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Low-bandgap donor–acceptor copolymers with 4,6-bis(3´-(2-ethylhexyl)thien-2´-yl)thieno[3,4-c][1,2,5]thiadiazole: synthesis, optical, electrochemical, and photovoltaic properties
- 1.0360802 - ÚMCH 2012 RIV US eng J - Journal Article
Cimrová, Věra - Kmínek, Ivan - Pavlačková, Petra - Výprachtický, Drahomír
Low-bandgap donor–acceptor copolymers with 4,6-bis(3´-(2-ethylhexyl)thien-2´-yl)thieno[3,4-c][1,2,5]thiadiazole: synthesis, optical, electrochemical, and photovoltaic properties.
Journal of Polymer Science. Part A - Polymer Chemistry. Roč. 49, č. 15 (2011), s. 3426-3436. ISSN 0887-624X. E-ISSN 1099-0518
R&D Projects: GA MŠMT(CZ) 1M06031
Institutional research plan: CEZ:AV0Z40500505
Keywords : conjugated polymers * electrochemistry * lowbandgap
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 3.919, year: 2011
Two new low-bandgap alternating copolymers (CEHTF and CEHTP) consisting of 4,6-bis(3′-(2-ethylhexyl)thien-2′-yl)thieno[3,4-c][1,2,5] thiadiazole and 9,9-bis(2-ethylhexyl)fluorene or 2,5-bis(isopentyloxy)benzene were synthesized. Their optical, electrochemical, and photovoltaic (PV) properties were studied and are reported. Both the copolymers exhibited long-wavelength absorption covering the whole visible spectral region, which is in CEHTP thin films extended up to near infrared region. Low-optical bandgap values, 1.37 and 1.15 eV, were determined for CEHTF and CEHTP, respectively. PV devices with bulk heterojunction made of blends of copolymers and fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester were prepared and characterized. Effects of intramolecular charge transfer strength and side-chain nature and length on photophysical properties are discussed.
Permanent Link: http://hdl.handle.net/11104/0006501
Number of the records: 1