Effects of annealing on morphological, structural and electrical properties of thermally evaporated WO3 thin films
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Dosyalar
Tarih
2012
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Academic Press Ltd- Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Tungsten trioxide (WO3) thin films were prepared by thermal evaporation method onto quartz substrates at room temperature. Effect of annealing temperature (from 200 to 800 degrees C) to morphology, crystallographic structure and electrical properties were investigated. In order to investigate the temperature dependant resistivity properties of the films dark current-voltage measurements were done at the temperatures of 30, 60, 90, 120 and 150 degrees C. From the AFM pictures it is seen that the increasing annealing temperature causes an increase in grain sizes. At elevated temperatures the grains combine to each other and thus form continuous and homogenous surfaces. From the XRD patterns it was seen that the as-prepared and annealed films at 200, 300, 310 and 320 degrees C were amorphous. On the other hand at 330 degrees C and higher temperatures the films were found as in crystallized structures (monoclinic phase). From the current-voltage measurements it was seen that the contacts areohmic and the current increased with increasing temperatures. From the calculated values it was seen that the produced films shows good semiconducting nature. (C) 2012 Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Thin film, Thermal evaporation, AFM, XRD
Kaynak
Superlattices and Microstructures
WoS Q Değeri
Q2
Scopus Q Değeri
N/A
Cilt
52
Sayı
2
