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Issue 25, 2014
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Identifying effects of TiO2 nanowires inside bulk heterojunction organic photovoltaics on charge diffusion and recombination

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Abstract

The charge carrier dynamics of poly(3-hexylthiophene) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) organic bulk-heterojunction photovoltaics with and without TiO2 nanowires are studied. Using inorganic nanowires as electron transport pathways improves the charge transit time and electron diffusion coefficient, which is the origin of fill factor and power conversion efficiency improvement observed in these devices. Through further comparison of devices with surface-modified nanowires (PCB–TiO2-NW), it is found that under AM 1.5 light illumination, charge recombination is dominant in the organic layer rather than at the TiO2 nanowire surface.

Graphical abstract: Identifying effects of TiO2 nanowires inside bulk heterojunction organic photovoltaics on charge diffusion and recombination

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Supplementary files

Article information


Submitted
20 Mar 2014
Accepted
29 Apr 2014
First published
30 Apr 2014

J. Mater. Chem. C, 2014,2, 4922-4927
Article type
Paper
Author version available

Identifying effects of TiO2 nanowires inside bulk heterojunction organic photovoltaics on charge diffusion and recombination

P. Yang, D. F. Zeigler, K. C. Bryant, T. R. Martin, D. R. Gamelin and C. K. Luscombe, J. Mater. Chem. C, 2014, 2, 4922
DOI: 10.1039/C4TC00563E

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