Article
Energy & Fuels
Cristina L. Pinto, Inaki Cornago, Alicia Buceta, Eugenia Zugasti, Jaione Bengoechea
Summary: Randomly distributed subwavelength structures (SWSs) with excellent broadband anti-reflective properties were fabricated using self-masking reactive ion etching (RIE) process. The optical and topological characteristics of these structures were characterized using a spectrophotometer and a scanning electron microscope (SEM). The influence of topological parameters on the anti-reflective response was analyzed through modeling and simulation, and the best SWS was selected based on its omnidirectional behavior.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Physical
R. Ichwani, V Uzonwanne, A. Huda, R. Koech, O. K. Oyewole, W. O. Soboyejo
Summary: Understanding the interfacial robustness of multilayer structures in perovskite solar cells (PSCs) is crucial for the design of robust PSCs. In this study, force microscopy was used to quantify the adhesive interactions between adjacent layers of PSCs and correlate them with device performance. The results show that high adhesion forces in solution-processed PSCs contribute to improved charge carrier transport and higher photoconversion efficiencies.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Cristina L. Pinto, Inaki Cornago, Alicia Buceta, Eugenia Zugasti, Jaione Bengoechea
Summary: Glass samples were processed using a single-step self-masking RIE process to create random subwavelength structures (SWSs), which mimic natural anti-reflective and anti-soiling patterns. These SWSs on glass exhibit excellent broadband omnidirectional anti-reflective (AR) properties and enhance the surface roughness, improving wettability and anti-soiling performance. The performance improvement of photovoltaic devices using these structured glasses as front cover was evaluated.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Physical
Thomas M. Mercier, Tasmiat Rahman, Chirenjeevi Krishnan, Edris Khorani, Peter J. Shaw, Michael E. Pollard, Stuart A. Boden, Pavlos G. Lagoudakis, Martin D. B. Charlton
Summary: Reduction of surface reflection loss is crucial for high efficiency next generation Si solar cells, and surface texturing provides a viable method to achieve this. Through optimization of geometric parameters, 12-fold photonic quasi crystal lattice is found to provide the best anti-reflectance performance. The study validates the fabrication of photonic crystals and the effectiveness of FDTD simulation methodology.
Article
Energy & Fuels
Zain ul Abdin, Irfan Qasim, Owais Ahmad, Muhammad Rashid
Summary: Perovskite solar cells are cost-effective and stable in the global photovoltaic industry, with unique electronic and optical properties. Numerical investigations in this study designed novel solar cell configurations and optimized performance, exploring the impact of various electron transport materials on efficiency.
Article
Chemistry, Multidisciplinary
Gideon Oyibo, Thomas Barrett, Sharadh Jois, Jeffrey L. Blackburn, Ji Ung Lee
Summary: This study presents an all-semiconducting single-walled carbon nanotube device with a tandem geometry that models the process of photosynthesis. By separating the light absorption and power generation processes using distinct chirality and bandgap single-walled carbon nanotubes, the device captures photons from multiple regions of the solar spectrum and enhances the photoresponse.
Article
Chemistry, Multidisciplinary
Xiaoran Ma, Bairui Du, Shengwang Tan, Haiying Song, Shibing Liu
Summary: The study used the FDTD method to simulate the spectral selectivity of micro-nano grating on an Au surface and found that the depth, period, and structure of the grating have significant impacts on the spectral response to incident light.
Article
Biochemistry & Molecular Biology
Xiangjing Guo, Haiying Song, Bairui Du, Shengwang Tan, Shibing Liu
Summary: This study simulates the spectral properties of periodic array structures on the Au surface, and investigates the response characteristics of different surface structural parameters to incident light. The results show that these structures have a modulation function on the reflectivity and transmittance of the material surface, and wavelength selectivity can be achieved by adjusting the structural parameters.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Ehsan Shaghouli, Nosrat Granpayeh, Negin Manavizadeh
Summary: A combined structure of silver fractal-like nano-particles and leaky wave nanoantennas is proposed for ultra-thin silicon solar cells. The nano-cuboid pattern embedded in the anti-reflective coating enhances photon absorptions by utilizing different optical modes and increases the electric field in the upper region of the absorber layer. The hybrid plasmonic mode in the optical nanoantenna structure focuses and directs incoming light, improving photon absorptions at long wavelengths.
RESULTS IN PHYSICS
(2023)
Article
Energy & Fuels
Suneet Kumar Agnihotri, D. Prashant, D. P. Samajdar
Summary: This paper investigates the optical and electrical behavior of three different nanostructure geometries in InP solar cells and proposes a hybrid hexagonal pyramidal nanowire structure with better absorption and higher conversion efficiency. Simulation and electrical analysis show that the proposed structure outperforms the other two structures in terms of generation rate and power conversion efficiency.
