title: Synthesis of a low band gap polymer and its application in highly efficient polymer solar cells.
abstract: HOMO level of the PBDTTT-based polymer was successfully reduced by introducing an ketone group in place of the ester group. The average PCE of the PBDTTT-based devices reached 6.3% with a champion PCE result of 6.58%. Due to its highly efficient photovoltaic performance and more feasible synthesis approach, PBDTTT-C has the potential to be successfully applied in the large-scale manufacturing of polymer solar cells.
authors.affiliation: Solarmer Energy, Inc., El Monte, California 91731, USA. jianhuih@solarmer.com
authors.forename: Jianhui
authors.initials: J
authors.lastname: Hou
authors.forename: Hsiang-Yu
authors.initials: HY
authors.lastname: Chen
authors.forename: Shaoqing
authors.initials: S
authors.lastname: Zhang
authors.forename: Ruby I
authors.initials: RI
authors.lastname: Chen
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
authors.forename: Gang
authors.initials: G
authors.lastname: Li