scholarly journals Crystalline phase evolution in nanostructured copper sulfide thin films prepared by spray pyrolysis method: the effect of annealing

2017 ◽  
Vol 35 (3) ◽  
pp. 673-680 ◽  
Author(s):  
Roshanak Rafiei Nazari ◽  
Hoda Enayati Taloobaghi ◽  
Hosein Eshghi
Keyword(s):  
Thin Films ◽  
Substrate Temperature ◽  
Physical Properties ◽  
Spray Pyrolysis ◽  
Copper Sulfide ◽  
Phase Evolution ◽  
Spray Pyrolysis Method ◽  
Spectra Analysis ◽  
Glass Substrates ◽  
Pyrolysis Method

AbstractIn this study, physical properties of copper sulfide thin films deposited on glass substrates by spray pyrolysis method at different temperatures (260 °C, 285 °C and 310 °C) were investigated. The influence of annealing time on the physical properties of grown layers was also studied. According to FESEM images, the sizes of the compact copper sulfide grains were varied from about 100 nm to 60 nm. Hall effect and resistivity measurements confirmed that all samples had p-type conductivity. The XRD patterns showed that, together with the dominant digenite phase (Cu1.8S) in all samples, the copper-rich phases also appeared as a result of increasing substrate temperature. The optical UV-Vis spectra analysis showed that due to increasing the substrate temperature, the band gap of the layers was reduced from about 2.4 eV to 2.0 eV. We found that as a result of annealing at 400 °C for 1.5 h in Ar atmosphere, the sample which was initially grown at 310 °C with the highest copper content, totally transformed into the polycrystalline monoclinic chalcocite phase (Cu2S) with 3D nanoporous architecture.

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)

scholarly journals Study of Physical Properties of Zn1-xAgxO Thin Films Deposited by Chemical Spray Pyrolysis

2018 ◽  
Vol 34 (5) ◽  
pp. 2667-2670 ◽  
Author(s):  
Bhawna Sarwan ◽  
Aman Deep Acharya
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Physical Properties ◽  
Spray Pyrolysis ◽  
Optical Measurement ◽  
Filler Concentration ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Pyrolysis Method ◽  
Chemical Spray

To investigate the influence of Ag concentration on physical properties, the Zn1-xAgxO films were synthesized by chemical spray pyrolysis method. The crystallite size was found to decrease for low concentration of Ag then increase upto 50 nm with increase in Ag content. AFM measurement implies that the roughness and grain size increased due to coalescence of petite grains into larger size. In optical measurement, band gap is found to be decreased with increase in filler concentration.

Optical Properties of Zinc Oxide (ZnO) Thin Films Prepared by Spray Pyrolysis Method

2014 ◽  
Vol 895 ◽  
pp. 226-230 ◽  
Author(s):  
B.V. Rajendra ◽  
Vinayak Bhat ◽  
Dhananjaya Kekuda
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Band Gap Energy ◽  
Zno Thin Films ◽  
Spray Pyrolysis Method ◽  
Glass Substrates ◽  
Pyrolysis Method ◽  
Substrate Temperatures

Zinc oxide (ZnO) thin films were deposited on the glass substrates using Zinc acetate dehydrate solution through spray pyrolysis method. The films were obtained by spraying 0.05M concentrated solution at a rate of 0.5ml for 10 min and were deposited at different substrate temperatures ranging from 473K to 673K. A comprehensive study was carried out to realize the effect of substrate temperatures and subsequent annealing on optical properties of the ZnO thin films. It was observed that the band gap energy decreases with increases the substrate temperature and annealing. Optical constants such as the refractive indexnand extinction coefficientkwere determined from transmittance spectrum in the ultravioletvisible (UVVIS) regions by Swanepoel envelope method and crystallinity was confirmed by Urbach tail and atomic force microscope images.

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