Effect of SILAR Cycles on the Thickness, Structural, Optical Properties of Cobalt Selenide Thin Films

N.J, Egwunyenga; V.C, Onuabuchi; Okoli, N. L.; I.E, Nwankwo

doi:10.34256/irjmt2141

Cited by 2 publications

(3 citation statements)

References 29 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The two theta gross angles were determined from the diffractogram, while the FWHM, miller indices, and the d-spacing were as well assessed. The crystalline size (D) was calculated using the Debye-Scherrers's equation of the form: (1) as adapted below; (Egwunyenga et al . , 2021).…”

Section: Characterization Techniquementioning

confidence: 99%

Optical Properties of Natural Dye Leaf Extracts and Nanostructured TiO2 Particles as Photosensitizers for Dye-Sensitized Solar Cells

J.C

2024

JEET

View full text Add to dashboard Cite

A threat to the energy production in the world is emerging mainly because of the shortage of energy resources and world industrialization. Although the cost factor is also a problem here, the future of solar energy is now growing and its conversion efficiency is also increasing. An important realization that can be made is that a dye-sensitized solar cell is a means of refining solar energy conversion technology, in which the use of wide bandgap semiconductors is based on photocurrent. Among the elements of the dye –sensitized solar cell, the dye as a sensitizer determines the performance of the cell. Common natural dyes are obtained from leaves, flower petals, and roots for instance. Considering the aspect of simplicity and cost of natural dyes, less complex extraction process than synthetic dyes and being friendly to the environment, researchers are striving to find ways of replacing the synthetic dyes with natural dyes. Here, TiO2 was prepared with the Sol-gel spin coating method with titanium tetraisopropoxide, isopropanol, acetic acid, and deionized water as precursors. The results showed that there was changes in the optical properties like transmittance, reflectance, and bandgape energy when the dye leave extract of Mangifera Indica, Manihot Esculenta, and Hibiscus Sabdariffa was examined. Morphological and compositional properties of the nanostructured TiO2 are also ascertained.

show abstract

Section: Characterization Techniquementioning

confidence: 99%

Optical Properties of Natural Dye Leaf Extracts and Nanostructured TiO2 Particles as Photosensitizers for Dye-Sensitized Solar Cells

J.C

2024

JEET

View full text Add to dashboard Cite

show abstract

“…Thicknesses (t) of the deposited thin films were evaluated using the gravimetric method given in equation ( 1) by [24][25].…”

Section: Thickness Measurementmentioning

confidence: 99%

“…The diffraction spectra showed an increase in intensity as deposition time increases and a slight peak shift towards higher angles was observed as shown in Table 2. Structural parameters such as crystallite size, dislocation density, and micro-strain were estimated using equations (2), (3), and (4) as presented by [24,[30][31][32]. The crystallite sizes (D) were evaluated using Debye-Scherrer's formula as shown in equation ( 2…”

Section: Structural Analysismentioning

confidence: 99%

Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time

Ezenwaka

Okoli²,

Okereke

et al. 2021

Nanoarchitectonics

Self Cite

View full text Add to dashboard Cite

Time optimized cobalt-doped zinc selenide thin films have been successfully electrodeposited on fluorine-doped tin oxide substrates. The films were deposited at the varying time of 1 min, 3 mins, and 5 mins respectively. Film thickness, optical, structural, electrical, and morphological properties of the deposited thin films were evaluated. Film thickness estimated using the gravimetric method increased from 294.35 nm to 399.62 nm as deposition time increased. Optical properties showed that the absorbance of the films ranged from 13.58% to 83.15% and was found to increase as deposition time increased. Transmittance ranged from 24.40% to 73.15% and was found to decrease as deposition time increased. The reflectance of the films was found to be low while the energy band gap ranged between 2.10 eV and 2.85 eV. Structural properties confirmed the deposition of ZnSe thin film with crystallite size values that fall between 14.68 nm and 18.60 nm. Dislocation density is ranged from 4.66 × 1015 lines/m2 to 2.97 × 1015 lines/m2 while microstrain ranged between 8.53 × 10-3 and 5.83 × 10-3. Crystallite sizes of the films were found to increase as deposition time increased while dislocation density and microstrain were found to decrease as deposition time increased. Electrical properties showed that the deposited films are semiconducting films with electrical resistivity values of 1.54 × 105 Ω cm-1.83 × 104 Ω cm and electrical conductivity values of 6.30 × 10-6 S/cm-5.47 × 10-5 S/cm. The micrograph of the films showed that the films were made up of nanoparticles and nanofibres of different dimensions. Energy-Dispersive X-Ray Spectroscopy (EDS) spectra of the films confirmed the presence of cobalt, zinc, and selenium.

show abstract

Effect of SILAR Cycles on the Thickness, Structural, Optical Properties of Cobalt Selenide Thin Films

Cited by 2 publications

References 29 publications

Optical Properties of Natural Dye Leaf Extracts and Nanostructured TiO2 Particles as Photosensitizers for Dye-Sensitized Solar Cells

Optical Properties of Natural Dye Leaf Extracts and Nanostructured TiO2 Particles as Photosensitizers for Dye-Sensitized Solar Cells

Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time

Contact Info

Product

Resources

About