scholarly journals Studying the Effect of Metallic Precursor Concentration on the Structural, Optical, and Morphological Properties of Zinc Sulfide Thin Films in Photovoltaic Cell Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
S. Abel ◽  
J. Leta Tesfaye ◽  
R. Kiran ◽  
T. Deepak ◽  
A. Usha Ruby ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Zinc Sulfide ◽  
Zinc Acetate ◽  
Amorphous Structure ◽  
Precursor Concentration ◽  
Morphological Properties ◽  
Cobalt Sulfide ◽  
Complexing Agents ◽  
Metallic Precursor

Thin films of zinc sulfide (ZnS) with different concentrations of zinc acetate have been made by chemical bath deposition technique in acidic medium (pH = 5) on glass substrate using zinc acetate and sodium sulfide as sources of Zn+2 ion and S−2 ion, respectively, and ethylenediaminetetraacetate as complexing agents and sulfuric acid to adjust pH value at a constant deposition temperature of 85°C, and the deposition time of 90 minutes was used. The effect of the concentration of metallic precursor on the structural, morphological, and optical properties of chemical bath deposited zinc sulfide thin films was investigated in this study. The XRD result confirmed mixed phases of crystalline and amorphous structure dominating other phases, which is witnessed by larger crystallite size than other phases. It reveals that the thin films had hexagonal structure at the medium concentration with preferred orientation along (111) plane, and at lower and higher concentration, it showed that film has an amorphous structure in nature. The crystallinity of all the phases significantly enlarged with increasing the zinc precursor concentration. The SEM micrographs showed high-pitched edged irregular-shaped grains covering the substrate with pinholes and bangs. The optical properties investigated by the UV-VIS spectrometer specified a decrease in the optical bandgap of the films between 3.5 eV and 2.6 eV as the zinc acetate concentration in the solution increased from 0.1 to 0.2 M. It showed that the zinc sulfide had high absorption in the UV radiation. The main finding of this paper is that metallic precursor concentration has a significant role in the optical, morphological, and microstructural properties of the cobalt sulfide thin films, which are most suitable for photovoltaic applications.

scholarly journals Study of Composition and Optical Properties of Chemically Deposited Pd-xSb2S3 Thin Films

2017 ◽  
Vol 7 (3) ◽  
Author(s):  
Patrick Akata Nwofe
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Band Gap ◽  
Energy Band ◽  
Bath Temperature ◽  
Morphological Properties ◽  
Optical Absorption Coefficient ◽  
Complexing Agents ◽  
Energy Band Gap ◽  
Rutherford Back Scattering

The study reports on the effects of different concentration of palladium impurities on the compositional and optical properties of Palladium Doped Antimony Sulphide (Pd-xSb2S3) thin films grown by the chemical bath deposition method. The films were grown at room temperature and other deposition conditions such as the bath temperature, pH, complexing agents were kept constant. The concentration of the dopants were varied between 0.1 M to 0.3 M. The films were annealed at an annealing temperature of 200  oC  for 1 hour. The films were characterised using the Rutherford Back Scattering (RBS) techniques and optical spectroscopy (transmittance versus wavelength, absorbance versus wavelength) to investigate the composition, and optical constants (optical absorption coefficient, energy band gap, and extinction coefficient) respectively. X-ray diffractometry and Scanning electron microscopy were also used to investigate the structural and morphological properties of the layers. The results show that the transmittances of the doped layers were higher compared to the as-deposited layers. The energy band gap was direct, and were found to be decreased for the doped layers, compared to the as-grown films. The values of the energy band gap were typically ≤ 2.30 eV for the former and 2.48 eV for the latter. These values strongly suggest the use of these films in optoelectronic applications especially in solar cell devices.

