Effect of Additives on Grain Size and Ammonia Sensing Properties of Sprayed Pure and CuO Modified ZnO Thin Films

Authors L.A. Patil1, I.G. Pathan2

1 P.G. Department of Physics, Pratap College, Amalner 425001, India

2 A.S.C. College, Navapur 425418, India

Е-mail plalchand_phy_aml@yahoo.co.in
Issue Volume 3, Year 2011, Number 1, Part 2
Dates Received 04 February 2011, in final form 03 May 2011, published online 08 May 2011
Citation L.A. Patil, I.G. Pathan, J. Nano- Electron. Phys. 3 No1, 433 (2011)
PACS Number(s) 07.07.Df, 81.05.Je
Keywords Grain size control, Zinc oxide (10) , Thin films (60) , Ammonia sensor (2) , Spray pyrolysis (9) .
Nanocrystalline pure and CuO doped ZnO thin films were prepared using spray pyrolysis technique. The zinc nitrate (0.1 M) and copper chloride (0.1 M) were used as starting precursor. These films were characterized by XRD, SEM and EDAX to observe structural, microstructural properties and elemental analysis respectively. It is observed that the average grain size was found to decrease from 190 to 90 nm, as the doping wt % of copper chloride in zinc nitrate solution goes on increasing. The sensing performances of pure and doped films were tested. The sensitivity goes on increasing with decreases in grain size (increase of copper chloride in zinc nitate solution). The maximum sensitivity of S = 35 at 400 °C was found for films prepared from 10 wt % of copper chloride.

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