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Photoluminescent CaCu3Ti4O12-Based Thin Films Synthesized by a Sol–Gel Method

Authors

  • Rodrigo Parra,

    Corresponding author
    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
    2. Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET-UNMdP, B7608FDQ Mar del Plata, Argentina.
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  • Ednan Joanni,

    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
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  • José W. M. Espinosa,

    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
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  • Ronald Tararam,

    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
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  • Mário Cilense,

    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
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  • Paulo R. Bueno,

    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
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  • Jose A. Varela,

    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
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  • Elson Longo

    1. Departamento de Físico-Química, Instituto de Química, Universidade Estadual Paulista (UNESP), 14800-900 Araraquara, SP, Brasil.
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  • D. Sun—contributing editor

  • The financial aid for this research is being provided by FAPESP, CNPq and Capes (Brazil) and SeCyT and CONICET (Argentina).

†Author to whom correspondence should be addressed. e-mail: rparra@fi.mdp.edu.ar

Abstract

Results on the characterization of photoluminescent CaCu3Ti4O12-based films, prepared from a sol–gel precursor and heat treated at 700°C, are reported for the first time. The samples showed two emission bands at 554 and 800 nm when excited with a 488 nm Ar-ion laser. The photoluminescent emission measured at room temperature in thin films was attributed to complex vacancy clusters. The films consisted of CaCu3Ti4O12 with traces of TiO2, CuO, and CaTiO3 and showed porous structures with an average particle size of 50 nm under atomic force microscopy resolution.

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