Regioregular pyridyl[2,1,3]thiadiazole-co-indacenodithiophene conjugated polymers.

Lewis acid adducts of narrow band gap conjugated polymers.

We report on the interaction of Lewis acids with narrow band gap conjugated copolymers containing donor and acceptor units. Examination of the widely used poly[(4,4-bis(2-ethylhexyl)cyclopenta-[2,1-b:3,4-b']dithiophene)-2,6-(diyl-alt-benzo[2,1,3]thiadiazole)-4,7-diyl] (1) shows weaker binding with B(C(6)F(5))(3) when compared with a small molecule that contains a cyclopenta-[2,1-b:3,4-b']dithio...

Regioregular copolymers of 3-alkoxythiophene and their photovoltaic application.

Low band gap conjugated polymers with proper energy levels for charge transfer are required to achieve high-efficiency polymer solar cells. We report the synthesis and characterization of two new regioregular copolymers that are based on 3-alkoxythiophene monomers: poly(3-octylthiophene-2,5-diyl-co-3-decyloxythiophene-2,5-diyl) (POT-co-DOT) and poly{(9,9-dioctylfluorene)-2,7-diyl-alt-[4,7-bis(3...

Effect of chiral 2-ethylhexyl side chains on chiroptical properties of the narrow bandgap conjugated polymers PCPDTBT and PCDTPT

Two narrow bandgap conjugated polymers containing chiral 2-ethylhexyl side chains were synthesized: poly[(4,4-bis(2-ethylhexyl)cyclopenta-[2,1-b:3,4-b0]dithiophene)-2,6-diyl-alt-(2,1,3-benzothiadiazole)4,7-diyl] (PCPDTBT*) and poly[(4,4-bis(2-ethylhexyl)cyclopenta[2,1-b:3,4-b0]dithiophene)-2,6-diyl-alt[1,2,5]-thiadiazolo[3,4-c]pyridine] (PCDTPT*). The presence of a chiral substituent provides a...

A low band gap co-polymer of dithienogermole and 2,1,3- benzothiadiazole by Suzuki polycondensation and its application in transistor and photovoltaic cells

reduction of steric hindrance between the solubilising alkyl groups and adjacent thiophene rings. The improved crystalline structure of PSBTBT resulted in a higher charge carrier mobility and improved solar cell performance in blends with fullerene derivatives. Low band gap co-polymers containing silafluorene, 40 dithieno[3,2-b:2′,3′-d]silole 7 and silaindacenodithiophene have recently demonstr...

Coordination polymers and polygons using di-pyridyl-thiadiazole spacers and substituted phosphorodithioato NiII complexes: potential and limitations for inorganic crystal engineering