Optical Properties of Cadmium Sulphide (CdS) Thin Films Spin-Coated on Glass Substrates

2021 ◽  
Vol 14 (1) ◽  
pp. 49-58
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Extinction Coefficient ◽  
Spin Coating ◽  
Glass Substrate ◽  
Annealing Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sem Image ◽  
Cds Thin Films

Abstract: CdS thin films were synthesized on a glass substrate using spin coating method. The effects of annealing temperature on the optical properties of the prepared CdS films were investigated for different annealing temperatures of 200, 300 and 400 °C. Cadmium acetate, thiourea and ammonia were used as the source materials for the preparation of the thin films. The elemental composition, morphological, optical and structural properties of the films obtained by spin coating were investigated using Energy Dispersive X- ray Spectroscopy (EDAX), Scanning Electron Microscope (SEM), UV Spectrophotometry and X-ray diffraction (XRD) respectively. The SEM image of the unannealed film shows a spherical morphology and an irregular pattern without any void. It also shows that the film covers the substrate well. Annealing leads to an increase in transmittance with the highest transmission of 87% observed for the film annealed at 400oC. With increase in annealing temperature, optical parameters like extinction coefficient and dielectric constants show a reduction, while refractive index and skin depth exhibit an improvement. The absorption coefficient increases with increasing photon energy in the range 3.6 to 4.0 eV. The band gap values of the CdS thin film samples were found to be in the range between 3.14 eV and 3.63 eV. The bandgap is somewhat greater than the value of bulk CdS due to quantum size effect. EDX image confirmed the presence of Cadmium and Sulphur in the prepared CdS films. Annealing did not significantly change the extinction coefficient. The X-ray diffraction confirms the cubic structure of CdS deposited on glass substrate, where reflections from (111), (200), (220) and (311) planes are clearly shown with a preferential orientation along (111) plane. Debye-Scherer equation was used to determine the crystallite size of the most intense plane (111) and the value was found to be 8.4 nm. Keywords: SEM image, Spin coating, Surface morphology, Optical properties, Annealing.

scholarly journals The structure and optical properties of organic semiconductor bulk hetrojunction blend (NiPcTs/Alq3) thin films

2019 ◽  
Vol 15 (33) ◽  
pp. 40-48
Author(s):  
Atyaf H. Kadhum
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Optical Properties ◽  
Spin Coating ◽  
Annealing Temperature ◽  
Bulk Heterojunction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Visible ◽  
Xrd Patterns

The effect of heat treatment on the optical properties of the bulk heterojunction blend nickel (II) phthalocyanine tetrasulfonic acid tetrasodium salt and Tris (8-hydroxyquinolinato) Aluminum (NiPcTs/Alq3) thin films which prepared by spin coating was described in this study. The films coated on a glass substrate with speed of 1500 rpm for 1.5 min and treated with different annealing temperature (373, 423 and 473) K. The samples characterized using UV-Vis, X ray diffraction and Fourier transform Infrared (FTIR) spectra, XRD patterns indicated the presence of amorphous and polycrystalline blend (NiPcTs/Alq3). The results of UV visible shows that the band gap increase with increasing the annealing temperature up to 373 K and decreases with increase the annealing temperature to (423, 473)K respectively.

Synthesis, Characterization and Optical Properties of PLA / P3HT Blends Thin Films

2021 ◽  
Vol 19 (5) ◽  
pp. 132-138
Author(s):  
Maan Abd-Alameer Salih ◽  
Q.S. Kareem ◽  
Mohammed Hadi Shinen
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spin Coating ◽  
Ring Opening ◽  
Energy Gap ◽  
Ring Opening Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Conductivity Increase ◽  
Ft Ir

In this exploration Poly lactic corrosive (PLA) was orchestrated the ring-opening polymerization Poly lactic corrosive (PLA) blended with poly(3-hexylthiophene) (P3HT) which prepared by solution. Blends thin films Synthesis by spin coating technique and using Tetrahydrofuran (THF) as solvent. PLA powder was 'characterized by' 'X-ray' 'diffraction', '(FT-IR)'. pure Optical properties (PLA), (PLA)/P3HT blends thin films with different percentage of P3HT (0, 1, 2, and 3) wt% were investigated using UV-VS spectroscopy The results showed that the absorption, absorption coefficient, extinction coefficient and conductivity increase with increasing the rate of deformation P3HT, The energy gap decreases with increasing deformation.

