Effect of Deposition Time On Optical Properties of Chemical Bath Deposited Mercury Sulfide Thin Layers

2021 ◽  
Author(s):  
Haleh Kangarlou ◽  
Somayeh Asgary
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Deposition Time ◽  
Thin Layers ◽  
X Ray Diffraction ◽  
Mercury Sulfide ◽  
Preferential Growth ◽  
X Ray ◽  
Glass Substrates ◽  
Amorphous Glass

Abstract Mercury sulfide films were deposited on amorphous glass substrates from aqueous solutions by chemical bath deposition method (CBD) at same temperature and different deposition times. Produced layers were post annealed at 250°C about one hour. X-ray diffraction (XRD) was used to study of film’s crystalline structural. Their optical properties were measured by spectrophotometry in the spectra range of 400-850 nm, Kramers-Kronig method was used for the analysis of reflectivity curves of HgS films to obtain the optical constants of films in order to investigation of relation between deposition time and optical properties. According to X-ray diffraction details, all thin films showed crystalline phase with a preferential growth along the (220) planes. Optical results have been shown photolminisance property for HgS produced thin films. By increasing deposition time, the dielectric property, refractive index and band gap values are increased.

INVESTIGATING ANNEALING EFFECT ON OPTICAL PROPERTIES OF Cd0.8Zn0.2S THIN FILMS

2014 ◽  
Vol 21 (05) ◽  
pp. 1450073 ◽  
Author(s):  
SOMAYEH AZIZI ◽  
HAMID REZAGHOLIPOUR DIZAJI ◽  
MOHAMMAD HOSSEIN EHSANI ◽  
SEYED FEYZOLAH GHAVAMI MIRMAHALLE
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Hexagonal Wurtzite Structure ◽  
Band Gap Energy ◽  
Annealing Effect ◽  
Thin Layers ◽  
Optical Parameters ◽  
Thermal Evaporation Method ◽  
X Ray ◽  
Glass Substrates

Cd 0.8 Zn 0.2 S thin films deposited on glass substrates by thermal evaporation method were annealed at different temperatures for the first time in order to investigate annealing effect on optical properties. The compositional, structural of nanoparticles precursor synthesized using microwave irradiation method and optical properties of the films were studied using energy dispersive X-ray (EDX), X-ray diffraction, transmission electron microscopy (TEM), and UV-visible spectrophotometer techniques. The annealed films were found to have hexagonal Wurtzite structure with strong preferential orientation along the (002) diffraction peak. Important optical parameters such as extinction coefficient and refractive index revealed the effect of heat treatment on the deposited thin layers. A reduction in the band gap energy from 2.41 eV to 2.29 eV was observed for the annealed samples.

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.

Effect of Deposition Time on Structural and Optical Properties of ZnO Thin Films Deposited by Spray Pyrolysis

2019 ◽  
Vol 397 ◽  
pp. 81-87 ◽  
Author(s):  
Farid Khediri ◽  
Abdelkader Hafdallah ◽  
Mouna Bouhelal
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Deposition Time ◽  
Spray Pyrolysis Technique ◽  
Precursor Solution ◽  
Zno Thin Films ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray

In this work Zinc oxide thin films prepared by spray pyrolysis technique. A set of ZnO thin films were deposited with various deposition times, on glass substrate at 350 °C. The precursor solution is formed with zinc acetate in distilled methanol with 0.1 molarity. The deposition time was ranged from 2 to 8 min. The structural and optical properties of those films were examined by X-ray diffraction (XRD) and ultraviolet-visible spectrometer (UV). X-ray diffraction patterns of the ZnO thin films showed polycrystalline hexagonal wurtzite structure and the preferred orientation was along (002) plane when the grain size varied between 9.66 and 16.67nm. ZnO thin films were highly transparent in the visible with the maximum transmittance of 85% and the optical band gap was found between 3.25 and 3.28 eV.

scholarly journals Effect some Factors on the Structural Properties of the CdS Thin Films Prepared by Chemical Bath Deposition

