Shengqiang Xiao, Huaxing Zhou, W. You
Jul 12, 2008
Citations
0
Influential Citations
59
Citations
Journal
Macromolecules
Abstract
We designed and synthesized a family of three structurally related conjugated alternating copolymers, namely poly[2,6-(4,4-dioctyl-4H-cyclopenta[2,1-b:3,4-b]dithiophene)-alt-2,7-(4,5-dioctylbenzo[2,1-b:3,4-b′]dithiophene)] (PBDT), poly[2,6-(4,4-dioctyl-4H-cyclopenta[2,1-b:3,4-b′]dithiophene)-alt-2,9-(5,6-dioctylnaphtho[2,1-b:3,4-b′]dithiophene)] (PNDT), and poly[2,6-(4,4-dioctyl-4H-cyclopenta[2,1-b:3,4-b′]dithiophene)-alt-6,9-(2,3-bis((S)-2,6-dimethylheptyl)dithieno[3,2-f:2′,3′-h]quinoxaline] (PQDT). The repeating units of these three copolymers consist of two modified bithiophene units with one of them planarized by bridging benzo, naphtho, and quinoxalino segments, respectively. The 2,6-(4,4-dioctyl-4H-cyclopenta)[2,1-b;3,4-b′]dithiophene moieties were introduced as the other bithiophene unit to improve the solubility of resultant copolymers, facilitating the polymers characterization and photovoltaic devices fabrications. All polymers were fully characterized, and their applications as donor materials ...