TY - JOUR
T1 - ZnO thin films as propane sensors
T2 - Band structure models to explicate the dependence between the structural and morphological properties on gas sensitivity
AU - Gómez-Pozos, Heberto
AU - Karthik, T. V.K.
AU - de la, M.
AU - Barrientos, Abel García
AU - Cortés, Obed Pérez
AU - Vega-Pérez, J.
AU - Maldonado, A.
AU - Pérez-Hernández, R.
AU - Rodríguez-Lugo, V.
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Pure Zinc oxide (ZnO) thin films were deposited on soda-lime glass substrates by utilizing ultrasonic spray pyrolysis technique (USP) and tested them as propane sensors. Propane sensitivity increased with decrease in the substrate temperature and water content in the feedstock solution. XRD analysis confirms that, the (002) directional ZnO which correspond to the hexagonal wurzite structure. Also, formations of rose like and spherical structures were confirmed by the SEM analysis. X-ray photoelectron spectroscopy (XPS) confirms the presence of loosely bound oxygen atoms on the surface of the low water content substrates. Two energy band structure models were proposed and explicated in detail for analyzing the effect of structural, morphological and optical properties of ZnO thin films on propane sensing properties. Highest sensitivity (~10) was obtained for ZnO films deposited with the lowest water content, at a deposition temperature of 400 °C and operated at 200 °C.
AB - Pure Zinc oxide (ZnO) thin films were deposited on soda-lime glass substrates by utilizing ultrasonic spray pyrolysis technique (USP) and tested them as propane sensors. Propane sensitivity increased with decrease in the substrate temperature and water content in the feedstock solution. XRD analysis confirms that, the (002) directional ZnO which correspond to the hexagonal wurzite structure. Also, formations of rose like and spherical structures were confirmed by the SEM analysis. X-ray photoelectron spectroscopy (XPS) confirms the presence of loosely bound oxygen atoms on the surface of the low water content substrates. Two energy band structure models were proposed and explicated in detail for analyzing the effect of structural, morphological and optical properties of ZnO thin films on propane sensing properties. Highest sensitivity (~10) was obtained for ZnO films deposited with the lowest water content, at a deposition temperature of 400 °C and operated at 200 °C.
UR - http://www.scopus.com/inward/record.url?scp=85014483235&partnerID=8YFLogxK
U2 - 10.1016/j.jpcs.2017.02.012
DO - 10.1016/j.jpcs.2017.02.012
M3 - Artículo
SN - 0022-3697
VL - 106
SP - 16
EP - 28
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
ER -