scholarly journals Growth and Characterization of PbTe Thin-film through Solvo Thermal Method

2019 ◽  
pp. 1-5 ◽  
Author(s):  
B. A. Ahuome ◽  
I. Adamu ◽  
M. A. Adamu ◽  
A. N. Baba-Kutigi
Keyword(s):  
Thin Film ◽  
Fill Factor ◽  
Optical Band Gap ◽  
Cadmium Sulphide ◽  
Band Gap Energy ◽  
Thermal Method ◽  
Gravimetric Analysis ◽  
Optical Absorbance ◽  
Internal Parameters

The research considered the Solvo-Thermal method of growing PbTe on non-conducting glass substrate. Cadmium Sulphide thin-film was deposited and used as the n-type absorber layer. On the internal parameters studied, the PbTe nano-film has thickness of  as measured through gravimetric analysis; the optical absorbance studied through the use of UV-750 Series spectrophotometer showed a stable absorbance within the visible wavelength (390 nm – 700 nm) and optical band gap energy of was obtained as extrapolated from the graph of  against . The I-V pattern were measured and plotted. The PbTe grown through this method therefore show a good Fill factor of  

Stability Investigation in the Optical Properties of Thermally Evaporated Ge5Se95-x Znx Thin Films

2015 ◽  
Vol 7 (3) ◽  
pp. 1923-1930
Author(s):  
Austine Amukayia Mulama ◽  
Julius Mwakondo Mwabora ◽  
Andrew Odhiambo Oduor ◽  
Cosmas Mulwa Muiva ◽  
Boniface Muthoka ◽  
...  
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Optical Band Gap ◽  
Thermal Evaporation ◽  
Optical Transition ◽  
Bulk Material ◽  
Band Gap Energy ◽  
Optical Absorbance ◽  
Gap Energy ◽  
Constituent Elements

 Selenium-based chalcogenides are useful in telecommunication devices like infrared optics and threshold switching devices. The investigated system of Ge5Se95-xZnx (0.0 ≤ x ≤ 4 at.%) has been prepared from high purity constituent elements. Thin films from the bulk material were deposited by vacuum thermal evaporation. Optical absorbance measurements have been performed on the as-deposited thin films using transmission spectra. The allowed optical transition was found to be indirect and the corresponding band gap energy determined. The variation of optical band gap energy with the average coordination number has also been investigated based on the chemical bonding between the constituents and the rigidity behaviour of the system’s network.

Characterization of MnS Thin Films Deposited by Chemical Bath Deposition

2019 ◽  
Vol 969 ◽  
pp. 433-438 ◽  
Author(s):  
Dattatraya K. Sonavane ◽  
S.K. Jare ◽  
M.A. Shaikh ◽  
R.V. Kathare ◽  
R.N. Bulakhe
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Band Gap ◽  
Chemical Bath Deposition ◽  
Band Gap Energy ◽  
Sulfur Source ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Double Beam

Glass substrates are used to deposit thin films utilizing basic and value effective chemical bath deposition (CBD) technique. The films were prepared from the mixture as solutions of manganous acetate tetrahydrate [C4H6MnO44H2O] as a manganese source, thiourea [(H2 N) 2 CS] as a sulfur source and triethanolamine (TEA) [(HOC2H4)3N] as a complexing agent.In the present paper the deposition was successfully done at 60 °C temperature. The absorption properties and band gap energy were determined employing double beam spectrophotometer. The optical band gap value calculated from absorption spectra of MnS thin film is found to be about 3.1eV.The MnS thin film was structurally characterized by X-ray Diffraction (XRD). The MnS thin film was morphologically characterized by Scanning Electron Microscopy (SEM) and elemental analysis was performed using EDS to confirm the formation of MnS.

CHARACTERIZATION OF ZINC OXIDE NANOPOWDERS DOPED WITH MnO

2010 ◽  
Vol 24 (08) ◽  
pp. 749-760 ◽  
Author(s):  
M. EBRAHIMIZADEH ABRISHAMI ◽  
E. ATTARAN KAKHKI ◽  
S. M. HOSSEINI ◽  
A. KOMPANY
Keyword(s):  
Optical Constants ◽  
Optical Band Gap ◽  
Sol Gel ◽  
Secondary Phase ◽  
Band Gap Energy ◽  
Gel Technique ◽  
Size And Morphology ◽  
Mn Doped ◽  
Compositional Characterization

