Characterization of WO3 thin films deposited by spray pyrolysis technique and its role in gas sensing

The work investigated in this paper focused on the fabrication of WO3 films by spray pyrolysis technique, and different analyses were made to find optimized samples for studying properties suitable application gas sensing. substrate temperature is most important parameter among other parameters synthesis thin hence deposited glass substrates maintaining at 350 ºC, 450 550 650 °C using compressed air as a carrier gas. influence structural, morphological, compositional, optical has been justified XRD data. Good enhanced crystallinity observed film ºC. nonconventional studied investigations confirmed past research work. manipulation surface morphology with deposition temperatures monitored. Only characteristic peaks W O are present fabricated films. activity about 70 80 % selected sample visible region (300 1200 nm) found. selective absorption light ultraviolet checked. obtained IR bands inter bridge stretching bending modes W-O O-W-O. A high response towards ammonia compared test gases exhibited. repeatability NH3 over three periodic sensing cycles, response, recovery time also discussed. From all studies, it suggested that have used health care field detect toxic