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Issue 111, 2015
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Combustion deposition of MoO3 films: from fundamentals to OPV applications

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Abstract

A systematic study of a combustion precursor's thermal decomposition pathway is undertaken, in both powders and thin films, to obtain insights in the various parameters influencing the combustion process. The study focuses on MoO3 as a hole transporting layer (HTL) for applications in organic photovoltaics (OPV). Via evolved gas analysis, it was found that fuel volatility occurs prior to the actual combustion reaction of the acetylacetonate based precursor, affecting the optimal oxidizer to fuel ratio. Moreover, close investigation showed that the high rate combustion reaction disappears with increasing surface to volume ratio. Nonetheless, thermal analysis performed on films suggests that with the right heating rate, an oxidative complete decomposition still occurs in films, exemplified by the film composition and specific morphological differences in the resulting layers and through analysis of the evolved components. Finally, the discussed synthesis route allows organic free, crystalline MoO3 films to be obtained affording organic solar cell devices with promising current density–voltage characteristics.

Graphical abstract: Combustion deposition of MoO3 films: from fundamentals to OPV applications

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Publication details

The article was received on 04 Sep 2015, accepted on 20 Oct 2015 and first published on 20 Oct 2015


Article type: Paper
DOI: 10.1039/C5RA18001E
Author version available: Download Author version (PDF)
Citation: RSC Adv., 2015,5, 91349-91362
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    Combustion deposition of MoO3 films: from fundamentals to OPV applications

    W. Marchal, C. De Dobbelaere, J. Kesters, G. Bonneux, J. Vandenbergh, H. Damm, T. Junkers, W. Maes, J. D'Haen, M. K. Van Bael and A. Hardy, RSC Adv., 2015, 5, 91349
    DOI: 10.1039/C5RA18001E

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