Pure ZnO and Zn 1-x Mn x O (x=0.02 and 0.06) nanopowders have been synthesized by sol–gel technique at low temperatures. XRD results indicated that the crystal structure is hexagonal and there is no secondary phase. The compositional characterization of Mn -doped samples was investigated by EDX spectra. The size and morphology of nanoparticles were obtained by SEM and TEM images. Optical constants such as refractive index and extinction coefficient were evaluated from transmittance spectrum in UV region. The optical band gap energy showed a red-shift from 3.22 eV to 3.14 eV for pure and Zn 0.94 Mn 0.06 O , respectively. The Curie temperature of Mn -doped ZnO samples were determined and at room temperature no ferromagnetism state was observed.

scholarly journals Optical Properties and Characterization of Prepared Sn-Doped PbSe Thin Film

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
M. R. Khanlary ◽  
E. Salavati
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Optical Band Gap ◽  
Xrd Analysis ◽  
High Energy ◽  
Properties And Characterization ◽  
Different Doses

Physical vapor deposition of tin-doped lead selenide (Sn/PbSe) thin films on SiO2glass is described. Interaction of high-energy Ar+ions bombardment on the doped PbSe films is discussed by XRD analysis. The improvement of optical band gap of Sn/PbSe films irradiated by different doses of irradiation was studied using transmission spectroscopy.

scholarly journals Development of a High-Density Piezoelectric Micromachined Ultrasonic Transducer Array Based on Patterned Aluminum Nitride Thin Film

Micromachines ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 623 ◽  
Author(s):  
Eunjung Shin ◽  
Hong Goo Yeo ◽  
Ara Yeon ◽  
Changzhu Jin ◽  
Wonki Park ◽  
...  
Keyword(s):  
Thin Film ◽  
Aluminum Nitride ◽  
Resonant Frequency ◽  
Fill Factor ◽  
Ultrasonic Transducer ◽  
Peak Displacement ◽  
Biomedical Sensing ◽  
Potential Applications ◽  
Pressure Output

This study presents the fabrication and characterization of a piezoelectric micromachined ultrasonic transducer (pMUT; radius: 40 µm) using a patterned aluminum nitride (AlN) thin film as the active piezoelectric material. A 20 × 20 array of pMUTs using a 1 µm thick AlN thin film was designed and fabricated on a 2 × 2 mm2 footprint for a high fill factor. Based on the electrical impedance and phase of the pMUT array, the electromechanical coefficient was ~1.7% at the average resonant frequency of 2.82 MHz in air. Dynamic displacement of the pMUT surface was characterized by scanning laser Doppler vibrometry. The pressure output while immersed in water was 19.79 kPa when calculated based on the peak displacement at the resonant frequency. The proposed AlN pMUT array has potential applications in biomedical sensing for healthcare, medical imaging, and biometrics.

scholarly journals Fabrication and Characterization of Thin Film Solar Cell Made from CuIn0.75Ga0.25S2Wurtzite Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Fengyan Zhang ◽  
Chivin Sun ◽  
Cyril Bajracharya ◽  
Rene G. Rodriguez ◽  
Joshua J. Pak
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Fill Factor ◽  
Single Step ◽  
Thin Film Solar Cells ◽  
Wurtzite Phase ◽  
Cigs Thin Film ◽  
Fabrication And Characterization ◽  
First Time

CuIn0.75Ga0.25S2(CIGS) thin film solar cells have been successfully fabricated using CIGS Wurtzite phase nanoparticles for the first time. The structure of the cell is Glass/Mo/CIGS/CdS/ZnO/ZnO:Al/Ag. The light absorption layer is made from CIGS Wurtzite phase nanoparticles that are formed from single-source precursors through a microwave irradiation. The Wurtzite phase nanoparticles were converted to Chalcopyrite phase film through a single-step annealing process in the presence of argon and sulfur at 450°C. The solar cell made from Wurtzite phase nanoparticles showed 1.6% efficiency and 0.42 fill factor.

