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Published on: November 7, 2016
High-mobility pyrene-based semiconductor for organic thin-film transistors
Hyunduck Cho1, Sunyoung Lee, Nam Sung Cho
1Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, Seoul National University, Seoul 151-744, Korea.
ACS Applied Materials & Interfaces
|April 9, 2013
Summary
Researchers developed a novel pyrene-based organic semiconductor for high-performance organic thin-film transistors (OTFTs). This new material exhibits excellent mobility and stability, outperforming traditional pentacene-based devices.
Area of Science:
- Organic electronics
- Materials science
- Semiconductor physics
Background:
- Conjugated oligoacenes and polythiophenes are key organic semiconductors.
- Pyrene-based semiconductors with high performance for organic thin-film transistors (OTFTs) remain largely unexplored.
Purpose of the Study:
- To introduce a novel pyrene-based p-type organic semiconductor.
- To investigate its thin-film characteristics and transistor performance.
Main Methods:
- Synthesized and characterized a new pyrene-based semiconductor: 1,6-bis(5'-octyl-2,2'-bithiophen-5-yl)pyrene (BOBTP).
- Investigated thin-film properties by varying substrate temperature and gate dielectric conditions (self-assembled monolayer).
- Fabricated and tested organic thin-film transistors (OTFTs) under optimized deposition conditions.
Main Results:
- The pyrene-based semiconductor exhibited liquid crystal behavior.
- Optimized OTFTs demonstrated high field-effect mobility (2.1 cm²/V·s) and an on-off current ratio (7.6 × 10⁶).
- Achieved enhanced long-term stability compared to pentacene thin-film transistors.
Conclusions:
- The novel pyrene-based semiconductor offers high performance for organic electronics.
- This material presents a promising alternative to existing organic semiconductors for advanced OTFT applications.
- The study highlights the potential of pyrene derivatives in developing next-generation organic electronic devices.
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