Effects of thermal oxidation temperature on vacuum evaporated tin dioxide film


Cakmak H. M. , Cetinkara H. A. , Kahraman S., Bayansal F., TEPE M. , Guder H. S. , ...Daha Fazla

SUPERLATTICES AND MICROSTRUCTURES, cilt.51, ss.421-429, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 51 Konu: 3
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.spmi.2012.01.006
  • Dergi Adı: SUPERLATTICES AND MICROSTRUCTURES
  • Sayfa Sayıları: ss.421-429

Özet

In order to investigate the effect of thermal oxidation temperature on tin dioxide (SnO2), tin dioxide films were obtained on quartz substrates by vacuum evaporation of tin metal. The films were characterized by X-ray diffraction (XRD) analyses, scanning electron microscopy (SEM), temperature dependent electrical resistivity measurement and optical absorption spectroscopy. The SEM images showed that the films are dense, continuous and are composed of nanoparticles and particle sizes are increased after thermal oxidation. From the X-ray measurement results, the films indicated two strong reflection peaks of tetragonal structure in the orientations of (101) and (200) at 20 = 33.8 degrees and 37.95 degrees, respectively. Intensity of the peaks increased with increasing thermal oxidation temperature. We found resistivity values of about 10(-4) Omega-cm. Optical absorption spectra of the films in the UV-Vis spectral range revealed that optical band gap (E-g) value of the films increases with increasing thermal oxidation temperature. (C) 2012 Elsevier Ltd. All rights reserved.