Influence of argon ambience on the structural, morphological and optical properties of pulsed laser ablated zinc sulfide thin films

2012 ◽  
Vol 132 (4) ◽  
pp. 944-952 ◽  
Author(s):  
S.R. Chalana ◽  
R. Vinodkumar ◽  
I. Navas ◽  
V. Ganesan ◽  
V.P. Mahadevan Pillai
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Zinc Sulfide ◽  
Pulsed Laser

Zinc Sulfide Nanoscaled Buffer Layers for Cu(In,Ga)Se2 Thin Film Solar Cells by Chemical Bath Deposition

2008 ◽  
Vol 51 ◽  
pp. 125-130 ◽  
Author(s):  
Rong Fuh Louh ◽  
Warren Wu
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cells ◽  
Zinc Sulfide ◽  
Chemical Bath Deposition ◽  
Energy Gap ◽  
Buffer Layers ◽  
Thin Film Solar Cells ◽  
Complexing Agents ◽  
Study Results

Chemical bath deposition (CBD) is a fairly simple synthetic route to prepare II-VI semicondutive zinc sulfide thin films, which can be prepared on the flat surface of glass or silicon wafer substrates in the solution containing the precursors of zinc and sulfur ions in terms of ambient conditions of varying acidity. This study particularly aims at the growth dependence and optical property of ZnS thin films in the CBD process by different experiment parameters, whereas we intend to choose suitable types of zinc ionic precursors to be coupled with various CBD parameters such as reaction temperature and time, precursor concentration, types and complexing agents as well as post-deposition heat treatment conditions. Addition of different concentration of ethylenediamine, ammonium sulfate, sodium citrate and hydrazine in the CBD reaction process was used to control the adequate growth rate of ZnS thin films. As a consequence, the rapid thermal annealing was employed to enhance the film uniformity and thickness evenness, transmittance and the energy gap of ZnS samples. The results would lead to a potential application of buffer layer for the Cu (In,Ga)Se2 based thin film solar cells. The analytic instrument including SEM, AFM, UV-VIS were used to examine the CBD-derived nanosized ZnS buffer layers for the thin film solar cells. The ZnS thin films prepared by the chemical bath deposition in this study results in film thickness of 80 ~ 100 nm, high transmittance of 80~85% and the energy gap of 3.89 ~ 3.98 eV.

SPECTROSCOPIC ELLIPSOMETRY STUDIES ON ZINC OXIDE THIN FILMS DEPOSITED BY SOL–GEL METHOD WITH VARIOUS PRECURSOR CONCENTRATIONS

2019 ◽  
Vol 26 (03) ◽  
pp. 1850158 ◽  
Author(s):  
MARYAM MOTALLEBI AGHGONBAD ◽  
HASSAN SEDGHI
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Spectroscopic Ellipsometry ◽  
Zinc Acetate ◽  
Optical Band Gap ◽  
Zinc Acetate Dihydrate ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Acetate Dihydrate

Zinc Oxide thin films were deposited on glass substrates by sol–gel spin coating method. Zinc acetate dihydrate, 2-methoxyethanol and monoethanolamine were used as precursor, solvent and stabilizer, respectively. Zinc acetate dihydrate was used with different molar concentrations of 0.15, 0.25 and 0.5 M. Optical properties of ZnO thin films such as dielectric constants, absorption coefficient, Urbach energy and optical band gap energy were calculated by spectroscopic ellipsometry (SE) method. The effect of zinc acetate concentration on optical properties of ZnO thin films is investigated. ZnO thin film with Zn concentration of 0.25 M had the highest optical band gap. Wemple DiDomenico oscillator model was used for calculation of the energy of effective dispersion oscillator, the dispersion energy, the high frequency dielectric constant, the long wavelength refractive index and the free carrier concentration.

scholarly journals Influence of zinc ion concentration on structure, morphology and optical properties of spray deposited ZnO thin films

