Low band gap poly(1,4-arylene-2,5-thienylene)s with benzothiadiazole units: Synthesis, characterization and application in polymer solar cells

Autor: Operamolla, Alessandra1, Colella, Silvia2, Musio, Roberta1, Loiudice, Anna3, Hassan Omar, Omar4, Melcarne, Giovanna2, Mazzeo, Marco2,3, Gigli, Giuseppe2,3, Farinola, Gianluca M.1 farinola@chimica.uniba.it, Babudri, Francesco1 babudri@chimica.uniba.it
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Zdroj: Solar Energy Materials & Solar Cells. Dec2011, Vol. 95 Issue 12, p3490-3503. 14p.
Abstrakt: Abstract: We describe the synthesis of two novel poly(1,4-arylene-2,5-thienylene)s P1 and P2 containing benzo[c][2,1,3]thiadiazole monomeric units via Suzuki–Miyaura polymerization of a thiophene diboronic ester with aryl diiodides. The use of a catalyst complex consisting of Pd(OAc)2 in combination with the electron-rich biaryl phosphine S-Phos resulted in efficient polymerization reactions. The polymers synthesized, P1 and P2, were characterized by UV–vis spectroscopy and cyclic voltammetry. Theoretical calculations and electrochemical measurements on P1 suggested a favorable position of the molecular orbitals for employment in polymer solar cells in combination with PCBM. Devices containing P1:PCBM 1:2 in the active layer showed an efficiency of 1.2% by simple spin casting from chloroform. [Copyright &y& Elsevier]
Databáze: GreenFILE
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