Dithienothiophene (DTT)-Based Dyes for Dye-Sensitized Solar Cells: Synthesis of 2,6-Dibromo-DTT
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- Dithienothiophene (DTT)-Based Dyes for Dye-Sensitized Solar Cells: Synthesis of 2,6-Dibromo-DTT
- Kwon, Tae-Hyuk; Armel, Vanessa; Nattestad, Andrew; MacFarlane, Douglas R.; Bach, Udo; Lind, Samuel J.; Gordon, Keith C.; Tang, Weihua; Jones, David J.; Holmes, Andrew B.
- STRUCTURE-PROPERTY RELATIONSHIPS; THIN-FILM TRANSISTORS; HIGH-PERFORMANCE; ORGANIC-DYES; EFFICIENT; BROMODECARBOXYLATION; ACIDS; UNIT
- Issue Date
- AMER CHEMICAL SOC
- JOURNAL OF ORGANIC CHEMISTRY, v.76, no.10, pp.4088 - 4093
- A one-pot synthesis of 2,6-dibromodithieno [3,2-b;2', 3'-d]thiophene (dibromo-DTT, 4) was developed. A key step was bromo-decarboxylation 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) or 14.4 mA/cm(2), and ff of 0.73 at 1 sun.
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