scholarly journals Effect of Annealing Temperature On Iron Doped Titanium Dioxide Thin Films Prepared By Spin Coating Technique

2016 ◽  
Vol 2 (02) ◽  
pp. 61
Author(s):  
Mukhtar Effendi ◽  
Bilalodin B
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Spin Coating ◽  
Annealing Temperature ◽  
Spin Coating Technique ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coating Technique ◽  
Doped Titanium Dioxide ◽  
Titanium Dioxide Thin Films

<span>Iron (Fe) doped titanium dioxide (TiO<span>2<span>) thin films have been successfully deposited by <span>using spin coating technique. X-ray diffraction (XRD) and Scanning Electron Microscope <span>(SEM) were employed to characterize the microstructure and crystallite morphology of the <span>films. It was indicated that the rutile crystal orientation appears due to increasing annealing <span>temperature of the thin films. Furthermore, increasing annealing temperature of the thin <span>films yielded an increasing of porosity value which is related to the application on gas <span>sensor films.</span></span></span></span></span></span><br /></span></span></span>

scholarly journals Study the effect by CO2 laser on some optical properties of (Cd) thin film doping by Ni

2008 ◽  
Vol 5 (3) ◽  
pp. 387-390
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Co2 Laser ◽  
Energy Gap ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Before And After ◽  
Cds Thin Films

In this research study the effect of irradiation by (CW) CO2 laser on some optical properties of (Cds) doping by Ni thin films of (1)µm thickness has been prepared by heat evaporation method. (X-Ray) diffraction technique showed the prepared films before and after irradiation are ploy crystalline hexagonal structure, optical properties were include recording of absorbance spectra for prepared films in the range of (400-1000) nm wave lengths, the absorption coefficient and the energy gap were calculated before and after irradiation, finally the irradiation affected (CdS) thin films by changing its color from the Transparent yellow to dark rough yellow and decrease the value absorption coefficient also increase the value of energy gap.

Effects of Annealing Temperature on Optical Properties of Bi3.4Nd0.6Ti3O12 Films by RF Magnetron Sputtering Method

2012 ◽  
Vol 503-504 ◽  
pp. 620-624
Author(s):  
Yan Zou ◽  
Qiu Xiang Liu ◽  
Yan Ping Jiang ◽  
Xin Gui Tang
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Magnetron Sputtering ◽  
Band Gap ◽  
Annealing Temperature ◽  
Rf Magnetron Sputtering ◽  
Constant Thickness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Annealing Temperatures

Bi3.4Nd0.6Ti3O12 (BNT) thin films have been prepared on Si (100) substrate by RF magnetron sputtering method. The crystalline structures were studied by X-ray diffraction. The surface of the films have been observed by SEM. The reflectivity was measured by n & k Analyzer 2000 with the wavelength from 190 to 900 nm. The optical constant, thickness and the forbidden band gap were fitted. The results showed that with the annealing temperatures raised from 600 to 750 °C, the reflectivity index decreased from 2.224 to 2.039, and the forbidden band gap decreased from 3.19 to 2.99 eV. The possible mechanism of the effect of annealing temperature on the optical properties was discussed.

Effects of Vapor CdCl2 Treatment on the Properties of CdS Thin Films Prepared by R.F. Magnetron Sputtering

2011 ◽  
Vol 347-353 ◽  
pp. 3477-3480
Author(s):  
Liang Min Cai ◽  
Jian Huang ◽  
Jia Wei Jiang ◽  
Jun Le ◽  
Wei Min Shi ◽  
...  
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Optical Properties ◽  
Magnetron Sputtering ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Solar Cell Application ◽  
X Ray ◽  
Cds Thin Films ◽  
Cds Films

CdS films were prepared by R.F. magnetron sputtering method. The effects of vapor CdCl2treatment on the properties of CdS films were studied. The vapor CdCl2thermal treatment at different temperature was employed in a CSS device, using CdCl2powder as evaporant. The structural and optical properties of CdS films were investigated by x-ray diffraction (XRD), PL spectra, and transmittance spectra, respectively. The results revealed that the CdS films had a structure of hexagonal wurtzite with a preferential orientation of the (002) plane. A better crystal quality and larger grain size, which are good for the solar cell application, were observed in the CdS samples annealed with CdCl2Subscript text.

