scholarly journals Thickness dependent electrical properties of CdO thin films prepared by spray pyrolysis method

1999 ◽  
Vol 22 (6) ◽  
pp. 953-957 ◽  
Author(s):  
L C S Murthy ◽  
K S R K Rao
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Pyrolysis Method ◽  
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 Structural, optical, and electrical properties of Yb-doped ZnO thin films prepared by spray pyrolysis method

2011 ◽  
Vol 109 (3) ◽  
pp. 033708 ◽  
Author(s):  
I. Soumahoro ◽  
G. Schmerber ◽  
A. Douayar ◽  
S. Colis ◽  
M. Abd-Lefdil ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Spray Pyrolysis ◽  
Zno Thin Films ◽  
Spray Pyrolysis Method ◽  
Optical And Electrical Properties ◽  
Pyrolysis Method ◽  
Doped Zno

Ni-Doped ZnO Thin Films Deposited by Pneumatic Spray Pyrolysis

2019 ◽  
Vol 27 ◽  
pp. 21-29
Author(s):  
Labidi Herissi ◽  
L. Hadjeris ◽  
M.S. Aida ◽  
S. Azizi ◽  
A. Hafdallah ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Spray Pyrolysis ◽  
Nickel Content ◽  
Zno Thin Films ◽  
Spray Pyrolysis Method ◽  
Pyrolysis Method ◽  
Chloride Hexahydrate ◽  
Structural And Electrical Properties ◽  
Doped Zno

The objective of the present work is the study the Ni concentration effect on the optical, structural and electrical properties of ZnO:Ni thin films deposited by pneumatic spray pyrolysis method. Un-doped and Ni-doped ZnO thin films were prepared from zinc acetate dihydrate and nickel chloride hexahydrate dissolved in distilled water onto glass substrates by pneumatic spray pyrolysis method. Solution concentration, substrate temperature and nozzle-substrate distance were kept constant during all deposition processes. Effect of nickel content on the optical, structural and electrical properties of as-prepared films obtained was investigated by UV–Vis-NIR spectrophotometry, X-ray diffraction and four-point probe technique. The results indicate that the deposited films are well adherent to the substrates, present surface roughness and have a preferential growth in the (002) direction. The observed transmittance in the visible region was situated between 60% and 70%. For Ni-doped ZnO, there are two separate phases. The Urbach energy, grain size, and electrical conductivity increase with Ni content. The same behavior for both the optical energy gap and the ZnO:Ni lattice parameters.

scholarly journals Study of some structural , optical , Electrical Properties of CdS thin films deposited by chemical Spray Pyrolysis Method

2009 ◽  
Vol 6 (3) ◽  
pp. 519-225
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Spray Pyrolysis ◽  
Energy Gap ◽  
Hall Effect Measurement ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Pyrolysis Method ◽  
Cds Thin Films

In this research we prepared CdS thin films by Spray pyrolysis method on a glass substrates and we study its structural , optical , electrical properties .The result of (X-Ray ) diffraction showed that all thin films have a polycrystalline structure , The relation of the transmission as a function of wavelength for the CdS films had been studied , The investigated of direct energy gap of the CdS its value is (2.83 eV). In Hall effect measurement of the CdS we find the charge carriers is p – type and Hall coefficient 1157.33(cm3/c) ,Hall mobility 6.77(cm2/v.s)

Sign in / Sign up

Export Citation Format

Share Document