Structural, Optical and Gas Sensing Properties of TiO2-MoO3 Thin Films

Authors

P. V. Kala, Department of Basic Sciences & Humanities, Vignan’s Lara Institute of Technology & Science, Vadlamudi – 522 213.Follow
B. T. Rao, Laser Disvision, Raja Ramanna Centre for Advanced Technology, Indore – 452 013.Follow
K. Srinivasarao, Department of Applied Sciences & Humanities, Sasi Institute of Technology & Engineering, Tadepalligudem – 534 101, Andhra Pradesh, India.Follow

Abstract

Thin films of TiO2 - MoO3 were deposited on quartz glass, Silicon (100) substrates by dc magnetron sputtering at two substrate temperatures of 300 K and 600 K and at a fixed sputtering pressure of 5 Pa and sputtering power of 50 W respectively. The atomic percent of (at.%) titanium (Ti) in composite is found to be 1 and 2.4. The deposited films were characterized by X-ray Photo Electron Spectroscopy (XPS) and Optical Transmittance studies. The optical transmittance of the MoO3 films deposited at 300 K, 5 Pa is 60 % and increases with increasing Ti at.%. The energy gap of the films is 3.7 eV and increases with increasing Ti at. %. The optical transmittance is further increasing when the films were deposited at 600 K, reaching 98 % and decreases with increasing Ti at. %. The energy gap of the film is 3.94 eV and decreases with increasing Ti at. %. The composite films showed good sensitivity and fast response time when exposed to CO.

Recommended Citation

V. Kala, P.; T. Rao, B.; and Srinivasarao, K. (2019) "Structural, Optical and Gas Sensing Properties of TiO2-MoO3 Thin Films," International Journal of Thin Film Science and Technology: Vol. 8 : Iss. 3 , PP -.
Available at: https://digitalcommons.aaru.edu.jo/ijtfst/vol8/iss3/9