scholarly journals Effects of Annealing Temperature of TiO2 Thin Film Deposited by Spray Pyrolysis Deposition Method for Dye-Sensitized Solar Cell (DSSC) Application

2015 ◽  
Vol 773-774 ◽  
pp. 662-666
Author(s):  
Noor Kamalia Abd Hamed ◽  
Nur Ain Adam ◽  
Mohd Khairul bin Ahmad
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Spray Pyrolysis ◽  
Annealing Temperature ◽  
Dye Sensitized Solar Cell ◽  
Deposition Method ◽  
Optimum Temperature ◽  
Dye Sensitized ◽  
Spray Pyrolysis Deposition ◽  
Different Temperatures

Titaniumdioxide (TiO2) Thin Films Have been Fabricated and Deposited on Ftoglass Substrates by Spray Pyrolysis Deposition (SPD) Method. the TiO2thin Films were Annealed at Four Different Temperatures for an Hour. Thetemperature was Set at 100°C, 300°C, 400°C and 500°C. Surface Morphology Andelectrical Properties of TiO2 Thin Films were Investigated Usingfesem and 2 Point- Probe I-V Measurement, Respectively. the FESEM Result Shows Thatthe Grain Size of the Tio2 increases when Annealed Temperatureincreases. for XRD Test Shows that the Crystallinity Improved with Theincreasing of Annealing Temperature. when the Annealing Temperature Increases,the Electrical Properties of TiO2 Also Change. the Result Shows Thatthe Optimum Temperature for Annealing of TiO2 Thin Film was 400°C.

scholarly journals Preparation of Cobalt Doped DSC Using Spray Pyrolysis Deposition (SPD) Technique

2015 ◽  
Vol 773-774 ◽  
pp. 729-733
Author(s):  
Mohd Khairul Ahmad ◽  
Kenji Murakami
Keyword(s):  
Thin Film ◽  
Spray Pyrolysis ◽  
Tio2 Thin Film ◽  
Dye Sensitized Solar Cell ◽  
Spray Pyrolysis Method ◽  
Doped Tio2 ◽  
Dye Sensitized ◽  
Pyrolysis Method ◽  
Spray Pyrolysis Deposition ◽  
Doped Titanium Dioxide

Dye-Sensitized Solar Cell (DSSC) has been prepared using Cobalt doped Titanium Dioxide (TiO2). The preparation of Cobalt doped TiO2 were done using spray pyrolysis method. Cobalt doped TiO2 thin film were annealed at 500 °C for 3hours and the effects of Cobalt as a dopant, towards the surface morphology and structural properties have been studied. Finally, I-V measurement of DSSC was done under illumination of AM 1.5 and 100mW/cm2.

Enhancement of Solar Cell Efficiency by Using TiO2 Nanostructure Doped Fe2O3 Dye and Effect Concentration of Solvent on Optical Properties

2019 ◽  
pp. 1-14
Author(s):  
Abubakr Mahmoud Hamid ◽  
Hassan Wardi Hassan ◽  
Fatima Ahmed Osman
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Solar Cell ◽  
Spray Pyrolysis ◽  
Titanium Oxide ◽  
Deposition Method ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Spray Pyrolysis Deposition

Solar energy has the greatest potential of all the sources of renewable energy, as only a small amount of this form of energy could be used, especially when other sources (coal, oil or gas) in the country have depleted. A solar cell is a solid electrical device that converts solar energy directly to electricity. Hybrid solar cells based on inorganic and organic compounds are a promising renewable energy source. Aims: The aim of this study was to prepare a nanostructured thin film of titanium oxide: doped iron oxide for enhancement of solar cell efficiency. In addition to studying the effect doped on optical properties of titanium oxide nanostructure thin film. Study Design: The spray pyrolysis deposition method used for preparation the nanostructure material. Place and Duration of Study: This study was conducted in the department of physics and department of materials sciences, Al-neelain university, between January 2016 and January 2019. Methodology: Thin films of Titanium Oxide (TiO2) doped Iron Oxide (Fe2O3) have been prepared by chemical spray pyrolysis deposition technique. A laboratory designed glass atomizer was used for spraying the aqueous solution. Which has an output nozzle about 1mm then the film was deposited on preheated cleaned glass substrates at the temperature of 400ºC. we used different concentration to study optical parameters. A 1.5 g TiO2 powder of anatase structure doped with 1.5 g of Fe2O3 was mixed with 2 ml of ethanol and stirred using a magnetic stirrer for 30 minutes to form TiO2 paste to obtain the starting solution for deposition and spray time was 10 s and spray interval 2 min was kept constant. The carrier gas (filtered compressed air) was maintained at a pressure of 105 Nm-2, and distance between nozzle and substrate was about 30 cm ± 1 cm. The thickness of the sample was measured using the weighting method and was found to be around 400 nm. Optical transmittance and absorbance were records in the wavelength range of (200-1100) nm using UV-Visible spectrophotometer (Shimadzu Company Japan). Results: The results obtained showed that the optical band gap decreased from 5.58 eV before doping to (3.9, 3.81, 3.81 and 3.81 eV) after doped for TiO2:Fe2O3 thin films, this result refers to the broadening of secondary levels that product by TiO2: doping to the Fe2O2 thin films. Also, the results showed the variation of refractive index with wavelength for different concentration after doped of TiO2:Fe2O3 films from this figure, it is clear that n decrease with low concentration and increase with high concentration after doped that mean the density is decreased of this films. In addition the extinction coefficient of TiO2:Fe2O3 thin films recorded before doped and with different concentration (1.1, 1.2, 1.5 and 1.6 mol/L) and in the range of (300 – 1200) nm and after doped it observed from that the extinction coefficient, decrease sharply with the increase of wavelength for all prepared films and all the sample after doped is interference between them accept the sample before annealing is far from the other sample. Conclusion: Based on the results obtained doping of titanium oxide increases the efficiency of TiO2 thin film in DSSC. It also proves that the fabrication of TiO2 thin films by spray pyrolysis deposition method is successful.