2021 ◽  
Vol 10 (3) ◽  
pp. 198
Author(s):  
Sarika Vishvnbath Jadhav ◽  
Limbraj Sopan Ravangave
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Crystallite Size ◽  
Zinc Acetate ◽  
Zinc Ion ◽  
Ion Concentration ◽  
Zno Thin Films ◽  
Electromagnetic Spectrum ◽  
Structure Morphology ◽  
Wide Range

<p>Zinc Oxide (ZnO) thin films were deposited for five different molarity (M) of Zinc acetate hydrated (0.075, 0.1, 0.125, 0.15, 0.175 M) using simple spray technique to study the effect of zinc ion concentration on structure, morphology and optical properties. The XRD patterns of deposited ZnO thin films show hexagonal crystal structure with wurtzite symmetry. The effect of molarity on morphology was studied using scanning electron microscopy (SEM). The elemental analysis was studied by using energy dispersive X-ray analysis (EDX). The optical absorption was recorded by using systronics double beam spectrophotometer (2201). Crystallite size estimated from XRD data was in nanometre (nm) range; however, films deposited for 0.15 M zinc acetate show maximum crystallite size (66 nm) as compared to other samples. All the films show low absorption in wide range (340-999 nm) of electromagnetic spectrum. However, ZnO film deposited for 0.15 zinc acetate hydrated shows maximum blue shifting of absorption edge and higher band gap (3.8 eV) as compared to other samples.</p>

The effect of organic solvents on the optical and morphological properties of metallophthalocyanines containing 3,5-bis(2′,3′,4′,5′,6′-pentafluorobenzyloxy)benzyloxy groups

2019 ◽  
Vol 23 (01n02) ◽  
pp. 136-141 ◽  
Author(s):  
Mukaddes Özçeşmeci ◽  
İdris Sorar ◽  
Esin Hamuryudan
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Surface Morphology ◽  
Organic Solvent ◽  
Organic Solvents ◽  
Spin Coating ◽  
Spin Coating Technique ◽  
Morphological Properties ◽  
Metal Phthalocyanines ◽  
Coating Technique

Thin films of metal phthalocyanines (M: Co, Zn, Ni) substituted with four 3,5-bis(2[Formula: see text],3[Formula: see text],4[Formula: see text],5[Formula: see text],6[Formula: see text]-pentafluorobenzyloxy)benzyloxy groups have been prepared by the spin-coating technique. Optical properties and surface morphology of the thin films of metallophthalocyanines have been investigated as a function of organic solvents of acetone, chloroform, tetrahydrofuran, dimethylformamide and dimethylsulfoxide. Results show that optical properties and surface morphology of the prepared films depend on the type of organic solvent used.

The Effect of Different Complexing Agents on the Properties of Zinc Sulfide Thin Films Deposited from Aqueous Solutions

2016 ◽  
Vol 10 (3) ◽  
pp. 317-323 ◽  
Author(s):  
Pavlo Shapoval ◽  
◽  
Martyn Sozanskyi ◽  
Iosyp Yatchyshyn ◽  
Bogdan Kulyk ◽  
...  
Keyword(s):  
Thin Films ◽  
Aqueous Solutions ◽  
Zinc Sulfide ◽  
Substrate Surface ◽  
Trisodium Citrate ◽  
Zinc Salt ◽  
Complexing Agents ◽  
Complexing Agent ◽  
Zinc Hydroxide ◽  
Structural Morphology

The zinc sulfide (ZnS) thin films were prepared on glass substrates by chemical bath deposition using the aqueous solutions of zinc chloride, thiourea, pH regulator and complexing agent (ammonia and hydrazine hydrate, trisodium citrate or sodium hydroxide). The calculations of boundary conditions for formation of zinc sulfide and zinc hydroxide were made at various zinc salt concentrations with different complexing agents. The structural, morphology and optical properties of the ZnS thin films were investigated. The thickness of ZnS films was measured and the recalculation of zinc mass per cm2 of the substrate surface was held for comparison. The deposition mechanism is discussed.

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