Synthesis and Characterization of Superparamagnetic Fe3O4 Nanoparticles

2013 ◽  
Vol 750-752 ◽  
pp. 340-343 ◽  
Author(s):  
De Hui Sun ◽  
Jiao Wu ◽  
Ji Lin Zhang
Keyword(s):  
Room Temperature ◽  
Thermal Method ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Xrd Pattern ◽  
X Ray ◽  
Magnetic Investigation ◽  
Average Size

We synthesized Fe3O4 nanoparticles using a solvent thermal method and characterized the morphologies, structures, surface properties, thermal stability and magnetism of the products by Field emission scanning electron microscopy (FE-SEM), Powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The experimental results showed that the Fe3O4 nanoparticles have a tunable average size range from 55 nm to 85 nm. Their diameters decreased with increase of precursor FeCl24H2O concentration or increase of the reaction time under other reaction conditions held constant. The XRD pattern confirmed that the Fe3O4 nanoparticles belong to cubic structure. Magnetic investigation reveals that the Fe3O4 nanoparticles have higher saturation magnetization and negligible coercivity at room temperature.

Synthesis and Characterization of Nickel Oxide Nanostructures by Hydrothermal Method

2018 ◽  
Vol 24 (8) ◽  
pp. 5691-5694 ◽  
Author(s):  
D Sathisha ◽  
K. Gopalakrishna Naik
Keyword(s):  
Nickel Oxide ◽  
Hydrothermal Method ◽  
Optical Band Gap ◽  
Volume Ratio ◽  
Band Gap Energy ◽  
Visible Absorption ◽  
Oxide Nanostructures ◽  
Water As Solvent ◽  
Uv Visible

Nickel oxide (NiO) nanostructures were synthesized by hydrothermal method using ethylene glycol and double distilled water as solvent in 3:2 volume ratio. The synthesized nanostructures were characterized by XRD, FESEM, EDX, FTIR, and UV-visible spectroscopy. XRD result shows that the synthesized nanostructures are polycrystalline in nature. FESEM images show the growth of NiO nanowires. The elemental compositions of the samples were analyzed by EDS. Fourier transform infrared (FTIR) spectroscopy confirms the existence of Ni–O bond in the sample. Optical band gap energy of about 3.71 eV was calculated from the UV-visible absorption measurement.

scholarly journals Characterization of cadmium sulphide (CdS) thin film deposited by spray pyrolysis technique

2016 ◽  
Vol 4 (2) ◽  
pp. 58 ◽  
Author(s):  
Sachin H. Dhawankar ◽  
Bhagwat. M. Suryavanshi
Keyword(s):  
Thin Film ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Visible Region ◽  
Cadmium Sulphide ◽  
Hexagonal Structure ◽  
Xrd Pattern ◽  
Cds Thin Film ◽  
Spray Pyrolysis Deposition

Cadmium sulphide thin film is deposited on the glass slide using aqueous solution of cadmium chloride and thiourea by using spray pyrolysis deposition technique at temperature of 4000C. Structural, optical and electrical properties of deposited CdS thin film are investigated. Optical studied of CdS thin film is characterized by using UV –Visible Spectrophotometer in the visible region (380 – 1000 nm). The energy Band gap of CdS thin film is obtained in the present work at 2.3 eV. Thickness of CdS thin film is determined by using weight difference density method. Absorption coefficient and extinction coefficient of CdS thin film are studied in the present work. Structural characterization of CdS thin is done by using X-Ray diffractometer. XRD Pattern analysis showed that the CdS thin film is mixed phases of cubic and hexagonal structure. Using four probe methods the electrical resistivity and electrical conductivity of CdS thin film are studied.

scholarly journals Effect of Post-Annealing Treatment on the Morphological and Optical Properties of ZnO Thin Film Fabricated by Spraying Deposition Method

2021 ◽  
Vol 11 (1) ◽  
pp. 113
Author(s):  
Teguh Darsono ◽  
Muqoyyanah Muqoyyanah ◽  
Sulhadi Sulhadi ◽  
Siti Wahyuni ◽  
Putut Marwoto ◽  
...  
Keyword(s):  
Thin Film ◽  
Optical Band Gap ◽  
Annealing Treatment ◽  
Annealed Film ◽  
Band Gap Energy ◽  
Sem Analysis ◽  
Morphological Properties ◽  
Zno Thin Film ◽  
Deposition Method ◽  
Post Annealing

<p class="AbstractText">This work investigated the effect of post-annealing treatment on the fabrication of zinc oxide (ZnO) thin film by spraying deposition method. Based on SEM analysis, the annealed ZnO thin film at 400˚C presented better uniformity as compared to the non-annealed film. Further measurement by UV-Vis revealed that the lowest optical band gap energy (<em>E<sub>g</sub></em>) (3.22 eV) was achieved by 400˚C sample. These results confirmed that post-annealing treatment enhanced the optical and morphological properties of the fabricated ZnO thin film.</p>

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