Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 212, Issue 21, Pages 2308-2318Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201100313
Keywords
conjugated polymers; dithienopyrrole; organic field-effect transistors; organic solar cells
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Funding
- Ministry of Education, Science and Technology (MEST) of Korea
- National Research Foundation of Korea
- Korean Government (MEST) [NRF-2009-C1AAA001-2009-0092950, 2010-0029212]
- Korea Ministry of Knowledge Economy (MKE) [2008-N-PV08-P-01]
- GIST
- MEST of Korea [R31-20008-000-10026-0]
- NRF
- MEST [R15-2008-006-02001-0]
- BioImaging Research Center at GIST
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A series of conjugated polymers (PDTP, PDTPT, PDTPTT) based on dithieno[3,2-b:2',3'-d]pyrrole (DTP) containing branched side-chains is synthesized. The synthesized polymers show good solubility due to branched side-chains in the organic solvent in the absence of heat treatment. To increase the oxidation potential, unsubstituted thiophene units are introduced into the polymer backbone. The introduction of unsubstituted thiophene units increases the oxidation potential, elevates degradation temperature, and enhances electronic properties. The PDTPTT FETs show the highest charge-carrier mobility among the three polymers. These polymers are used as a donor material in bulk heterojunction solar cells, and the PDTPTT photovoltaic cells exhibit high performance.
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