SnO_2 thin films morphological and optical properties in terms of the Boubaker Polynomials Expansion Scheme BPES-related Opto-Thermal Expansivity psi_(AB)

摘要

In this study, SnO_2 thin films have been grown using spray pyrolysis technique on glass substrates under a substrate temperature (T_s = 440°C). The precursors were methanol CH_4O and anhydrous tin tetrachlo-ride. XRD analyses yielded strong (1 1 0)-(l 0 1 )-(2 0 0) X-ray diffraction peaks which are characteristics to tetragonal crystals. Atomic Force Microscopy (AFM) analyses showed the existence of clusters with particular pyramidal shapes. The main part of this study concerns the optical measurements of trans-mittance T(lambda) and reflectance R(lambda) spectra inside 250-1800 nm domain. Conjoint optical and thermal properties were deduced using the Amlouk-Boubaker Opto-Thermal Expansivity psi_(AB). The obtained value: psi_(AB) approx = 23.4 m~3 s~(-1) helped situating the performance of the as-grown SnO_2 compound among most known PV-T oxides like ZnO and TiO_2.