Shobhna DIXIT, Anchal SRIVASTAVA, R. K. SHUKLA^*, and Atul SRIVASTAVA

Department of Physics, University of Lucknow, Lucknow 226007, India

(Received January 31, 2007; Accepted May 9, 2007)

Sensitivity of zinc oxide film to humidity is studied using prism based opto-electronic sensor configuration. Film is deposited on the base of the prism by screen printing. The film is crystalline in nature and has micropores on its surface which is suitable for humidity sensing. The sensing mechanism, here, is the modulation in emergent light intensity with change in ambient humidity. Response of the sensor configuration is repeatable and the configuration is found to be sensitive to relative humidity (RH%) ranging from 5 to 90 RH%.

Key words: humidity sensitivity, zinc oxide, screen printing, opto-electronic

^*E-mail address: rajeshkumarshukla_100@yahoo.co.in