Synthesis of nanocrystalline ceria thin films by low-temperature thermal decomposition of Ce-propionate

P. Roura, J. Farjas, S. Ricart, M. Aklalouch, R. Guzman, J. Arbiol, T. Puig, A. Calleja, O. Peña-Rodríguez, M. Garriga, X. Obradors

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    28 Citations (Scopus)

    Abstract

    Thin films of Ce-propionate (thickness below 20 nm) have been deposited by spin coating and pyrolysed into ceria at temperatures below 200 °C. After 1 h of thermal treatment, no signature of the vibrational modes of Ce-propionate is detected by infrared spectroscopy, indicating that decomposition has been completed. The resulting ceria films are nanocrystalline as revealed by X-ray diffraction (average grain size of 2-2.5 nm) and confirmed by microscopy. They are transparent in the visible region and show the characteristic band gap absorption below 400 nm. A direct band gap energy of 3.50 ± 0.05 eV has been deduced irrespective of the pyrolysis temperature (160, 180 and 200 °C). © 2011 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)1949-1953
    JournalThin Solid Films
    Volume520
    Issue number6
    DOIs
    Publication statusPublished - 1 Jan 2012

    Keywords

    • Ceria
    • Cerium propionate
    • Crystal microstructure
    • Optical absorption
    • Pyrolysis
    • Thermal decomposition
    • Thermogravimetry

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