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Synthesis, characterization and gas sensing performance of spray pyrolysed nanostructured CuInS2 thin films
R. H. Bari and S. B. Patil
Spray pyrolysis technique was employed to deposit nanostructured CuInS2 thin films on to the glass substrates heated at 300 oC. The structural, surface morphology were studied using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM). Elemental composition was conducted using EDAX. The gas sensing performance of the films was tested for various hazardous gases. The sensor (10 min) showed high gas response (S = 890 at 100 oC) on exposure of 50 ppm of H2S and high selectivity against other gases. Its response time was short (7 s) and recovery was also fast (11 s). The results are discussed and interpreted. Keywords: Nanostructured CuInS2, H2S gas sensing, response and recovery time.[Full Text Article]