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Acceptor-acceptor type isoindigo-based copolymers for high-performance n-channel field-effect transistors.
Gyoungsik Kim1, A-Reum Han, Hae Rang Lee
1School of Energy and Chemical Engineering, KIER-UNIST Advanced Center for Energy, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea. joonhoh@unist.ac.kr yang@unist.ac.kr.
Chemical Communications (Cambridge, England)
|January 17, 2014
Summary
Two novel electron-deficient copolymers, PIIG-BT and PIIG-TPD, demonstrate unipolar n-type semiconductor behavior. PIIG-BT achieves a record electron mobility of 0.22 cm(2) V(-1) s(-1) for lactam-based n-type copolymers.
Area of Science:
- Organic electronics
- Materials science
- Polymer chemistry
Background:
- Developing high-performance n-type organic semiconductors is crucial for complementary circuits.
- Electron-deficient building blocks are key to achieving n-type behavior in organic copolymers.
Purpose of the Study:
- To design and synthesize novel acceptor-acceptor (A-A) type copolymers.
- To investigate the charge transport properties of these new materials.
- To explore the potential of lactam cores in high-mobility n-type organic semiconductors.
Main Methods:
- Synthesis of two A-A copolymers: PIIG-BT and PIIG-TPD.
- Characterization of their chemical structures and electronic properties.
- Electrical performance testing to determine charge carrier mobility.
Main Results:
- Both synthesized copolymers, PIIG-BT and PIIG-TPD, exhibit unipolar n-type semiconductor characteristics.
- PIIG-BT demonstrates a high electron mobility, reaching up to 0.22 cm(2) V(-1) s(-1).
- This mobility value represents a significant advancement for n-type copolymers utilizing lactam cores.
Conclusions:
- The designed A-A copolymers are effective n-type organic semiconductors.
- PIIG-BT exhibits record-breaking electron mobility, highlighting the potential of lactam-based structures.
- These findings contribute to the advancement of high-performance organic electronic devices.
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