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Erschienen in:
19.01.2016
Structural, morphological and optical properties of TiO2:Mn thin films prepared by spray pyrolysis technique
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 5/2016
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Abstract
Mn-doped TiO2 thin films were deposited on glass substrates by spray pyrolysis technique at different manganese doping concentrations \(\left( {y = \frac{{\left[ {Mn^{2 + } } \right]}}{{\left[ {Ti^{4 + } } \right]}} = 0, 2, 4, 6\, and\,10\;\% } \right)\). X-ray diffraction (XRD), atomic force microscopy, scanning electron microscopy, spectrophotometry and spectrofluorimetry techniques were used in order to study the effect of Mn doping on the structural, morphological and optical properties of TiO2 thin films. It is found that better film crystallinity was obtained for Mn doping ratio of about 2 at%. Morphological studies revealed that the grown layers exhibited uniform and compact surfaces. An indirect band gap of about 3.44 eV was obtained according to the optical studies. Film thickness, refractive index and extinction coefficient were determined using envelope method. Both Wemple–Di Domenico single oscillator and Spitzer–Fan models were used to study the effect of manganese doping on some optical constants. All photoluminescence spectra showed several emissions in both UV and visible regions.