Resumo

GARNICA PEREZ, Santiago A. D.; GOCHI-PONCE, Y.  e  PARAGUAY-DELGADO, F.. Caracterización de películas delgadas de SnO₂ obtenidas sobre vidrio por aspersión pirolítica intermitente para celdas solares tipo Grätzel. Superf. vacío [online]. 2013, vol.26, n.2, pp.36-41. ISSN 1665-3521.

SnO₂ thin films were deposited on glass substrates by intermittent spray pyrolysis technique, using solution of SnCl₄5H₂O in methanol. Thin films obtained were characterized by X-Ray Diffraction (XRD), UV-VIS spectroscopy, Scanning Electron Microscopy (SEM) and resistivity measurements by Van der Pauw method. According to results, high transmittance in visible light spectrum, cassiterite phase of SnO₂ and uniformity of the film across the substrate were determined. Optical, electrical and structural features obtained in material synthesis are appropriate for electrodes in Grätzel solar cells such as high transmittance (>80%), low resistivity (9.28 x 10^-03 Ω.cm) and high density of carriers (6.24 x 10¹⁹ cm^-3). Thickness of the film was determined based on transmittance spectra and the crystallite size from XRD diffractogram by Scherrer's equation.

Palavras-chave : Thin films; Spray pyrolysis; Solar cells; Cassiterite.

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