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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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Publication details

The article was received on 20 Mar 2014, accepted on 29 Apr 2014 and first published on 30 Apr 2014


Article type: Paper
DOI: 10.1039/C4TC00563E
Citation: J. Mater. Chem. C, 2014,2, 4922-4927
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    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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