Synthesis and Evaluation of Scalable D-A-D π-Extended Oligomers as p-Type Organic Materials for Bulk-Heterojunction Solar Cells

Polymers

Andrea Nitti¹  Dario Pasini¹  Peshawa Osw¹  MediaN. Abdullah²  SamuelI. Etkind³  Alessandro Galbiati⁴  Jeremiah Mwaura⁵ 

[1] Department of Chemistry and INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy;Department of Chemistry, College of Science, Salahaddin University, 44001 Erbil, Kurdistan, Iraq;Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;New Polyurethane Technologies s.r.l., Via Stazione 12, 27030 Villanova D’ardenghi, Pavia, Italy;Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;

关键词: cascade organic reactions;    π-conjugated oligomers;    direct arylation;    organic electronics;    fused aromatic rings;    organic photovoltaics;    bulk-heterojunction organic solar cells;   

DOI  :  10.3390/polym12030720

来源: DOAJ

【 摘 要 】

The synthesis and characterization of four novel donor-acceptor-donor π-extended oligomers, incorporating naphtha(1−b)thiophene-4-carboxylate or benzo(b)thieno(3,2-g) benzothiophene-4-carboxylate 2-octyldodecyl esters as end-capping moieties, and two different conjugated core fragments, is reported. The end-capping moieties are obtained via a cascade sequence of sustainable organic reactions, and then coupled to benzo(c)(1,2,5)thiadiazole and its difluoro derivative as the electron-poor π-conjugated cores. The optoelectronic properties of the oligomers are reported. The novel compounds revealed good film forming properties, and when tested in bulk-heterojunction organic photovoltaic cell devices in combination with PC₆₁BM, revealed good fill factors, but low efficiencies, due to their poor absorption profiles.

【 授权许可】

Unknown