics
- Polymer Chemistry
Background:
- Organic thin-film transistors (OTFTs) are crucial for flexible electronics.
- Developing solution-processable semiconductors with high charge mobility is essential.
- Liquid crystalline materials offer potential for improved molecular ordering in thin films.
Purpose of the Study:
- To synthesize and characterize a novel diethynylbenzene-based liquid crystalline semiconductor (P1).
- To evaluate the performance of P1 in organic thin-film transistors (OTFTs).
- To investigate the impact of liquid crystallinity on charge transport properties.
Main Methods:
- Sonogashira coupling reaction for synthesizing compound P1.
- Fabrication of top-contact OTFTs using spin casting.
- Annealing of P1 films at liquid crystalline temperatures.
- Characterization of charge carrier mobility using device performance and time-of-flight (TOF) measurements.
Main Results:
- Successful synthesis and characterization of the novel semiconductor P1.
- Achieved a best hole mobility of 4.5 x 10(-5) cm2/Vs in OTFTs after annealing.
- Observed TOF mobility of 1.5 x 10(-6) cm2/Vs for both positive and negative carriers in the liquid crystalline phase.
- Demonstrated that liquid crystallinity enhances molecular packing and charge mobility.
Conclusions:
- The liquid crystalline semiconductor P1 exhibits promising performance for OTFTs.
- Liquid crystallinity is a key factor in improving molecular packing and charge transport.
- P1 represents a viable candidate for designing solution-processable OTFT materials for electronic applications.
