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Issue 48, 2014
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N-phenyl[60]fulleropyrrolidines: alternative acceptor materials to PC61BM for high performance organic photovoltaic cells

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Abstract

A series of novel soluble [60]fulleropyrrolidine derivatives bearing relatively simple substituents like [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) is synthesized under Prato reaction conditions. The photoabsorption and electrochemical properties of the fulleropyrrolidines are investigated to elucidate their molecular-level electronic properties similar to those of PC61BM. The investigations of the fulleropyrrolidines as electron acceptors based on bulk-heterojunction type organic photovoltaic (OPV) devices fabricated using P3HT as a donor show clear differences in performance depending on the substituents, and the devices based on the N-phenyl[60]fulleropyrrolidine derivatives exhibit good power conversion efficiencies (PCEs) comparable to, or even higher than, that of the standard PC61BM-based device. Finally, the OPV devices based on a low-bandgap donor polymer (PTB7) with the N-phenyl[60]fulleropyrrolidines show high PCEs up to 7.3%, which is the highest class performance among [60]fullerene-based OPV devices, indicating that N-phenyl[60]fulleropyrrolidine derivatives are a promising alternative to PC61BM for OPV acceptor materials.

Graphical abstract: N-phenyl[60]fulleropyrrolidines: alternative acceptor materials to PC61BM for high performance organic photovoltaic cells

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Supplementary files

Article information


Submitted
16 Sep 2014
Accepted
27 Oct 2014
First published
10 Nov 2014

J. Mater. Chem. A, 2014,2, 20889-20895
Article type
Paper
Author version available

N-phenyl[60]fulleropyrrolidines: alternative acceptor materials to PC61BM for high performance organic photovoltaic cells

M. Karakawa, T. Nagai, K. Adachi, Y. Ie and Y. Aso, J. Mater. Chem. A, 2014, 2, 20889
DOI: 10.1039/C4TA04857A

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