title: Dithienothiophene (DTT)-based dyes for dye-sensitized solar cells: synthesis of 2,6-dibromo-DTT.
abstract: A one-pot synthesis of 2,6-dibromodithieno[3,2-b;2',3'-d]thiophene (dibromo-DTT, 4) was developed. A key step was bromodecarboxylation of DTT-2,6-dicarboxylic acid, obtained by saponification of the diester 1. The donor-acceptor dye DAHTDTT (13), based on a central 2,6-bis[2'-(3'-hexylthienyl)]dithieno[3,2-b;2',3'-d]thiophene core (9), was prepared and incorporated in a dye-sensitized solar cell (DSC), which exhibited an energy conversion efficiency of 7.3% with V(oc) of 697 mV, J(sc) of 14.4 mA/cm(2), and ff of 0.73 at 1 sun.
authors.affiliation: School of Chemistry, Bio21 Institute, University of Melbourne , Parkville, Vic 3010, Australia.
authors.forename: Tae-Hyuk
authors.initials: TH
authors.lastname: Kwon
authors.forename: Vanessa
authors.initials: V
authors.lastname: Armel
authors.forename: Andrew
authors.initials: A
authors.lastname: Nattestad
authors.forename: Douglas R
authors.initials: DR
authors.lastname: Macfarlane
authors.forename: Udo
authors.initials: U
authors.lastname: Bach
authors.forename: Samuel J
authors.initials: SJ
authors.lastname: Lind
authors.forename: Keith C
authors.initials: KC
authors.lastname: Gordon
authors.forename: Weihua
authors.initials: W
authors.lastname: Tang
authors.forename: David J
authors.initials: DJ
authors.lastname: Jones
authors.forename: Andrew B
authors.initials: AB
authors.lastname: Holmes
mesh_terms: D004396:Coloring Agents / Q000138:chemical synthesis* / Q000737:chemistry*; D004553:Electric Conductivity; D011211:Electric Power Supplies; D012993:Solar Energy; D013876:Thiophenes / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: C560848:2,6-dibromo-dithienothiophene; D004396:Coloring Agents; D013876:Thiophenes