2016 ◽  
Vol 64 ◽  
pp. 1-10
Author(s):  
Fatma Salamon
Keyword(s):  
Thin Films ◽  
Chemical Bath Deposition ◽  
Deposition Time ◽  
X Ray Diffraction ◽  
Hexagonal Crystal ◽  
X Ray ◽  
Glass Substrates ◽  
Cds Thin Films ◽  
Temperature Deposition ◽  
Xrd Patterns

CdS thin films were prepared by chemical bath deposition technique (CBD) onto the glass substrates at different conditions of preparation. The obtained samples are studied by X-Ray diffraction (XRD). The XRD patterns of CdS samples revealed the formation with a hexagonal crystal structure P36mc, and the clear effect of the concentration of thiourea, cadmium sulfide, NaOH, time and temperature deposition, and annealing temperature, on the structure of the prepared thin films. through the study, we found that the samples have preferred orientation along [002], also the thickness of thin films decrease with deposition time after certain value, with the appearance of free cadmium. It has been found that the 200°C is the best temperature for annealing to improve the other structural and physical properties of films.

scholarly journals Impact of ZnO Atomic Ratio on Structural, Morphological and Some Optical Properties of (SnO2)1-x (ZnO)x Thin Films

2020 ◽  
pp. 333-340
Author(s):  
Donia Yas Khudair ◽  
Ramiz Ahmed Al Ansari
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Energy Gap ◽  
Atomic Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
Atomic Force ◽  
Uv Visible ◽  
Longitudinal Structures

In this work, SnO2 and (SnO2)1-x(ZnO)x composite thin films with different ZnO atomic ratios (x=0, 5, 10, 15 and 20%) were prepared by pulsed laser deposition technique on clean glass substrates at room temperature without any treatment. The deposited thin films were characterized by x-ray diffraction atomic force microscope  and UV-visible spectrophotometer to study the effect of the ZnO atomic ratio on their structural, morphological and optical properties. It was found that the crystallinety and the crystalline size vary according to ZnO atomic ratio. The surface appeared as longitudinal structures which was convert to spherical shapes with increasing ZnO atomic ratio. The optical transmission and energy gap increased with increasing ZnO atomic ratio. 

scholarly journals Temperature effect on structural and optical properties of V2O5 thin films prepared by spray pyrolysis technique

2020 ◽  
Vol 307 ◽  
pp. 01033
Author(s):  
Asmaa Mrigal ◽  
Lahocine El Gana ◽  
Mouhamed Addou ◽  
Khadija Bahedi ◽  
Rajae Temsamani ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Glass Substrates ◽  
Optical Dielectric Constant

In this work, the effect of substrate temperature on structural and optical properties of V2O5 thin films has been characterized by X-ray diffraction (XRD); SEM and transmission. The films mince has been prepared by Reactive Chemical Spraying technology in Liquid Phase (RCSLP) on glass substrates preheated at (350, 400, 450 and 500 °C). The X-ray diffraction analysis confirms that all layers are polycrystalline, and the preferred orientation of V2O5 is the (001) plane. The morphology of V2O5 thin films are porous nature and their particle’s shape is three-dimensional. The transmittance and absorbance of thin film were measured from which the optical constants (Energy gap, Refractive index, Absorption coefficient, Extinction coefficient and Optical dielectric constant) were determined.

Effect of Na-Doped Concentration on the Structure and Optical Properties of ZnO Thin Films

2012 ◽  
Vol 430-432 ◽  
pp. 310-314 ◽  
Author(s):  
Wei Wang ◽  
Wei Meng ◽  
Ming Hui Liu ◽  
Xin Bo Wang
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Substrate Surface ◽  
Sol Gel ◽  
Zno Thin Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
Optical Band Gaps ◽  
Coating Method

Na-doped ZnO thin films were deposited on microscope glass substrates by sol-gel spin coating method, the Na/Zn ratio were 0at.%, 5at.%, 7.5at.%, 10at.%, 15at.%. The crystal structures, surface morphology, and optical properties were analyzed by X-ray diffraction, scanning electron microscopy, ultraviolet–visible spectrophotometer, respectively. The results show that all the films are preferentially oriented along the c-axis perpendicular to the substrate surface. With the increase of the doping concentration, the roughness of the surfaces decrease and grain size grows from 17.1nm to 21.7nm, the sample with 10at.% Na exhibits best crystallinity and has lowest strain along the c-axis. The average optical transparency of the samples is higher than 70%, optical band gaps are between 3.213eV and 3.289eV.

