scholarly journals Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
N. Chabou ◽  
B. Birouk ◽  
M.S. Aida ◽  
J.P. Raskin
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Chemical Bath Deposition ◽  
Deposition Time ◽  
Ammonium Hydroxide ◽  
Morphological Properties ◽  
Complexing Agent ◽  
Glass Substrates ◽  
Vis Spectroscopy ◽  
Annealing Effects

AbstractNanocrystalline zinc sulfide (ZnS) thin films are prepared on glass substrates by chemical bath deposition (CBD) method using aqueous solutions of zinc chloride, thiourea ammonium hydroxide along with non-toxic complexing agent tri-sodium citrate in alkaline medium at 80 °C. The deposition time and annealing effects on the optical and morphological properties are studied. The morphological, compositional, and optical properties of the films are investigated by scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDAX) and UV-Vis spectroscopy. SEM micrographs exhibit uniform surface coverage. UV-Vis (300 nm to 800 nm) spectrophotometric measurements show transparency of the films (transmittance ranging from 69 % to 81 %), with a direct allowed energy band gap in the range of 3.87 eV to 4.03 eV. After thermal annealing at 500 °C for 120 min, the transmittance increases up to 87 %.

scholarly journals Deposition time and annealing effects on morphological and optical properties of ZnS thin films prepared by chemical bath deposition

2019 ◽  
Vol 37 (3) ◽  
pp. 404-416
Author(s):  
N. Chabou ◽  
B. Birouk ◽  
M.S. Aida ◽  
J.P. Raskin
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Chemical Bath Deposition ◽  
Deposition Time ◽  
Ammonium Hydroxide ◽  
Complexing Agent ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

AbstractNanocrystalline zinc sulfide thin films were prepared on glass substrates by chemical bath deposition method using aqueous solutions of zinc chloride, thiourea ammonium hydroxide along with non-toxic complexing agent trisodium citrate in alkaline medium at 80 °C. The effect of deposition time and annealing on the properties of ZnS thin films was investigated by X-ray diffraction, scanning electron microscopy, optical transmittance spectroscopy and four-point probe method. The X-ray diffraction analysis showed that the samples exhibited cubic sphalerite structure with preferential orientation along 〈2 0 0〉 direction. Scanning electron microscopy micrographs revealed uniform surface coverage, UV-Vis (300 nm to 800 nm) spectrophotometric measurements showed transparency of the films (transmittance ranging from 69 % to 81 %), with a direct allowed energy band gap in the range of 3.87 eV to 4.03 eV. After thermal annealing at 500 °C for 120 min, the transmittance increased up to 87 %. Moreover, the electrical conductivity of the deposited films increased with increasing of the deposition time from 0.35 × 10−4 Ω·cm−1 to 2.7 × 10−4 Ω·cm−1.

Deposition time dependent study of structural and optical properties of PbS thin films grown by CBD method

2020 ◽  
Vol 13 ◽  
Author(s):  
Minakshi Chaudhary ◽  
Yogesh Hase ◽  
Ashwini Punde ◽  
Pratibha Shinde ◽  
Ashish Waghmare ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Band Gap ◽  
Deposition Time ◽  
Secondary Growth ◽  
Cost Effective ◽  
Xrd Analysis ◽  
Structural Morphology ◽  
Glass Substrates ◽  
Cbd Method

: Thin films of PbS were prepared onto glass substrates by using a simple and cost effective CBD method. Influence of deposition time on structural, morphology and optical properties have been investigated systematically. The XRD analysis revealed that PbS films are polycrystalline with preferred orientation in (200) direction. Enhancement in crystallinity and PbS crystallite size has been observed with increase in deposition time. Formation of single phase PbS thin films has been further confirmed by Raman spectroscopy. The surface morphology analysis revealed the formation of prismatic and pebble-like PbS particles and with increase in deposition time these PbS particles are separated from each other without secondary growth. The data obtained from the EDX spectra shows the formation of high-quality but slightly sulfur rich PbS thin films over the entire range of deposition time studied. All films show increase in absorption with increase in deposition time and a strong absorption in the visible and sub-band gap regime of NIR range of the spectrum with red shift in band edge. The optical band gap shows decreasing trend, as deposition time increases but it is higher than the band gap of bulk PbS.

