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Synthesis and Characterization of Poly(Dithieno[3,2‐ b :2′,3′‐ d ]pyrrole) Derivatives Containing Thiophene Moieties and Their Application to Organic Devices
Author(s) -
Jeong HyungGu,
Lim Bogyu,
Na SeokIn,
Baeg KangJun,
Kim Juhwan,
Yun JinMun,
Kim DongYu
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100313
Subject(s) - thiophene , side chain , polymer , pyrrole , conjugated system , polymer chemistry , solubility , polymer solar cell , organic solar cell , materials science , chemistry , solvent , conductive polymer , organic chemistry
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.