Papers by Olusola Akinrinola
Book Publisher International (a part of SCIENCEDOMAIN International), Nov 20, 2021
International journal of engineering technologies, Jan 29, 2021
One of the most reliable renewable energy source is the solar energy from the sun. However, most ... more One of the most reliable renewable energy source is the solar energy from the sun. However, most materials have been unable to meet their potentials as a good absorber layer in thin films. Most recently, Cu2ZnSnS4 (CZTS) have been identified as a good absorber layer, yet the same problem persists. In this study, we examined the depletion capacitance visa -vis the voltage and range of frequencies based on heterojunction types and structures. The modeled solar cell consisted three types of materials used as buffer layer (BL) (ZnO:Al (AZO), In2S3 (IS) and CH3NH3PbCl3 (PVKT)). The band gap model of n/n/p anisotype heterojunction for the three BLs were constructed from the obtained data of the simulated solar cells. The band offsets ∆EC and ∆EV in electron-volts at n/n for AZO, IS and PVKT are; 0.07071 and 0.18794, 0.09768 and 0.72367 and 0.67541 and 2.54541 respectively. Also, at n/p ∆EC and ∆EV for AZO, IS and PVKT are; 0.14251 and 1.93251, 0.49011 and 1.73011 and 0.34041 and 1.73920 respectively. Based on the trivial AC signal that was superimposed on the dc biased charges, AZO and IS shows an exponential response of the capacitance reliance on the voltage across the depletion region. The Capacitance spectroscopy of this solar cell showed that anisotype heterojunction may be manipulated to make use of the voltage reliance on junction capacitance when the need to electronically vary it arises.
FUDMA JOURNAL OF SCIENCES - ISSN: 2616-1370, Nov 8, 2019
It has been well established in this research work that sulphide ion play a crucial role in chalc... more It has been well established in this research work that sulphide ion play a crucial role in chalcogenide semiconductor devices. The impact of sulphide ion content (S 2- ) on the surface morphology, optical, electrical and micro-structural properties of chemically deposited CdZnS nanoparticles was examined. The nanoparticles were prepared using cadmium sulphate as Cd 2+ source, zinc sulphate as Zn 2+ source and thiourea as S 2- source. NH 4 OH was used as the complexing agent. The thiourea concentration was varied between 0.075 M – 0.580 M while the concentration of ZnSO 4 , CdSO 4 and NH 4 OH were fixed. EDX was used to confirm the compositional elements of the nanoparticles which are Cd 2+ , Zn 2+ , S 2- and little content of Si and O 2 . polycrystallinity compare to S 2- -poor CdZnS samples which exhibit better polycrystallinity. The crystallite size varied between 10 nm to 52 nm. The dislocation density increases from 0.000852 to 0.00242 Line 2 /m 2 and then decreased to 0.000364 Line 2 /m 2 . Other microstructural properties such as lattice parameter and micro-strain as well as their relation with grain boundary surface area were also discussed. The best transmittance of about 97% was revealed. The layers deposited with high S 2- content showed less percentage transmittance and exhibit narrow energy band gap. The electrical resistivity is decreased while electrical conductivity increases with increasing S 2- content. The sheet resistance, charge carrier mobility and charge carrier density were also discussed.
Zenodo (CERN European Organization for Nuclear Research), Feb 3, 2022
Phyto-electricity is the process of generating or getting energy from green plants by using them ... more Phyto-electricity is the process of generating or getting energy from green plants by using them as an electrolyte and inserting different metal plates in them to act as electrode in other to tap into the energy embedded in them and converting them to useful electric energy. Nowadays generating electricity from green plant has become very popular, but phyto-electric power generation has not been able to supply substantial energy to humans and this is due to the low electron in the plants used to generate electricity. In past research people have used trees to generate electricity. The phyto-electric power system works on same principle as the battery. In this design potato will be used as a source of power or as the green plant the battery which is filled with electrolytes, the more the electrolyte the higher the voltage that is readily available to be used, in other to be able to savor the power from the potato two dissimilar metals was used and the metals used were iron and zinc. After completing all of the paper design and analysis, the project was implemented, built, and tested to guarantee that it functioned properly. Electricity was generated and it was used to power a LED, the total resistance of the wire is 1Ω, there is also voltage loss across each node. This project was a success, but more research still needs to be done. And this project is a prove that energy are available in our surroundings, they are just needed to be investigated and further researched and there are more areas of energy and technology development that are yet to be addressed that are various problems faced by man in his day to day activities.
Journal of Advanced Mechanical Engineering Applications
MXene, a two-dimensional nanomaterial, has an impressive range of properties that make it a perfe... more MXene, a two-dimensional nanomaterial, has an impressive range of properties that make it a perfect choice for a variety of applications, including energy systems, high-tech sensors, optics, medical devices, and electromagnetic interference shielding. Its high carrier mobility, metallic electrical conductivity, superior transparency, excellent mechanical characteristics, and tunable work function have drawn much attention. This review examines the utilization of MXene in solar technology, highlighting its potential as an electrode, charge carrier, and additive in quantum dot-sensitized, perovskite, silicon wafer-based, and organic solar cells. Additionally, a summary table is provided that briefly outlines the different methods of synthesizing MXene and their respective etching chemicals and precursors. This review’s latter part looks at the challenges associated with MXene and offers potential solutions and prospects.
