Issue 96, 2014

Benzotrithiophene polymers with tuneable bandgap for photovoltaic applications

Abstract

Four benzotrithiophene (BTT) based donor–acceptor polymers have been prepared by alternating with diketopyrrolopyrrole (DPP), thiazolo[5,4-d]thiazole (TTz), thieno[3,4-c]pyrrole-4,6-dione (TPD) and thiadiazolo[3,4-g]quinoxaline (DTBTQx). The BTT-based polymers possess good solubility in common organic solvents and excellent thermal stability. PBTTDPP and PBTTDTBTQx possessed an optical bandgap of 1.27 eV and 1.20 eV, with absorption spectra extending to the near-infrared region. The bulk-heterojunction solar cells delivered a highest PCE of 1.39%, with a short circuit current of 5.46 mA cm−2, an open-circuit voltage of 0.51 V and a fill factor of 0.50.

Graphical abstract: Benzotrithiophene polymers with tuneable bandgap for photovoltaic applications

Article information

Article type
Paper
Submitted
26 Jul 2014
Accepted
02 Oct 2014
First published
02 Oct 2014

RSC Adv., 2014,4, 53939-53945

Benzotrithiophene polymers with tuneable bandgap for photovoltaic applications

L. Bian, J. Miao, J. Hai, E. Zhu, J. Yu, G. Ge, H. Wu and W. Tang, RSC Adv., 2014, 4, 53939 DOI: 10.1039/C4RA07644C

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