Solid State Science and Technology, Vol. 15, No 1 (2007) 182-190

ISSN 0128-7389

Corresponding Author: elvaswer2001@yahoo.com

182

CO GAS SENSING PROPERTIES OF HETERO-JUNCTION CuO(M)/ZnO

(M=Al, Pd) SENSOR

Elvaswer , R. Omar and I. A. Talib

School of Applied Physics, Faculty of Science and Technology,

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, D.E., Malaysia.

 

ABSTRACT

Hetero-junction of p-type CuO and n-type ZnO semiconductors have been prepared by

mechanically pressing pellets of the two oxides. The pellets were successfully

fabricated by sintering at 800oC for 3 h in air. We have studied the effect of Al2O3 and

PdCl2 doping in CuO on the sensitivity of the CuO(M)/ZnO (M=Al, Pd) towards CO

gas. The I-V characteristic and sensing properties are investigated for samples in 200-

ppm CO, 200-ppm H2 and air. The sample of containing 1-mol% PdCl2 doped with

CuO shows the highest sensitivity to the gas.

 

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