Abstract
The present paper describes an opto-electronic humidity sensor based on thin film of zinc oxide prepared by pulsed laser deposition method. Being optical in nature it gives electromagnetic disturbance-free monitoring. The sensing element is a right-angled isosceles prism with its base coated with ZnO thin film. Films have been characterized by XRD, SEM, and optical transmission. Film grown with substrate at room temperature is amorphous whereas that grown at elevated temperature is single crystalline with grain size 38.52 nm. Film deposited at room temperature is sensitive to humidity over a wide range i.e. 5–90RH% while that deposited at elevated temperature is found to be insensitive to humidity. The sensor shows better sensitivity for higher range of humidity. The response and recovery time of the sensor element have also been evaluated. This sensor configuration can be used for on-line applications and in-situ monitoring.
Similar content being viewed by others
References
P.D. Harris, M.K. Andrews, Sensors VI Technology and Applications (Institute of Physics Publishing, U. K.), p. 435
R. Anchisini, G. Faglia, M.C. Gallazzi, G. Sberveglieri, G. Zerbi, Sensor Actuat. B 35–36, 99 (1996)
J. Ying, C. Wan, P. He, Sensor World 12, 25 (1997)
W.-P. Tai, J.-G. Kim, J.-H. Oh, Y.-S. Kim, Sensor Actuat. B 105, 199 (2005)
P.M. Faia, C.S. Furtado, A.J. Ferreira, Sensor Actuat. B 101, 183 (2004)
P. Misra, R.K. Shukla, L.M. Bali, C. Gupta, G.C. Dubey, Sensor Actuat. B 94, 210 (2003)
B.C. Yadav, R.K. Shukla, Ind. J. Pure Appl. Phys. 41, 681 (2003)
B.C. Yadav, R.K. Shukla, L.M. Bali, Ind. J. Pure Appl. Phys. 43, 51 (2005)
L. Xu, J.C. Fanguy, K. Soni, S. Tao, Opt. Lett. 29, 1191 (2004)
S. Muto, O. Suzuki, T. Amano, M. Morisawa, Meas. Sci. Technol. 14, 746 (2003)
R. Jindal, S. Tau, J.P. Singh, P.S. Gaikwad, Opt. Eng. 41(5), 1093 (2002)
Z.A. Ansari, R.N. Karekar, R.C. Aiyer, Thin Solid Films 305, 330 (1997)
A.M.E. Suresh Raj, C.M. Magadalne, K.S. Nagaraja, Phys. Stat. Sol. (A) 191, 230 (2002)
G. Montesperelli, A. Pumo, G. Gusmano, A. Bearzotti, A. Montenero, G. Gnappi, E. Traversa, Sensor Actuat. B 25, 705 (1995)
M. Bayhan, T. Hashemi, A.W. Brinkman, J. Mater. Sci. 32, 6619 (1997)
L.M. Bali, A. Srivastava, R.K. Shukla, A. Srivastava, Opt. Eng. 38(10), 1715 (1999)
O. Garcia-Martinez, R.M. Vojas, E. Vila, J.J. Martin De Vidales, Solid State Ionics 63–65, 442 (1993)
H. Sawada, R. Wang, A.W. Sleight, J. Solid State Chem. 122, 148 (1996)
J.R. Brown, P.W. Haycock, L.M. Smith, A.C. Jones, E.W. Williams, Sensor Actuator 63(1), 109 (2000)
K. Arshak, K. Twomey, Sensors 2, 205 (2002)
Acknowledgment
Anchal S. and RKS thank University Grants Commission, New Delhi, India for financial assistance. The authors also thank Dr. L. M. Kukreja and P. Misra, Thin Film Lab, RRCAT, Indore, India for providing facilities for growing the films. Authors are thankful to the anonymous reviewer for the insightful comments.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Dixit, S., Srivastava, A., Shukla, R.K. et al. Pulsed laser deposited ZnO films and their humidity sensing behavior. J Mater Sci: Mater Electron 19, 788–792 (2008). https://doi.org/10.1007/s10854-007-9414-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10854-007-9414-2