Influence of substrate temperature on ethanol sensing properties of CdO thin films prepared by facile spray pyrolysis method

2014 ◽  
Vol 26 (2) ◽  
pp. 955-961 ◽  
Author(s):  
K. Sankarasubramanian ◽  
M. Sampath ◽  
J. Archana ◽  
K. Sethuraman ◽  
K. Ramamurthi ◽  
...  
Keyword(s):  
Thin Films ◽  
Substrate Temperature ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Sensing Properties ◽  
Pyrolysis Method ◽  
Influence Of Substrate ◽  
Ethanol Sensing ◽  
Cdo Thin Films

scholarly journals Optical and Electrical Characteristics of CdO thin films deposited by Spray Pyrolysis Method

1970 ◽  
Vol 32 (1) ◽  
pp. 97-105 ◽  
Author(s):  
MM Islam ◽  
MR Islam ◽  
J Podder
Keyword(s):  
Thin Films ◽  
Activation Energy ◽  
Band Gap ◽  
Spray Pyrolysis ◽  
Cadmium Oxide ◽  
Optical Absorption Coefficient ◽  
Spray Pyrolysis Method ◽  
Pyrolysis Method ◽  
Sem Micrograph ◽  
Cdo Thin Films

Cadmium oxide (CdO) thin films have been deposited by a locally developed spray pyrolysis method onto glass substrate at 473K. The optical and electrical properties of the as-deposited and annealed films are studied in details. The surface morphology of the samples was studied by scanning electron microscopy (SEM). The SEM micrograph of as-deposited film shows uniform deposition over the substrate well. The optical absorption coefficient (α) of the CdO films was determined from transmittance spectra in the range of wavelength 450 - 650nm. For different thicknesses (130nm ~ 380nm) of as-deposited films, the direct band gap is found in the range of 2.40 ~2.51 eV and indirect band gap in the range of 1.97 ~ 2.20 eV. Resistivity (ρ) of CdO thin film was measured in the temperature range of 303 to 553K. The resistivity of the films of different thickness initially increases with increase in temperature and reaches a maximum at 430K and then decreases with further increase of temperature. The resistivity of the film exhibits metallic behaviour up to 430 K and above that the film behaves like a semiconductor. Activation energy (ΔE) in the semiconductor region is found in the range from 0.049 to 0.075 eV for films of thickness ranging from 160 - 285 nm. Keywords: Spray pyrolysis, CdO, Resistivity, Optical band gap, Activation energy doi: 10.3329/jbas.v32i1.2447 Journal of Bangladesh Academy of Sciences, Vol. 32, No. 1, 97-105, 2008

scholarly journals STUDYING THE EFFECT OF AG DOPING ON THE STRUCTURAL AND OPTICAL PROPERTIES OF CDO THIN FILMS PREPARED BY CHEMICAL SPRAY PYROLYSIS METHOD

2021 ◽  
Vol 03 (02) ◽  
pp. 174-182
Author(s):  
Hiba Qays Khaleel AL QAISY ◽  
Huda M .J. ALI ◽  
Ramiz Ahmad AL-ANSARI
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Ultra Violet ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Slight Variation ◽  
Ag Doping ◽  
Pyrolysis Method ◽  
Cdo Thin Films

In this work, thin films of undoped and Ag-doped CdO with (1and 3) wt.% were prepared by using spray pyrolysis method on glass substrate at of 350ºC with films thicknesses of (160-190) nm using spraying rate and pyrolysis time is 5 ml/min an 5sec respectively. The X-ray diffraction investigated the structural types of the CdO thin films after and before doped by Ag, XRD analysis showed that CdO:Ag films are highly polycrystalline and exhibit cubic crystal structure with (111) preferred orientation. However, the peak for all CdO:Ag films became more intense with a slight variation. The optical properties measure by ultra violet spectra, the optical study shows the spectral transmission and the optical energy band gap increases from 64.77% and 2.50 eV to 71.11% and 2.70 eV respectively depending upon the Ag content in the films, in contrary with the absorbance that increases with the decrease in wavelength and decreases with the increasing Ag doping concentration.

scholarly journals Temperature dependent grain-size and microstrain of CdO thin films prepared by spray pyrolysis method

2011 ◽  
Vol 34 (4) ◽  
pp. 601-605 ◽  
Author(s):  
B. G. Jeyaprakash ◽  
K. Kesavan ◽  
R. Ashok Kumar ◽  
S. Mohan ◽  
A. Amalarani
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Temperature Dependent ◽  
Pyrolysis Method ◽  
Cdo Thin Films
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