Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 47, 2013
Previous Article Next Article

Low band-gap donor–acceptor copolymers based on dioxocyclopenta[c]thiophene derivatives as acceptor units: synthesis, properties, and photovoltaic performances

Author affiliations

Abstract

New donor–acceptor type copolymers containing dihexyldioxocyclopenta[c]thiophene or (dihexylmethylidene)dioxocyclopenta[c]thiophene as acceptor units have been designed and synthesized for the application as hole-transporting (p-type) organic semiconducting materials in organic photovoltaics (OPVs). The investigation of photophysical and physicochemical properties revealed that these copolymers featured low optical band gaps (1.56–1.73 eV) and low-lying HOMO energy levels (−5.40 to −5.02 eV). Bulk heterojunction OPV devices based on these copolymers and [6,6]-phenyl-C61-butyric acid methyl ester as active layers showed moderate power conversion efficiencies (PCEs) of between 1.36 and 2.68% under air mass 1.5 simulated solar illumination. Space-charge-limited current measurements and atomic force microscopy measurements of the blend films revealed that both charge-transporting characteristics and film morphologies have significant influences on the photovoltaic performances. OPV devices based on the copolymers with [6,6]-phenyl-C71-butyric acid methyl ester showed a PCE of up to 5.17% with a short circuit current of 10.1 mA cm−2, an open circuit voltage of 0.80 V and a fill factor of 0.64.

Graphical abstract: Low band-gap donor–acceptor copolymers based on dioxocyclopenta[c]thiophene derivatives as acceptor units: synthesis, properties, and photovoltaic performances

Back to tab navigation

Supplementary files

Article information


Submitted
03 Sep 2013
Accepted
10 Oct 2013
First published
15 Oct 2013

J. Mater. Chem. A, 2013,1, 15000-15009
Article type
Paper

Low band-gap donor–acceptor copolymers based on dioxocyclopenta[c]thiophene derivatives as acceptor units: synthesis, properties, and photovoltaic performances

J. Huang, Y. Ie, M. Karakawa and Y. Aso, J. Mater. Chem. A, 2013, 1, 15000
DOI: 10.1039/C3TA13504G

Social activity

Search articles by author

Spotlight

Advertisements