Effect of Thickness on Nanostructured SnO2 Thin Films by Spray Pyrolysis as Highly Sensitive H2S Gas Sensor

• DOI: 10.1166/jnn.2012.6424
• Publication Date: 2012-09-16T22:18:59Z
• Authors: G. E. Patil; D. D. Kajale; V. B. Gaikwad; G. H. Jain
• Keywords: Nanocrystalline material; Tetragonal crystal system

Nanostructured SnO2 thin films were prepared by spray pyrolysis technique onto glass substrates with different thickness varying quantity of precursor solution. The structural, optical and electrical properties these have been studied. crystallographic structure the was studied X-ray diffraction (XRD). It is found that are tetragonal (110) orientation. grain size increases thickness. Atomic Force Microscopy (AFM) showed nanocrystalline nature porous nature. increased 14 to 29 nm increase in film studies on show direct band gap value decreases from 3.75 3.50 eV. temperature dependence conductivity activation energies calculated conductance characteristics. nanostructured used as sensing layers for resistive gas sensors. investigated. response towards H2S determined at an operating 150 degrees C. sensitivity strongly depending surface morphology films.