Article
Chemistry, Multidisciplinary
Thanakorn Yeamsuksawat, Luting Zhu, Takaaki Kasuga, Masaya Nogi, Hirotaka Koga
Summary: In this study, the researchers produced chitin nanopaper with subwavelength nanoporous structures by controlling the drying and carbonization process. The carbonized chitin nanopaper exhibited improved solar absorption and solar thermal heating performance, highlighting its potential as an excellent solar thermal material. The nitrogen-doped carbon structures and high morphological stability of chitin nanofibers contributed to the enhanced solar absorption.
Article
Energy & Fuels
Giovan Battista Cavadini, Lauren M. Cook
Summary: The study shows that in a flat rooftop PV installation near Zurich, Switzerland, green roofs can increase annual PV energy yield by 1.8% on average compared to conventional roofs, while cool roofs can increase it by 3.4%. Results indicate that cool roofs outperform green roofs in terms of boosting PV energy yield.
Article
Energy & Fuels
Ehab Awad
Summary: Concentration photovoltaics utilize small-area solar cells to focus solar energy and achieve high efficiency at a reasonable cost. This study proposes an array of gold plasmonic concentrator cells that can nano-focus solar radiation to a spot size of 60 nm. It works over a wide solar energy bandwidth up to 2400 nm wavelength, surpassing the maximum operating wavelength of conventional solar cells. The concentrator consists of a coaxial waveguide and a tapered section for plasmonic nano-focusing, followed by a straight waveform section with integrated graphene metamaterial for optical absorption.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Ashish Prajapati, Jordi Llobet, Patricia C. Sousa, Helder Fonseca, Carlos Calaza, Gil Shalev
Summary: The study focuses on the utilization of deep subwavelength features to decrease broadband and omnidirectional reflection of the solar spectrum, achieving over 80% reflection decrement. Various surface silicon arrays incorporating features such as nanopillar arrays, quasinanolens, and deep subwavelength sidewall scalloping result in significant reductions in reflection, with additional exploration of possible light-trapping mechanisms numerically.
Article
Materials Science, Multidisciplinary
G. Mallik, A. Kabiraj, P. P. Dash, P. Kumari, P. K. Sahoo, Utkalika P. Sahoo, S. Rath
Summary: Hydrothermally grown SnO2 hierarchical trichome nano-flowers (T-NFLs) show improved electronic properties and solar cell efficiency compared to nano-flakes (NFs).
Article
Chemistry, Physical
Saeid Asgharizadeh, Masoud Lazemi, Seyed Mohammad Rozati, Mark Sutton, Stefano Bellucci
Summary: The spray pyrolysis technique was used to deposit two sets of ultra-thin tin dioxide (SnO2) layers. The study found that precursor concentration and volume affect the layer structure, and there is a relationship between electron density and resistivity. The conductivity of ultra-thin layers is influenced by the quantum size effect, while surface roughness plays different roles in different samples.
SURFACE AND INTERFACE ANALYSIS
(2021)
Article
Materials Science, Ceramics
Mohammad Bagher Askari, Seyed Mohammad Rozati, Parisa Salarizadeh, Sadegh Azizi
Summary: Co3O4-Ni3S4 (CN) and Co3O4-Ni3S4-rGO (CNR) nanohybrids were synthesized and their synergistic effect as supercapacitor electrode materials was investigated. The results showed that CN and CNR materials exhibited high specific capacitance and cyclic stability, making them promising options for cheap and attractive supercapacitor electrodes.
CERAMICS INTERNATIONAL
(2022)
Article
Electrochemistry
Reihane Etefagh, Seyed Mohammad Rozati, Ahmad Ahmadi Daryakenari, Fatemeh Poursalehi, Majid Karami Keshmarzi
Summary: This study investigated the effect of manganese doping on lithium manganese-rich nickel-manganese-cobalt oxides (LMR-NMCs) cathode materials. Li-1.21[Mn0.54-xNi0.125Co0.125]InxO2 materials were prepared using a sol-gel approach, and their structural, chemical, and thermal properties were examined. The experimental results showed that an appropriate indium doping level of x = 0.015 significantly improves the cycling stability and charge/discharge capacity of the electrode.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Physics, Condensed Matter
Sahar Soltani, Seyed Mohammad Rozati, Mohammad Bagher Askari
Summary: A spinel cubic Co3O4 nanostructured thin film was successfully deposited on a preheated FTO substrate using a simple and inexpensive spray pyrolysis method. The film exhibited small grain size and stable electrochemical properties, showing promising potential for various applications.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
H. Fayaz Rouhi, S. M. Rozati
Summary: In this article, Tellurium doped zinc oxide thin films were prepared using a simple spray pyrolysis technique. The effects of Te doping concentration on the crystal structure, surface morphology, and optical properties of the films were investigated.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Mohammad Bagher Askari, Seyed Mohammad Rozati
Summary: This study successfully synthesized a three-component nanocatalyst composed of cobalt oxide, nickel sulfide, and reduced graphene oxide, and reported their application in alcohol fuel cells. The addition of reduced graphene oxide increased the specific surface area and electrical conductivity of the nanocatalyst, resulting in improved efficiency in the methanol and ethanol electrooxidation processes. Furthermore, the CNR nanocatalyst exhibited high stability in the oxidation reactions of methanol and ethanol.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Mohammad Bagher Askari, Seyed Mohammad Rozati, Antonio Di Bartolomeo
Summary: In this study, a new nanocatalyst, Mn3O4-CeO2-rGO, was synthesized and evaluated for the methanol oxidation reaction. The results demonstrated that the nanocatalyst exhibited high oxidation current density and stability, making it a promising and efficient catalyst for the methanol oxidation reaction.
