Influence of substrate temperature on the properties of electron beam evaporated ZnSe films

Ahamed, M. G. Syed Basheer; Nagarethinam, V. S.; Balu, A. R.; Thayumanavan, A.; Murali, K. R.; Sanjeeviraja, C.; Jayachandran, M.

doi:10.1002/crat.200900614

Cited by 15 publications

(4 citation statements)

References 30 publications

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“…The deviation of the lattice parameter values from the bulk value observed here clearly suggests that the grains in the films are under stress. This deviation can be attributed to the change in the nature, deposition conditions and concentration of the native imperfections [16].…”

Section: Crystal Structurementioning

confidence: 99%

Aging effect of the precursor solution on the structural, morphological and opto-electrical properties of spray deposited CdO thin films

Raja¹,

Nagarethinam²,

Balu³

2019

Materials Science-Poland

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Nanostructured CdO thin films have been prepared on glass substrates by spray pyrolysis technique using perfume atomizer from fresh and aged (1, 2, 3 and 4 days) precursor solutions. XRD studies confirm that all the films exhibit cubic crystal structure with a (1 1 1) preferential orientation. The preferential orientation factor f(1 1 1) increases with an increase in aging the period of precursor solution. The 2θ value of the (1 1 1) plane shifts towards lower Bragg angles with aging inferring an expansion in the lattice volume of the aged films. Increased crystallite size is observed for the 3-days aged film for which minimum strain and dislocation density values are obtained. Optical transparency increases with an increase in aging period of the precursor solution and the optical band gap exhibits a red shift from 2.48 eV to 2.32 eV. Minimum resistivity of 0.78 × 10−2 Ω·cm is observed for the CdO film prepared from 3-days aged solution. The obtained results infer that the CdO film prepared from 3-days aged solution exhibits better physical properties than the others.

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Section: Crystal Structurementioning

confidence: 99%

Aging effect of the precursor solution on the structural, morphological and opto-electrical properties of spray deposited CdO thin films

Raja¹,

Nagarethinam²,

Balu³

2019

Materials Science-Poland

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“…precursor molar concentrations were found to be equal to 2.12 eV, 2.08 eV, 2.06 eV and 2.02 eV, respectively. It is observed that the optical band gap decreases as the molar concentration of sulfur and tin (S:Sn) in the precursor solution increases and this red shift in the band gap values may be due to the quantum size effect [18]. The reduced band gaps with increasing precursor molar concentration may also be caused by deviation out of the S:Sn = 1 stoichiometry, which induces lattice faults in the films [19].…”

Section: Resultsmentioning

confidence: 99%

Optimization of S:Sn precursor molar concentration on the physical properties of spray deposited single phase Sn₂S₃thin films

Srivind¹,

Nagarethinam²,

Balu³

2016

Materials Science-Poland

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Nanoneedle structured Sn 2 S 3 thin films were prepared by spray pyrolysis technique from aqueous solutions of tin (II) chloride and thiourea, keeping the molar concentrations of S:Sn = 0.01:0.01, 0.02:0.02, 0.03:0.03 and 0.04:0.04 in the starting solutions. XRD studies reveal that all the films exhibit orthorhombic crystal structure with a preferential orientation along the [2 1 1] direction. The peak intensity of the (2 1 1) plane is found to be maximum for the film coated with 0.02:0.02 S:Sn molar concentration which confirms the improved crystalline nature of this film. SEM images depict that the film coated with S:Sn molar concentration 0.02:0.02 exhibit needle shaped grains. The optical band gap exhibits red shift from 2.12 eV to 2.02 eV with an increase in S:Sn precursor molar concentration. Electrical studies show that the films having S:Sn molar concentrations 0.01:0.01 and 0.02:0.02 exhibit minimum resistivity values of 0.238 and 0.359 Ω·cm, respectively.

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“…At the lower substrate temperatures, deposited films will have smaller grain sizes with larger grain boundaries which are highly distorted and thus they have large number of defect states. Therefore the films deposited at higher substrate temperatures will have comparatively larger grain sizes which can cause decrease in the defect states and thereby leads to increase the conductivity of the films [20][21][22].…”

Section: Structural Analysismentioning

confidence: 99%

Structural and Electrical Properties of ZnTe Thin Films Deposited at Various Substrate Temperatures

Gandhi

Patel

Solanki

2013

AMR

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The structural and electrical properties of ZnTe thin films were investigated as a function of substrate temperature. Vacuum evaporated thin films of Zinc Telluride (ZnTe) of 10kÅ thickness have been deposited on ultrasonically cleaned glass substrates at various substrate temperatures (303K, 373K 448K). Structural parameters were obtained using XRD analysis. It was observed that the films deposited were cubic in nature with a strong (111) texture. Electrical parameters (Hall Effect measurement) have been obtained and studied at various temperatures in the range 303-393K. It is observed that Hall coefficient remains positive throughout the whole temperature range indicating that holes are the majority carriers. The results obtained from structural and electrical parameters study have been correlated and it is found that the thin films deposited at higher substrate temperatures possess increasingly good crystalline structure with improved electrical conductivity along with an increase in carrier concentration and mobility of carriers.

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Influence of substrate temperature on the properties of electron beam evaporated ZnSe films

Abstract: ZnSe films were deposited on glass substrates keeping the substrate temperatures, at room temperature (RT), 75, 150 and 250 °C. The films have exhibited cubic structure oriented along the (111) which are attributable to 2TA LO phonon and TO phonon respectively.

Cited by 15 publications

References 30 publications

Aging effect of the precursor solution on the structural, morphological and opto-electrical properties of spray deposited CdO thin films

Aging effect of the precursor solution on the structural, morphological and opto-electrical properties of spray deposited CdO thin films

Optimization of S:Sn precursor molar concentration on the physical properties of spray deposited single phase Sn₂S₃thin films

Structural and Electrical Properties of ZnTe Thin Films Deposited at Various Substrate Temperatures

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Influence of substrate temperature on the properties of electron beam evaporated ZnSe films

Abstract: ZnSe films were deposited on glass substrates keeping the substrate temperatures, at room temperature (RT), 75, 150 and 250 °C. The films have exhibited cubic structure oriented along the (111) which are attributable to 2TA LO phonon and TO phonon respectively.

Cited by 15 publications

References 30 publications

Aging effect of the precursor solution on the structural, morphological and opto-electrical properties of spray deposited CdO thin films

Aging effect of the precursor solution on the structural, morphological and opto-electrical properties of spray deposited CdO thin films

Optimization of S:Sn precursor molar concentration on the physical properties of spray deposited single phase Sn2S3thin films

Structural and Electrical Properties of ZnTe Thin Films Deposited at Various Substrate Temperatures

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Optimization of S:Sn precursor molar concentration on the physical properties of spray deposited single phase Sn₂S₃thin films