Issue 84, 2014

Highly selective and sensitive CdS thin film sensors for detection of NO2 gas

Abstract

We demonstrate the preparation of cadmium sulfide (CdS) thin films via a facile chemical bath deposition method. The CdS films have been characterized by various techniques, such as, X-ray diffraction (XRD), energy dispersive X-ray (EDAX), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Gas sensing performance of CdS thin films was tested at room temperature (38 °C) for oxidizing (NO2, Cl2) and reducing gases (H2S, NH3, C2H5OH, CH3OH). CdS films were found to be highly selective and sensitive to NO2 with a maximum response of 61% at 200 ppm with a fast response time of 50 s and 81% stability. Furthermore, the sensor is able to detect up to low (5 ppm) concentration of NO2 gas with a reasonable response (5%). The plausible mechanism(s) of NO2 sensing has been discussed.

Graphical abstract: Highly selective and sensitive CdS thin film sensors for detection of NO2 gas

Article information

Article type
Paper
Submitted
02 Jul 2014
Accepted
10 Sep 2014
First published
12 Sep 2014

RSC Adv., 2014,4, 44547-44554

Author version available

Highly selective and sensitive CdS thin film sensors for detection of NO2 gas

S. T. Navale, A. T. Mane, M. A. Chougule, N. M. Shinde, J. Kim and V. B. Patil, RSC Adv., 2014, 4, 44547 DOI: 10.1039/C4RA06531J

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