scholarly journals PENUMBUHAN DAN KARAKTERISASI LAPISAN TIPIS PbTiO3 YANG DISIAPKAN DENGAN TEKNIK SPIN COATING

Molekul ◽  
2008 ◽  
Vol 3 (1) ◽  
pp. 48
Author(s):  
Bilalodin Bilalodin
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Spin Coating ◽  
Annealing Temperature ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Bulk Powder ◽  
Pbtio3 Thin Film ◽  
Coating Method

The growth of PbTiO3 ferroelectric thin films have successfully done. Thin films were made from bulk (powder) PbTiO3 dissolved in methanol solution. The condensation was mixed during 1 hour to get homogeneous condensation. Thin films were grown above corning substrates by spin coating method. Optimation was done by various of annealing temperature. The physical properties of thin films were characterized by Energi Dispersive X-Ray Spectroscopy (EDS), X-Ray Diffraction (XRD), Scanning and Electron Microscopy (SEM). EDS measurement showed that the stoichiometry composition ratio of Pb/Ti is 1/1.26 at annealing temperature 600oC and 1/1.29 at annealing temperature 700oC. The result of XRD pattern showed that crystal structure of PbTiO3 thin films are tetragonal. The calculated lattice parameters ontained from Chohen Method are a=b= 3.873 Å dan c= 4.130Å. The result of SEM PbTiO3 thin film showed that thin film has globular grain size.

The Effect of Annealing Temperature on the Opt-Electric Properties of Ti:GZO Transparent Conducting OxidesThin Film

2013 ◽  
Vol 284-287 ◽  
pp. 324-328
Author(s):  
Tao Hsing Chen ◽  
Tzu Yu Liao
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Annealing Temperature ◽  
Rf Sputtering ◽  
X Ray Diffraction ◽  
X Ray ◽  
Corning Glass ◽  
Conductive Film ◽  
Corning Glass Substrate

This study utilizes radio frequency magnetron sputtering(RF-sputtering) to deposit GZO transparent conductive film and Ti thin film on the same corning glass substrate, then treats GZO/Ti thin film with rapid thermal annealing. The annealing temperature is 300, 500 and 550°C, respectively. Moreover, the effects of process parameters on resistivity and optical properties are investigated. The deposited rate, microstructure, thickness and Optical transmission of Ti:GZO thin film are performed. For example, the thicknesses of films were determined by -step profilometer. The crystalline characteristics of thin films were investigated by X-ray diffraction (XRD). Ga and Ti concentration in ZnO film were determined by energy dispersive X-ray spectroscopy (EDS). The electrical properties of the Ti:GZO thin films were measured by Four point probe. The optical properties of Ti:GZO thin films were examined using UV–vis spectrophotometer. The results show that the transmittance of Ti:GZO thin film exhibited an excellent transparency in the visible light field. The resistivity of Ti:GZO decrease with increasing annealing temperature.

scholarly journals Synthesis Of Zincoxide Nanorods And Its Application To Humidity Sensor

2015 ◽  
Vol 20 (1) ◽  
pp. 36-39 ◽  
Author(s):  
Indra Bahadur Karki ◽  
Jeevan Jyoti Nakarmi ◽  
Suman Chatterjee
Keyword(s):  
Thin Films ◽  
Glass Substrate ◽  
Humidity Sensor ◽  
Sol Gel ◽  
Zno Nanorods ◽  
X Ray Diffraction ◽  
Humidity Sensors ◽  
X Ray ◽  
Sem Image ◽  
Humid Environment

The present study is concerned the sensing behavior of ZnO nanorods thin films application to humidity sensors. ZnO nanorods were fabricated on a glass substrate by sol-gel spin coating technique. The crystal structure of the resulting thin films was investigated by X-ray diffraction (XRD). Minimum crystalline grain size of this film was found about 5nm. Surface morphology of the film was investigated by Scanning Electron Microscope (SEM). SEM image shows rods like films which are evenly distributed on the surface of the sample. The film on a glass substrate explored for humidity sensing of controlled humid environment by measuring electrical resistance. The resistance falls from M Ohms to K ohms as percentage relative humidity increases from 20 to 90 %.Journal of Institute of Science and Technology, 2015, 20(1): 36-39

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