International Journal of Engineering Technologies IJET, 2021
One of the most reliable renewable energy source is the solar energy from the sun. However, most ... more One of the most reliable renewable energy source is the solar energy from the sun. However, most materials have been unable to meet their potentials as a good absorber layer in thin films. Most recently, Cu2ZnSnS4 (CZTS) have been identified as a good absorber layer, yet the same problem persists. In this study, we examined the depletion capacitance visa -vis the voltage and range of frequencies based on heterojunction types and structures. The modeled solar cell consisted three types of materials used as buffer layer (BL) (ZnO:Al (AZO), In2S3 (IS) and CH3NH3PbCl3 (PVKT)). The band gap model of n/n/p anisotype heterojunction for the three BLs were constructed from the obtained data of the simulated solar cells. The band offsets ∆EC and ∆EV in electron-volts at n/n for AZO, IS and PVKT are; 0.07071 and 0.18794, 0.09768 and 0.72367 and 0.67541 and 2.54541 respectively. Also, at n/p ∆EC and ∆EV for AZO, IS and PVKT are; 0.14251 and 1.93251, 0.49011 and 1.73011 and 0.34041 and 1.73920 respectively. Based on the trivial AC signal that was superimposed on the dc biased charges, AZO and IS shows an exponential response of the capacitance reliance on the voltage across the depletion region. The Capacitance spectroscopy of this solar cell showed that anisotype heterojunction may be manipulated to make use of the voltage reliance on junction capacitance when the need to electronically vary it arises.
It has been well established in this research work that sulphide ion play a crucial role in chalc... more It has been well established in this research work that sulphide ion play a crucial role in chalcogenide semiconductor devices. The impact of sulphide ion content (S 2- ) on the surface morphology, optical, electrical and micro-structural properties of chemically deposited CdZnS nanoparticles was examined. The nanoparticles were prepared using cadmium sulphate as Cd 2+ source, zinc sulphate as Zn 2+ source and thiourea as S 2- source. NH 4 OH was used as the complexing agent. The thiourea concentration was varied between 0.075 M – 0.580 M while the concentration of ZnSO 4 , CdSO 4 and NH 4 OH were fixed. EDX was used to confirm the compositional elements of the nanoparticles which are Cd 2+ , Zn 2+ , S 2- and little content of Si and O 2 . polycrystallinity compare to S 2- -poor CdZnS samples which exhibit better polycrystallinity. The crystallite size varied between 10 nm to 52 nm. The dislocation density increases from 0.000852 to 0.00242 Line 2 /m 2 and then decreased to 0.000364...
Research Trends and Challenges in Physical Science Vol. 5, 2021
This study is a review of risk-related information on graphene with the purpose of outlining pote... more This study is a review of risk-related information on graphene with the purpose of outlining potential environmental and health risks. It is a guide to future risk-related research on graphene. The study will be based on the emissions, environmental fate, and toxicity of graphene. It shows that graphene could exert a considerable toxicity, emission of graphene from electronic devices and composites are possible in the future. It is known that graphene is both persistent and hydrophobic. Although these results indicate that graphene may cause adverse environmental and health effects, and that there are many risk-related knowledge gaps to be filled with the environment. Graphene can bind the cell surface and cause physical and chemical damage to the cell membrane. It is known that graphene may interact with protein and nucleic acids, altering their structure and function on the other hand, graphene may regenerate reactive oxygen species (ROS) which can also cause disruption of membran...
TURKISH JOURNAL OF PHYSICS, 2018
In this research work, a solar cell capacitance simulator (SCAPS-1D) was used in the modeling and... more In this research work, a solar cell capacitance simulator (SCAPS-1D) was used in the modeling and simulation of sandwiched perovskite solar cells (PSCSs) with a planar heterojunction structure in the arrangement of the sandwiched model (FTO/ZnO/CZTS/PSCS/CZTS/HTM). Two different configurations, 121 and 111, of the sandwiching absorber layer of the device were simulated and compared with the perovskite without sandwiching, using an absorber layer of step length thickness of 25 nm, and varied from 100 nm to 500 nm. The band gap diagram, I-V characteristics curve, and other parameters were constructed. The best configuration for better performance was then determined, from which further simulations were carried out. Efficiency of 22.57% was achieved, which shows that having a combination of two different absorbers was achievable with considerable photon conversion efficiency.
Journal of Semiconductors, 2017
Objective(s): The present study aimed to investigate the antibacterial and anti-biofilm potential... more Objective(s): The present study aimed to investigate the antibacterial and anti-biofilm potential of the nonoxidized form of zinc nanoparticles (Zn NPs) prepared by a 'green approach' using the Lavandula vera extract with microwave irradiation. Materials and Methods: After synthesis of Zn NPs, the microdilution and disk diffusion methods was applied for antimicrobial evaluation followed by anti-biofilm activity measurement using crystal violet colorimetric assay procedure. Results: The obtained results demonstrated the production of spherical Zn NPs within the size range of 30-80 nanometers. The measured minimum inhibitory concentration of the Zn NPs and ZnSO4 against the biofilm-producing and clinically isolated pathogens of Staphylococcus aureus, Pseudomonas aeruginosa, and Proteus mirabilis was estimated to be more than 2560 µg/ml. In addition, a non-significant increase (P>0.05) was observed in the antibacterial activity against methicillin-resistant S. aureus after the addition of the Zn NPs (500 µg/disk) to the antibiotic discs containing tobramycin, erythromycin, tetracycline, azithromycin, and kanamycin compared to ZnSO4. On the other hand, the Zn NPs significantly decreased the biofilm formation of P. mirabilis compared to P. aeruginosa (P<0.05). Biofilm formation by S. aureus also reduced to 68.3±2.1% in the presence of the Zn NPs (640 µg/ml), which was considered significant compared to P. mirabilis and P. aeruginosa at the same concentration (P<0.05). Conclusion: To sum up, the biofilm inhibitory activity of Zn NPs at higher concentrations than 160 µg/ml against S. aureus and P. mirabilis was more significant compared to the inhibitory effects of ZnSO4. However, further investigations are required in order to determine the antibacterial and anti-biofilm mechanism of Zn NPs.
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Papers by Olusola Akinrinola