Structural and Optical Properties of CdS Thin Films Grown by Sputtering

2011 ◽  
Vol 306-307 ◽  
pp. 265-268
Author(s):  
Xue Yan Zhang ◽  
Xiao Yu Liu ◽  
Han Bin Wang ◽  
Xi Jian Zhang ◽  
Qing Pu Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Visible Range ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Glass Substrates ◽  
Grain Sizes ◽  
Cds Thin Films ◽  
Cds Films

Cadmium sulfide (CdS) thin films with (111) preferential orientation were grown on glass substrates at room temperature by radio frequency (R.F.) magnetron sputtering. The structural and optical properties of CdS films have been investigated by X-ray diffraction, Scanning Electron Microscope micrographs, PL spectra and transmittance spectra. The grain sizes have been evaluated. The transmission spectra of the obtained films reveal a relatively high transmission coefficient (80%) in the visible range. All these results show that the grain sizes increased while the optical band gap decreased with increasing the thickness of CdS films.

scholarly journals Influence of Different Annealing Atmosphere Nature on the Properties of Nanoparticles CdS Thin Films Synthesized By Chemical Bath Method.

2021 ◽  
Author(s):  
M. MELOUKI ◽  
Y. LARBAH ◽  
A. DJELLOUL ◽  
M. ADNANE
Keyword(s):  
Thin Films ◽  
Visible Region ◽  
Thin Layers ◽  
Annealing Atmosphere ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
Cds Thin Film ◽  
Cds Thin Films ◽  
Cbd Method

Abstract The Cadmium sulfide (CdS) is the most advantageous material for the manufacture of the elaborate solar cells in thin layers, the study that we present, will relate to the elaborated and the characterization of CdS thin film deposited on glass substrates by chemical bath deposition (CBD) method. This study will help us to know if the annealing atmosphere nature affects the deposition of thin films of CdS. The X-ray diffraction (XRD) analysis reveals that the structures of pure thin films are Hexagonal and polycrystalline with preferential orientation (002). The scanning electron microscopy (SEM) measurements showed that the surface morphology homogeneous and uniform. The energy dispersive X-ray analysis (EDAX) studies confirmed that the films are nearly stoichiometric. The transmittance in the visible region (200-800 nm) is high of 60%, and band gap values oscillated between 2.36 and 2.47 eV for al thin films.

Structural and optical properties of Tin Oxide and Indium doped SnO2 thin films deposited by thermal evaporation technique

2016 ◽  
Vol 12 (3) ◽  
pp. 4394-4399
Author(s):  
Sura Ali Noaman ◽  
Rashid Owaid Kadhim ◽  
Saleem Azara Hussain
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Tin Oxide ◽  
Thermal Evaporation ◽  
Pure Sno2 ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Evaporation Technique ◽  
Sno2 Thin Films

Tin Oxide and Indium doped Tin Oxide (SnO2:In) thin films were deposited on glass and Silicon  substrates  by  thermal evaporation technique.  X-ray diffraction pattern of  pure SnO2 and SnO2:In thin films annealed at 650oC and the results showed  that the structure have tetragonal phase with preferred orientation in (110) plane. AFM studies showed an inhibition of grain growth with increase in indium concentration. SEM studies of pure  SnO2 and  Indium doped tin oxide (SnO2:In) ) thin films showed that the films with regular distribution of particles and they have spherical shape.  Optical properties such as  Transmission , optical band-gap have been measured and calculated.

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