Effects of pH Value on Performance of CdS Films with Chemical Bath Deposition

2012 ◽  
Vol 557-559 ◽  
pp. 1941-1944 ◽  
Author(s):  
Li Mei Zhou ◽  
Xiao Fei Hu ◽  
Su Mei Wu
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Surface Morphology ◽  
Chemical Bath Deposition ◽  
Ph Value ◽  
Measurement Instrument ◽  
Vital Role ◽  
Height Measurement ◽  
Glass Substrates ◽  
Cds Thin Films

CdS thin films were prepared by chemical-bath deposition (CBD) from a bath containing thiourea, acetic cadmium, ammonia and ammonium acetate in aqueous solution onto glass substrates at 80°C with stirring. The influence of pH value on the surface morphology and optical properties of the CdS thin films was investigated. Step height measurement instrument, scanning electron microscopy (SEM), X-ray diffraction (XRD), spectrophotometer and digital four-point probe resistance measurement were used to characterize their thickness, surface morphology, crystal structure, electrical and optical properties. Uniform CdS thin films were obtained when pH=11.6. There are obvious diffraction peaks at 26.04° when pH is 11.6. The transmittance increases as the pH values increase. The experiment show that pH value play a vital role in the properties of the CdS thin films.

Properties of CdS Thin Films Grown by Chemical Bath Deposition as a Function of Bath Temperature

2009 ◽  
Vol 609 ◽  
pp. 243-247 ◽  
Author(s):  
H. Moualkia ◽  
S. Hariech ◽  
M.S. Aida
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Band Gap ◽  
Chemical Bath Deposition ◽  
Bath Temperature ◽  
Band Gap Energy ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Cds Thin Films ◽  
Direct Band

The present work deals with the preparation and characterization of cadmium sulfur (CdS) thin films. These films are prepared by chemical bath deposition on the well cleaned glass substrates. The thickness of the samples was measured by using profilometer DEKTAK, structural and optical properties were studied by X-ray diffraction analysis, and UV-visible spectrophotometry. The optical properties of the films have been investigated as a function of temperature. The band gap energy and Urbach energy were also investigated as a function of temperature. From the transmittance data analysis the direct band gap ranges from 2.21 eV to 2.34 eV. A dependence of band gap on temperature has been observed and the possible raisons are discussed. Transmission spectra indicates a high transmission coefficient (75 %). Structural analysis revealed that the films showed cubic structure, and the crystallite size decreased at a higher deposition temperature.

scholarly journals Synthesis and Study of CdS Thin Films Prepared with Different KMnO4 Activation Time

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Sarveswaran Thangarajan ◽  
Gopinathan Chellachamy ◽  
Saravanakumar Kulendran ◽  
Pandi Pitchai ◽  
Mahalakshmi Kandasamy
Keyword(s):  
Thin Films ◽  
Chemical Bath Deposition ◽  
Ph Value ◽  
Deposition Process ◽  
Activation Time ◽  
Glass Substrates ◽  
Cds Thin Film ◽  
Cds Thin Films ◽  
Cbd Method ◽  
Cds Film

The growth and properties of cadmium sulfide (CdS) thin films were prepared in a controlled manner using chemical bath deposition (CBD) method for different KMnO4 activation time such as 5 min, 10 min, 15 min, 20 min, 25 min, and 30 min on glass substrates. CdS thin films are deposited on KMnO4 activated glass substrates at 85°C with pH value of 10 for 30 min deposition time. In the chemical bath deposition (CBD) technique, KMnO4 activation time plays an important role in the growth of the CdS film. The structure of the CdS film changes with respect to the rate of deposition. The size of the particles is affected by the nucleation rate if the solution does not contain the constant number of Cd2+ and S2− ions throughout the deposition process. This change in structure of CdS is confirmed by the XRD, SEM, and AFM analysis, and the ion-by-ion nucleation growth is also examined. The optical property of the prepared CdS thin film is scrutinized using UV-Vis-NIR absorption analysis.

Optical and Structural Properties of Nanocrystalline CdS Thin Films Grown by Chemical Bath Deposition

2011 ◽  
Vol 364 ◽  
pp. 65-69
Author(s):  
Ayush Khare ◽  
R. B. Sahu
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Structural Properties ◽  
Chemical Bath Deposition ◽  
Annealing Temperature ◽  
Structural Parameters ◽  
Transmission Spectra ◽  
Glass Substrates ◽  
Cds Thin Films ◽  
Cds Films

Nanocrystalline cadmium sulfide thin films are prepared using chemical bath deposition (CBD) technique in aqueous alkaline bath at 60 °C and their subsequent condensation on glass substrates. Effects of annealing on structural, morphological and optical properties are presented and discussed. The best annealing temperature for CBD grown CdS films is found to be 350 °C from optical properties. The optical and structural properties of CdS films are found to be sensitive to annealing temperature and are described in terms of XRD, SEM, transmission spectra and optical studies. The structural parameters such as crystallite size have been evaluated through XRD while SEM micrographs exhibit ordering of grains upon annealing. The transmission spectra shift towards higher wavelength upon annealing indicating increase in crystallinity. Annealing over 350 °C is found to degrade the external structure and optical properties of the film.

Growth of CdS thin films on indium coated glass substrates via chemical bath deposition and subsequent air annealing

2014 ◽  
Vol 320 ◽  
pp. 309-314 ◽  
Author(s):  
Biswajit Ghosh ◽  
Kamlesh Kumar ◽  
Balwant Kr Singh ◽  
Pushan Banerjee ◽  
Subrata Das
Keyword(s):  
Thin Films ◽  
Chemical Bath Deposition ◽  
Coated Glass ◽  
Glass Substrates ◽  
Cds Thin Films

Optical Properties and Surface Morphology of PMMA: TiO2 Nanocomposite Thin Films

2011 ◽  
Vol 364 ◽  
pp. 105-109 ◽  
Author(s):  
Ismail Lyly Nyl ◽  
Ahmad Fairoz Aziz ◽  
Zulkefle Habibah ◽  
Musa Mohamed Zaihidi ◽  
Mohd Hanapiah Abdullah ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Surface Morphology ◽  
Sol Gel ◽  
The Other ◽  
Optical Transparency ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Nanocomposite Thin Films ◽  
Triton X

Sol-gel spin coated PMMA:TiO2 nanocomposite thin films on glass substrates were studied by comparing two types of the sol-gel solutions. Two types of PMMA:TiO2 nanocomposite sol-gel solutions were prepared; one using Degusa (P25), and the other one is using self-prepared TiO2 powder. The self-prepared nanosized TiO2 powder is obtained by drying the TiO2 sol-gel using solvothermal method followed by grinding the TiO2 crystal using ball miller. Triton-X was used as surfactant to stabilize the composite. Besides comparing the nanocomposite solution, we also studied the effect of the thin films thickness on the optical properties and their surface morphology. The optical properties and surface morphology were measured with UV-VIS spectrometer and atomic force microscopy (AFM). The result showed that nanocomposite PMMA with self-prepared TiO2 give high optical transparency than that of with Degusa (P25). The results also indicate that as the thickness is increased the optical transparency are decreased. Both AFM images showed that the agglomerations of TiO2 particles occurred on top of the thin film and the surface roughness increased when the thickness is increased. AFM results show that nanocomposited PMMA with P25 has high agglomeration particles compared to the other one.

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