Electrophoretic Deposition of Titania Thin Films: Influence of Deposition Time on Microstructural and Optical Properties of the Coatings

2013 ◽  
Vol 829 ◽  
pp. 917-921
Author(s):  
Saber Ghannadi ◽  
Hossein Abdizadeh ◽  
Mohammad Reza Golobostanfard
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Electrophoretic Deposition ◽  
Deposition Time ◽  
Colloidal Suspension ◽  
Vis Spectroscopy ◽  
Titania Films ◽  
Titania Sol ◽  
Deposited Film ◽  
Deposited Films

Titania thin films were prepared by electrophoretic deposition at various deposition times (1, 5 and 10 min) in constant applied potential (5 V). For this purpose, modified titania sol was prepared as a colloidal suspension. The influence of deposition time on the thickness and optical properties of titania films was investigated. Scanning electron microscope images illustrate compact and homogeneous titania films deposited on FTO substrates. The results show that the film thickness increases with increasing the deposition time. It could be inferred from UV-Vis spectroscopy that increasing the thickness of deposited film causes higher absorbance at UV region. Also, increasing the deposition time from 1 to 5 min leads to increase in optical band gap of the deposited films.

New Approaches to Chemical Bath Deposition of Chalcogenides

1999 ◽  
Vol 606 ◽  
Author(s):  
Paul O’brien ◽  
Markus R. Heinrich ◽  
David J. Otway ◽  
Odile Robbe ◽  
Alexander Bayer ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Solar Cell ◽  
Chemical Bath Deposition ◽  
Glass Substrates ◽  
Heated Substrate ◽  
New Approaches ◽  
Vis Spectroscopy ◽  
Optoelectronic Applications ◽  
Cds Films

AbstractWe have been studying new approaches to conventional Chemical Bath Deposition (CBD) of chalcogenide containing materials, using continuous circulation and replenishment of CBD solution over a heated substrate. Crystalline thin films produced by this method offer potential for use in solar cell devices or other optoelectronic applications. Films of CdS, ZnS and the ternary material CdxZn1−xS have been deposited on TO-glass substrates. In this paper we demonstrate our approach for the deposition of CdS films. These have been characterized by XPS, SEM, XRD and UV/vis spectroscopy and shown to be good quality. The films have been used to fabricate Au/CdTe/CdS/TO-glass solar cells of efficiency 10.1% under AMl.5 illumination.

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.

Effect of Second Complexing Agent of N2H4 on the Optical and Structural Properties of ZnS Thin Films

2013 ◽  
Vol 591 ◽  
pp. 297-300
Author(s):  
Huan Ke ◽  
Shu Wang Duo ◽  
Ting Zhi Liu ◽  
Hao Zhang ◽  
Xiao Yan Fei
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Structural Properties ◽  
Band Gaps ◽  
Complexing Agent ◽  
X Ray Diffraction ◽  
Sphalerite Structure ◽  
X Ray ◽  
Glass Substrates ◽  
Zns Films

ZnS films have been deposited on glass substrates by chemical bath deposition (CBD). The optical and structural properties were analyzed by UV-VIS spectrophotometer and X-ray diffraction (XRD). The results showed that the prepared thin films from the solution using N2H4 as second complexing agent were thicker than those from the solution without adding N2H4 in; this is due to using second complexing agent of N2H4, the deposition mechanisms change which is conductive to heterogeneous deposition. When using N2H4 as second complexing agent, the crystallinity of ZnS thin films improved with a significant peak at 2θ=28.96°which can be assigned to the (111) reflection of the sphalerite structure. The transmittances of the prepared films from the solution adding N2H4 in as second complexing agent were over 85%, compared to those from the solution without N2H4 (over 95%). The band gaps of the ZnS films from the solution using N2H4 as second complexing agent were larger (about 4.0eV) than that from those from the solution without N2H4 (about 3.98eV), which indicated that the prepared ZnS films from the solution adding N2H4 in as second complexing agent were better used as buffer layer of solar cells with adequate optical properties. In short, using N2H4 as second complexing agent, can greatly improve the optical and structural properties of the ZnS thin films.

scholarly journals Effects of Deposition Time on the Chemical Bath-deposited CuS Thin Films

1970 ◽  
Vol 25 ◽  
pp. 2-8 ◽  
Author(s):  
K Anuar ◽  
W. T. Tan ◽  
N. Saravanan ◽  
L. K. Khor ◽  
S. M. Ho
Keyword(s):  
Thin Films ◽  
Chemical Bath Deposition ◽  
Indium Tin Oxide ◽  
Deposition Time ◽  
Sodium Thiosulfate ◽  
Deposition Process ◽  
Chemical Society ◽  
Band Gap Energy ◽  
Oxide Glass ◽  
Glass Substrates