Article
Chemistry, Physical
Hassan Zare Asl, Seyed Mohammad Rozati
Summary: CuO:In2O3 nanocomposite thin films were successfully prepared by adding different weight percentages of indium chloride. The addition of In2O3 considerably improved the conductivity and electrochemical performance of the films, but excessive growth of In2O3 could limit ion storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Correction
Electrochemistry
Reihane Etefagh, Seyed Mohammad Rozati, Ahmad Ahmadi Daryakenari, Fatemeh Poursalehi, Majid Karami Keshmarzi
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Review
Materials Science, Multidisciplinary
Seyed Mohammad Rozati, Seyed Ashkan Moghadam Ziabari
Summary: This review investigates various types of single-layer, bilayer and multilayer TCO materials, their optical and electrical properties, deposition techniques, and applications. Manipulation of effective parameters like doping, growth method, and temperature can change the electrical and optical properties of TCO, helping researchers to improve their performance in desired contexts.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Mohammad Bagher Askari, Sadegh Azizi, Mohammad Taghi Tourchi Moghadam, Majid Seifi, Seyed Mohammad Rozati, Antonio Di Bartolomeo
Summary: The demands for alternative energy have driven the research on effective electrocatalysts in fuel cells. This study presents new nanocatalysts based on two binary transition metal oxides and reduced graphene oxide for methanol oxidation. The introduction of reduced graphene oxide significantly improves the electrocatalytic properties of the catalysts. The nanocatalysts exhibit promising performance for methanol fuel cell anodes, with high current density, low overvoltage, and good cyclic stability.
Article
Chemistry, Physical
Hassan Zare Asl, Seyed Mohammad Rozati
Summary: This study investigated the influence of Zn doping on the electrochemical properties of Co3O4 thin films. First, an FTO film was spray-deposited onto a glass substrate. Then, undoped and Zn-doped Co3O4 thin films with different concentrations were spray-deposited onto the FTO film. The areal capacitance and resistance of the prepared cells were analyzed using cyclic voltammetry and Nyquist plot.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Tohid Ganj, Seyed Mohammad Rozati, Yashar Azizian-Kalandaragh, Golamreza Pirgholi-Givi, Semsettin Altindal
Summary: In this paper, cerium-oxide nanostructures were synthesized using the hydrothermal method and fabricated into different types of SBDs to study the effects of organic interlayers on electrical properties and conduction mechanisms. The properties of the nanostructures were analyzed using various characterization methods, and the results showed that the average crystallite size was around 30-40 nm. The presence of the organic interlayer improved the performance of the SBDs by decreasing the surface state energy levels and changing the conduction mechanism.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Tohid Ganj, S. M. Rozati, Yashar Azizian-Kalandaragh, Gholamreza Pirgholi-Givi
Summary: In this research, Au-PVC-Si (MPS1), Au-(CeO2: PVC)-Si (MPS2) Schottky barrier diodes (SBDs) grown on n-type silicon (n-Si) were studied to investigate the frequency dependence and the effect of polymer interlayer on dielectric parameters. The results showed that the dielectric parameters are sensitive to frequency, especially in the low-frequency range. The presence of the PVC and (PVC: CeO2) interlayer increased the dielectric constant and conductivity compared to MS-type SBDs.
Article
Physics, Condensed Matter
Sahar Soltani, Seyed Mohammad Rozati, Mohammad Bagher Askari
Summary: The effect of Mn doping on the structural, surface morphology, and optical properties of Co3O4 and Mn: Co3O4 thin films were investigated in this study. The results showed that Mn doping changed the surface structure of Co3O4 and significantly affected the optical properties of the films. In addition, increasing the Mn concentration decreased the resistance of the films.
MICRO AND NANOSTRUCTURES
(2022)