scholarly journals Optimizing the Properties of La0.8Sr0.2CrO3 Thin Films through Post-Annealing for High-Temperature Sensing

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1802
Author(s):  
Dan Liu ◽  
Peng Shi ◽  
Yantao Liu ◽  
Yijun Zhang ◽  
Bian Tian ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Annealing Temperature ◽  
Rf Sputtering ◽  
Maximum Size ◽  
Cross Sectional ◽  
Post Annealing ◽  
Maximum Conductivity ◽  
Different Temperatures ◽  
Post Annealing Temperature

La0.8Sr0.2CrO3 (0.2LSCO) thin films were prepared via the RF sputtering method to fabricate thin-film thermocouples (TFTCs), and post-annealing processes were employed to optimize their properties to sense high temperatures. The XRD patterns of the 0.2LSCO thin films showed a pure phase, and their crystallinities increased with the post-annealing temperature from 800 °C to 1000 °C, while some impurity phases of Cr2O3 and SrCr2O7 were observed above 1000 °C. The surface images indicated that the grain size increased first and then decreased, and the maximum size was 0.71 μm at 1100 °C. The cross-sectional images showed that the thickness of the 0.2LSCO thin films decreased significantly above 1000 °C, which was mainly due to the evaporation of Sr2+ and Cr3+. At the same time, the maximum conductivity was achieved for the film annealed at 1000 °C, which was 6.25 × 10−2 S/cm. When the thin films post-annealed at different temperatures were coupled with Pt reference electrodes to form TFTCs, the trend of output voltage to first increase and then decrease was observed, and the maximum average Seebeck coefficient of 167.8 µV/°C was obtained for the 0.2LSCO thin film post-annealed at 1100 °C. Through post-annealing optimization, the best post-annealing temperature was 1000 °C, which made the 0.2LSCO thin film more stable to monitor the temperatures of turbine engines for a long period of time.

CuxSbySz THIN FILMS PRODUCED BY ANNEALING CHEMICALLY DEPOSITED Sb2S3-CuS THIN FILMS

2001 ◽  
Vol 15 (17n19) ◽  
pp. 667-670 ◽  
Author(s):  
Y. RODRÍGUEZ-LAZCANO ◽  
M. T. S. NAIR ◽  
P. K. NAIR
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Band Gap ◽  
Deposition Method ◽  
Photovoltaic Devices ◽  
Large Area ◽  
Electrical And Optical Properties ◽  
Ternary Compounds ◽  
Glass Substrates ◽  
Different Temperatures

The possibility of generating ternary compounds through annealing thin film stacks of binary composition has been demonstrated before. In this work we report a method to produce large area coating of ternary compounds through a reaction in solid state between thin films of Sb2S3 and CuS. Thin films of Sb2S3 -CuS were deposited on glass substrates in the sequence of Sb2S3 followed by CuS (on Sb2S3 ) using chemical bath deposition method. The multilayer stack, thus produced, of approximately 0.5 μm in thickness, where annealed under nitrogen and argon atmospheres at different temperatures to produce films of ternary composition, CuxSbySz . An optical band gap of ~1.5 eV was observed in these films, suggesting that the thin films of ternary composition formed in this way are suitable for use as absorber materials in photovoltaic devices. The results on the analyses of structural, electrical and optical properties of films formed with different combinations of thickness in the multilayers will be discussed in the paper.

scholarly journals Preparation and Characterization of NiZn Ferrite Thin Films by a Spray Pyrolysis Deposition Method.

