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Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates
Published on: January 17, 2018
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Dithienylthienothiophenebisimide, a Versatile Electron-Deficient Unit for Semiconducting Polymers.
Masahiko Saito1, Itaru Osaka1, Yosuke Suda2
1RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
Advanced Materials (Deerfield Beach, Fla.)
|May 24, 2016
Summary
Novel polymers based on dithienylthienothiophenebisimide (PTBIs) achieve high efficiencies in organic photovoltaic (OPV) cells. These versatile materials also demonstrate tunable electronic properties for transistors.
Area of Science:
- Materials Science
- Organic Electronics
- Polymer Chemistry
Background:
- Organic semiconductors are crucial for next-generation electronic devices.
- Developing new building blocks with tunable electronic properties is essential for advancing organic photovoltaics (OPVs) and field-effect transistors (FETs).
Purpose of the Study:
- To synthesize and characterize a novel electron-deficient building unit, dithienylthienothiophenebisimide (PTBI).
- To investigate the performance of polymers derived from PTBI (PTBIs) in organic photovoltaic (OPV) devices and field-effect transistors (FETs).
Main Methods:
- Synthesis of dithienylthienothiophenebisimide (PTBI) building unit.
- Polymerization to create PTBI-based polymers (PTBIs).
- Fabrication and characterization of OPV cells and FETs using PTBIs.
Main Results:
- PTBI-based polymers (PTBIs) achieved 8.0% power conversion efficiencies in OPV cells when used as p-type materials.
- Open-circuit voltages exceeding 1 V were recorded for PTBI-based OPVs.
- PTBIs demonstrated n-type behavior in OPVs and exhibited p-channel, n-channel, and ambipolar characteristics in FETs, depending on molecular structure.
Conclusions:
- Dithienylthienothiophenebisimide (PTBI) is a versatile electron-deficient building block for high-performance organic electronic materials.
- PTBI-based polymers offer tunable properties for both organic photovoltaics and field-effect transistors.
- The ability to function as both p-type and n-type materials highlights the potential of PTBIs in diverse electronic applications.
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