The chemical bath deposition technique was used to deposit thin films of coppersulphide onto indium tin oxide glass substrates. The bath composition included copperchloride which was the source of Cu2+ and sodium thiosulfate which supplied the S2- ions. Xraydiffraction and atomic force microscopy were used to investigate structural andmorphological characterization, respectively. The influence of deposition time was studiedto determine the optimum condition for deposition process. The deposited CuS films showedhexagonal structure. The number of peaks attributable to CuS increased as the depositiontime was increased to 16 hours based on XRD data. AFM images revealed that the chemicalbath-deposited films for 16 hours showed more homogeneous and uniform compared withother deposition times, and the highest absorbance value was obtained for the filmsdeposited at this period. The band gap energy decreased from 2.9 to 2.45 eV when thedeposition time was increased from 8 to 20 hours.Keywords: Chemical bath deposition, copper sulphide, thin films, solar cells.DOI: 10.3126/jncs.v25i0.3276Journal of Nepal Chemical Society Volume 25, 2010 pp 2-8

EFFECTS OF EXCESSIVE REACTANTS ON THE PROPERTIES OF CADMIUM SULFIDE THIN FILMS PREPARED BY CHEMICAL BATH DEPOSITION

2008 ◽  
Vol 07 (04n05) ◽  
pp. 279-282
Author(s):  
VORRADA LORYUENYONG ◽  
NOPPANUT RUANKUL ◽  
NATTAPON SUPSO ◽  
PONGSATORN CHUNPADUNGSUK
Keyword(s):  
Cadmium Sulfide ◽  
Chemical Bath Deposition ◽  
Quantum Confinement Effect ◽  
Ammonium Hydroxide ◽  
Complexing Agent ◽  
X Ray Diffraction ◽  
Cubic Crystal ◽  
Glass Substrates ◽  
Source Materials ◽  
Cds Films

Cadmium sulfide nanoparticles were synthesized and grown on glass substrates by chemical bath deposition. The method involves the preparation of aqueous solutions containing cadmium chloride ( CdCl 2) and thiourea [ CS ( NH 2)2] as source materials for cadmium and sulfur components, respectively. Ammonium hydroxide ( NH 4 OH )–ammonium chloride ( NH 4 Cl ) solution was used as a complexing agent in this study. The hexagonal and cubic crystal structure of as-deposited CdS films, determined by X-ray diffraction (XRD), is shown. The effects of Cd : S ratio variation on the surface morphology and optical properties of CdS films are also reported. The UV-vis transmission spectrum and SEM micrographs indicated that the Cd : S ratio in the aqueous solution had an impact on the band gap as well as the crystallite size and packing density of the CdS particles due to the quantum confinement effect.

scholarly journals Effect of Annealing Temperature and Time on the Optical Properties of SnS Thin Films Prepared by Chemical Bath Deposition

2013 ◽  
Vol 1 (2) ◽  
pp. 121-130
Author(s):  
J.I Onwuemeka ◽  
F.M Ezike ◽  
N.C Nwulu
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Band Gap ◽  
Chemical Bath Deposition ◽  
Complexing Agent ◽  
Rutherford Back Scattering ◽  
Double Beam ◽  
Two Samples ◽  
Sns Thin Films

A research on the deposition and Characterization of SnS Thin Films by Chemical Bath Deposition Technique using Ammonia (NH3) as a complexing agent. Thin film of Tin (II) sulphide (SnS) is deposited onto glass substrates using chemical bath deposition (CBD) at room temperature for 3hours and 1hour. The optical properties of the film were measured using Double Beam UV- Spectrophotometer with serial number UV061514, Energy dispersive X-ray florescence (EDXRF) determines the compositions together with Rutherford Back Scattering (RBS) analysis revealed that thin films have percentage compositions of the elements (Sn/S, 50.1/49.9 for 3hours and Sn/S, 50.4/49.6 for 1hour) and their thicknesses are 100nm for 3hours and 150nm for 1hour. It was found that SnS thin film exhibits p-type conduction. Optical band gap values of direct and indirect transitions are estimated to be 1.98eV to 2.01eV and 1.82eV to 1.98eV for the two samples respectively. The other optical properties calculated from transmittance using appropriate equations are absorbance, reflectance, band gap , absorption coefficient, optical conductivity, refractive index and extinction coefficient.

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