2002 ◽  
Vol 110 (1286) ◽  
pp. 916-920 ◽  
Author(s):  
Akio TAKAYAMA ◽  
Kazumasa KONDO ◽  
Masayuki OKUYA ◽  
Shoji KANEKO
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Deposition Method ◽  
Spray Pyrolysis Deposition ◽  
Ferrite Thin Films

Fabrication of a dye-sensitized solar cell module using spray pyrolysis deposition of a TiO2 colloid

RSC Advances ◽  
2014 ◽  
Vol 4 (44) ◽  
pp. 23299-23303 ◽  
Author(s):  
T. G. Deepak ◽  
G. S. Anjusree ◽  
K. R. Narendra Pai ◽  
Devika Subash ◽  
Shantikumar V. Nair ◽  
...  
Keyword(s):  
Solar Cell ◽  
Spray Pyrolysis ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Spray Pyrolysis Deposition ◽  
Cell Module ◽  
Solar Cell Module

The photovoltaic performance of a dye-sensitized solar cell module (12 cm × 12 cm) fabricated by spray pyrolysis deposition (SPD) of a TiO2 colloid.

scholarly journals Effect of Annealing Temperature in Improvement the Optical Properties of TiO2 Doped Fe2O3 to Use in Thin Film

2019 ◽  
pp. 1-12
Author(s):  
Abubakr Mahmoud Hamid ◽  
Hassan Wardi Hassan ◽  
Fatima Ahmed Osman
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Refractive Index ◽  
Optical Properties ◽  
Iron Oxide ◽  
Titanium Oxide ◽  
Extinction Coefficient ◽  
Tio2 Thin Film ◽  
Annealing Temperature ◽  
Spray Pyrolysis Deposition

Solar energy is already has being widely successfully used in residential and industrial setting for thermal and electrical application such as space technology, communication, etc. I. Aims: The aim of this study the effect of the annealing temperature in improvement optical properties of titanium oxide nanostructure doped iron oxide for use in thin film. Study Design: The spray pyrolysis deposition method used for preparation the nanostructure material. Place and Duration of Study: This study was conducted in department of physics and department of materials sciences, Al-Neelain University, between January 2016 and January 2019.  Methodology: Thin films of Titanium Oxide (TiO2) doped Iron Oxide (Fe2O3) have been prepared by chemical spray pyrolysis deposition technique. A laboratory designed glass atomizer was used for spraying the aqueous solution. Which has an output nozzle about 1 mm. then film were deposited on preheated cleaned glass substrates at temperature of 400°C. we used different concentration to study optical parameters. A 1.5 g TiO2 powder of anatase structure doped with 1.5 g of Fe2O3 was mixed with 2 ml of ethanol and stirred using a magnetic stirrer for 30 minutes to form TiO2 paste to obtain the starting solution for deposition and spray time was 10 s and spray interval 2 min was kept constant. The carrier gas (filtered compressed air) was maintained at a pressure of 105 Nm-2, and distance between nozzle and substrate was about 30 cm ± 1 cm. Thickness of sample was measured using the weighting method and was found to be around 400nm. Optical transmittance and absorbance were record in wavelength range of (200-1100) nm using UV-Visible spectrophotometer (Shimadzu Company Japan). Results: The results obtained showed that the optical band gap decreased from 5.6eV before annealing to (3.9, 3.26, 3.24 and 3.27 eV) after annealing temperature at(450° – 500°) for TiO2:Fe2O3 thin films, this result refer to the broadening of  secondary levels that product by TiO2: doping to the Fe2O2thin films. Also the results showed the variation of refractive index with wavelength for different concentration after annealing temperature at (450° – 500°) of TiO2: Fe2O3 films from this figure, it is clear that n decrease with low concentration and increase with high concentration after annealing temperature that mean the density is decreased of this films. In addition the extinction coefficient of TiO2:Fe2O3 thin films recorded before annealing and with different concentration (1.1, 1.2, 1,5 and 1,6) and in the range of (300 – 1200) nm and at annealing temperature from (450° – 500°). It observed from that the extinction coefficient, decrease sharply with the increase of wavelength for all prepared films and all the sample after annealing is interference between them accept the sample before annealing is far from the other sample. Conclusion: The TiO2 thin film shows better result after annealing; By exposing temperature during annealing process degree at (450o- 500o) is found to be the best temperature for annealing TiO2 thin film. The study concluded that an annealing temperature Contributes to the improvement of optical properties related to increasing the efficiency of the solar cell, especially the refractive index, energy gap, extinction coefficient.

scholarly journals Spray Pyrolysis Deposition and Effect of Annealing Temperature on Optical Properties of Cu:NiO Film

2015 ◽  
Vol 47 ◽  
pp. 178-184 ◽  
Author(s):  
Khalid Haneen Abass
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Spray Pyrolysis Method ◽  
Spectral Transmittance ◽  
Pyrolysis Method ◽  
Spray Pyrolysis Deposition ◽  
Uv Visible

Spray pyrolysis method that used to prepare Cu:NiO thin films onto glass substrate with various annealing temperature. Spectral transmittance of prepared thin films determined by UV-Visible spectrophotometer in the range of (380-900) nm. The transmittance decreased with increasing annealing temperature. While the absorption coefficient and extinction coefficient increased with increasing annealing temperature. Energy gap decreased from 2.9 eV before annealing to 2.78 eV after 500 °C annealing temperature.

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