Synthesis of Poly(4,4-dialkyl-cyclopenta[2,1- b:3,4- b']dithiophene- alt-2,1,3-benzothiadiazole) (PCPDTBT) in a Direct Arylation Scheme

Sebastian Kowalski; Sybille Allard; Ullrich Scherf

doi:10.1021/mz300093w

Synthesis of Poly(4,4-dialkyl-cyclopenta[2,1- b:3,4- b']dithiophene- alt-2,1,3-benzothiadiazole) (PCPDTBT) in a Direct Arylation Scheme

ACS Macro Lett. 2012 Apr 17;1(4):465-468. doi: 10.1021/mz300093w. Epub 2012 Mar 20.

Authors

Sebastian Kowalski¹, Sybille Allard¹, Ullrich Scherf¹

Affiliation

¹ Macromolecular Chemistry Group (buwmakro) and Institute for Polymer Technology, Bergische Universität Wuppertal, Gauss-Str. 20, D-42097 Wuppertal, Germany.

PMID: 35585742
DOI: 10.1021/mz300093w

Abstract

Poly(4,4-dialkyl-cyclopenta[2,1-b:3,4-b']dithiophene-alt-2,1,3-benzothiadiazole) (PCPDTBT), a potentially interesting low bandgap donor copolymer for bulk heterojunction-type organic solar cells with a power conversion efficiency >5.5%, can be now synthesized in a direct arylation scheme starting from 4,4-dialkyl-cyclopenta[2,1-b:3,4-b']dithiophene (CPDT) and 4,7-dibromo-2,1,3-benzothiadiazole (4,7-dibromo-BT) as monomers. The direct arylation procedure leads to PCPDTBT with an M_n of up to 40 000 and circumvents the use of costly diboronic acid/ester or distannyl monomers.