Issue 36, 2012
From the journal:

Journal of Materials Chemistry

Porphyrin–oligothiophene conjugates as additives for P3HT/PCBM solar cells†

Dani M. Lyons,a   Robert J. Ono,a   Christopher W. Bielawskia  and  Jonathan L. Sessler*a  

* Corresponding authors

a Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
E-mail: sessler@cm.utexas.edu

Abstract

The power conversion efficiency (PCE) of poly(3-hexylthiophene)/fullerene (P3HT/PCBM) bulk heterojunction solar cells is enhanced through the addition of Ni(II) porphyrin–oligothiophene conjugates to typical P3HT/PCBM blends. The introduction of the porphyrin dyes increases the efficiency by up to 63 ± 20% compared with P3HT/PCBM control devices containing no additives. Moreover, external quantum efficiency (EQE) measurements show a 10 ± 5% enhancement in photocurrent compared to control blends. These results lead us to conclude that the photo-induced dissociation of P3HT excitons is promoted in the presence of the Ni(II) porphyrin–oligothiophenes and that the Ni(II) porphyrin subunits act as light-harvesting sensitizers as well as energy conduits for the P3HT excitons at P3HT/PCBM interfaces.

Graphical abstract: Porphyrin–oligothiophene conjugates as additives for P3HT/PCBM solar cells

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Article information

DOI
https://doi.org/10.1039/C2JM34037B
Article type
Paper
Submitted
21 Jun 2012
Accepted
25 Jul 2012
First published
26 Jul 2012

J. Mater. Chem., 2012,22, 18956-18960

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Porphyrin–oligothiophene conjugates as additives for P3HT/PCBM solar cells

D. M. Lyons, R. J. Ono, C. W. Bielawski and J. L. Sessler, J. Mater. Chem., 2012, 22, 18956 DOI: 10.1039/C2JM34037B

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