Characterisation of samarium and nitrogen co-doped TiO2 films prepared by chemical spray pyrolysis

2012 ◽  
Vol 261 ◽  
pp. 735-741 ◽  
Author(s):  
I. Oja Acik ◽  
V. Kiisk ◽  
M. Krunks ◽  
I. Sildos ◽  
A. Junolainen ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
Tio2 Films ◽  
Doped Tio2 ◽  
Chemical Spray ◽  
Co Doped

Optoelectronic Properties of Fluorine and Cobalt Co-Doped Tin Oxide Thin Films Deposited by Chemical Spray Pyrolysis

2019 ◽  
Vol 60 ◽  
pp. 63-75 ◽  
Author(s):  
Naoual Houaidji ◽  
Mejda Ajili ◽  
Baghdadi Chouial ◽  
Najoua Turki Kamoun ◽  
Kenza Kamli ◽  
...  
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Carrier Concentration ◽  
Tin Oxide ◽  
Hall Mobility ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Co Doped

Transparent conducting Cobalt-fluorine co-doped tin oxide (SnO2: (Co, F)) thin filmswere deposited onto preheated glass substrates using the chemical spray pyrolysis method. The ([Co2+]/[Sn4+]) atomic concentration ratio (y)in the spray solution was varied between 0 and 5 at. %. The structural, electrical, optical and photoluminescence properties of these films were studied. It is found that the thin films are polycrystalline with a tetragonal crystal structure corresponding to SnO2 phase having a preferred orientation along the (200) plane. Transmission and reflection spectra reveal the presence of interference fringes indicating thickness uniformity and surface homogeneity of the deposited thin films. The electrical resistivity (ρ), volume carrier concentration density (Nv), surface carrier concentration density (Ns) and Hall mobility (μ) of the synthesized thin films were determined from the Hall Effect measurements in the Van der Paw-configuration and the following results were obtained: n-type conductivity in all deposited films, a low resistivity of 1.16×10-2 Ω.cm, and a high Hall mobility of 15.13×102 cm2.V-1.s-1with Co concentration equals to 3 at. %. These results show that the electrical properties of these thin films where greatly improved making them suitable as ohmic contact in photovoltaic application devices.

Zirconium doped TiO2 thin films deposited by chemical spray pyrolysis

2016 ◽  
Vol 387 ◽  
pp. 539-545 ◽  
Author(s):  
A. Juma ◽  
I. Oja Acik ◽  
A.T. Oluwabi ◽  
A. Mere ◽  
V. Mikli ◽  
...  
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
Tio2 Thin Films ◽  
Doped Tio2 ◽  
Chemical Spray

SYNTHESIS AND CHARACTERIZATION OF NANOCRYSTALLINE Co-DOPED ZnO THIN FILMS PREPARED BY CHEMICAL SPRAY PYROLYSIS FOR OPTOELECTRONIC APPLICATIONS

2021 ◽  
Author(s):  
FAEZ M. HASSAN ◽  
AUS A. NAJIM
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Doping Concentration ◽  
Chemical Spray Pyrolysis ◽  
Co Doping ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Good Transparency ◽  
The Impact ◽  
Co Doped

ZnO:Co thin films were synthesized by the chemical spray pyrolysis (CSP) on glass substrates. Then, investigated the impact of Co doping concentration on its physical properties. XRD analyses show that all films have a polycrystalline structure of hexagonal ZnO. The crystallite size increased from 18[Formula: see text]nm to 25[Formula: see text]nm with Co doping concentrations. Furthermore, the unit cell volume increased from 47.485[Formula: see text]Å to 47.831[Formula: see text]Å, and the Zn–O bond length expanded from 1.97588[Formula: see text]Å to 1.98071[Formula: see text]Å. SEM observations reveal the formation of fiber-like nanostructures in the Co-doped thin films. The diameter of nanofibers increased with Co doping concentration from 260[Formula: see text]nm to 700[Formula: see text]nm. The optical characteristics were studied by the UV-Visible spectrophotometer and manifest the optical transparency vary with Co doping. In addition, the band gap decreases from 3.27[Formula: see text]eV to 2.73[Formula: see text]eV with increasing Co doping concentrations. The conductivity varied from 3.35[Formula: see text]S[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] to 19.88[Formula: see text]S[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] with Co doping concentrations. Empirical models were proposed to evaluate the correlated variables with excellent accuracy with the experimental data. The best result was accomplished in ZnO:Co1% films, where good transparency and high conductivity were achieved.

Highly oriented and conducting ZnO:Ga layers grown by chemical spray pyrolysis

2002 ◽  
Vol 151-152 ◽  
pp. 110-113 ◽  
Author(s):  
K.T. Ramakrishna Reddy ◽  
T.B.S. Reddy ◽  
I. Forbes ◽  
R.W. Miles
Keyword(s):  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
Chemical Spray
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