Article
Engineering, Electrical & Electronic
J. R. Ramos-Serrano, S. Alcantara-Iniesta, M. Acosta-Osorno, Ma Estela Calixto
Summary: This work explores the piezoelectric response of ZnO thin films deposited by ultrasonic spray pyrolysis with a preferential orientation at the c-axis. The results show that higher temperatures lead to improved crystalline film quality and grain size. The angular distribution of the crystals on the substrate plane deviates slightly from the normal at higher temperatures. Moreover, a prototype based on ZnO thin films was fabricated to measure the piezoelectric response, and samples with better crystallinity and high resistivity exhibit the most intense measured piezoelectric voltage.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Camila Ianhez-Pereira, Ariano De Giovanni Rodrigues, Marcio Peron Franco de Godoy
Summary: This study investigated the infrared optical emission of Er3+ doped ZnO hosts, using spray pyrolysis during thin film growth. Different molarity conditions affected the growth of the films and their optical properties. The infrared emissions were influenced by the Stark effect, which was dependent on synthesis parameters.
SCRIPTA MATERIALIA
(2021)
Article
Physics, Multidisciplinary
T. Gnanasekar, S. Valanarasu, Ramesh Ade, A. Vimala Juliet, V Ganesh, T. H. AlAbdulaal, Yugandhar Bitla
Summary: We investigated the co-doping effects of transition metal elements (Ni, Co) on the opto-electronic properties of CuO thin films. Our findings showed that co-doping significantly enhances the optical and electrical properties of the films.
Article
Chemistry, Physical
Hao Xiu, Tianshu Gao, Na An, Ying Wang, Yang Zhou, Xiaopeng Qi, Deyu Liu, Yongbo Kuang
Summary: A general solution method using citrate to prepare nanoporous oxide thin films with controllable porosity was reported. The impacts of morphology on photoelectrochemical performance were studied using CuBi2O4 as a model material. The synthesis technique can be applied to prepare crystallized nanoporous oxide thin films with tunable morphologies for photovoltaic and other catalytic applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Muhammad Rabeel, Sofia Javed, Ramsha Khan, Muhammad Aftab Akram, Shania Rehman, Deok-kee Kim, Muhammad Farooq Khan
Summary: In this study, zinc oxide thin films were synthesized on glass substrates using spray pyrolysis method to prepare self-cleaning glass. The process parameters were optimized to improve photocatalytic performance and surface properties. It was found that samples deposited at 250 degrees C had higher crystallinity and hydrophobicity, while using a 2 mL solution resulted in better surface coverage and roughness. Additionally, the spray distance controlled the particle size distribution and surface coverage of the samples.
Article
Physics, Condensed Matter
Safwat A. Mahmoud, Lamiaa Galal Amin, Alaa Ahmed Akl, Ahmed Dhahri
Summary: Non-crystalline and crystalline iron oxide thin films were produced on glass using spray pyrolysis at various temperatures. X-ray diffraction analysis confirmed the amorphous and crystalline characteristics of the films. The optical properties of the films were studied, revealing that the crystalline state exhibited lower refractive index and extinction coefficient compared to the amorphous state. These findings make the films potential candidates for applications in optoelectronics and spintronics electronics devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Basavaraj G. Hunashimarad, J. S. Bhat, P. Raghavendra, R. F. Bhajantri
Summary: The photoluminescence properties of spray pyrolyzed strontium (Sr) doped tin oxide (SnO2:Sr) thin films are greatly influenced by Sr doping, leading to a redshift in optical bandgap and an increase in visible emission intensity.
Article
Optics
Raghavendra Bairy, D. Haleshappa, M. S. Murari
Summary: The authors in this study presented the evaluation of structural and third-order nonlinear optical properties of lead-doped zinc oxide thin films. Through various analyses, it was found that the films exhibited enhanced optical properties with increasing doping content. Additionally, z-scan analysis revealed significant nonlinear optical effects, showcasing the potential of these thin films for optoelectronic device applications.
APPLIED PHYSICS B-LASERS AND OPTICS
(2021)
Article
Materials Science, Multidisciplinary
B. Kamecki, J. Karczewski, G. Cempura, P. Jasinski, S. Molin
Summary: This study reported the preparation of (Mn,Co,Fe,Ni,Cr)3O4 high-entropy spinel oxide thin film with a thickness of -500 nm using a facile spray pyrolysis technique. The structural and electrical properties of the film were characterized after heat treatment at temperatures ranging from 400-900°C. The as-deposited film was amorphous and crystallized at 500°C, showing a homogeneous elemental distribution and the desired Fd-3m cubic spinel structure. The electrical conductivity of the film was found to depend on the processing temperature, with the highest conductivity obtained at 700°C.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Electrical & Electronic
Paulosutty Abraham, Sadasivan Shaji, David Avellaneda Avellaneda, Josue Amilcar Aguilar-Martinez, Bindu Krishnan
Summary: In this study, in situ crystallized photoconductive Sb2S3 thin films were deposited using direct ultrasonic spray pyrolysis. First principles calculations were performed to study the vibrational and electronic band structures. A systematic study on the growth of thin films was conducted by varying substrate temperature and relative concentration of Sb/S. The results showed the formation of polycrystalline Sb2S3 films at 200 degrees C. Further treatments and analysis confirmed the optoelectronic properties of the films. The research offers a one-step process for obtaining polycrystalline photoconductive Sb2S3 thin films with potential optoelectronic applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
A. Ayana, Fei Hou, Jan Seidel, B. Rajendra, Pankaj Sharma
Summary: Nanostructured ZnO films have been synthesized on p-type silicon substrates using the chemical spray pyrolysis method. The study investigates the effects of deposition temperatures on the microstructural and piezoelectric properties of the films.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
A. M. Faramawy, Hamada Elsayed, Mohamed Sabry, H. M. El-Sayed
Summary: Cr-doped Co3O4 thin films were prepared by spray pyrolysis on soda-lima glass. The structure and morphology of the prepared samples were characterized by GIXRD, FTIR, and SEM. The results showed the formation of a single cubic spinel phase with a crystallite size of 6 nm. Optical absorption spectra revealed different electronic transitions and estimations of the band gap structure. The electrical resistivity was found to increase with increasing Cr content. Additionally, the resistivity decreased under visible illumination and increased under infrared illumination, with the sensitivity enhanced by increasing the Cr content. This work introduces a new application for Co3O4 material as a light detector.
Article
Physics, Condensed Matter
Sourav Bose, Christyves Chevallier, Sidi Ould Saad Hamady, David Horwat, Jean-Francois Pierson, Pascal Boulet, Thomas Gries, Thierry Aubert, Nicolas Fressengeas
Summary: ZnO films deposited on glass substrates using ultrasonic spray pyrolysis were systematically investigated for their optical, morphological, structural, and electrical properties. The films showed high transparency over a wide range of thicknesses due to their fast growth rate, making them suitable for various applications.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Chemistry, Physical
Thangavel Ravikumar, Logu Thirumalaisamy, Sridharan Madanagurusamy, Kalainathan Sivaperuman
Summary: Ammonia (NH3) production, storage, and transportation are susceptible to leaks, posing risks to the environment and human life. Detecting NH3 within the exposure limit is crucial for eliminating health hazards. Thin films of zinc ferrite (ZF) were deposited using spray pyrolysis at different substrate temperatures. The film deposited at 225 degrees C showed a good sensing response to 25 ppm of NH3 and exhibited stability over 90 days. This research demonstrates that ZF thin films can effectively detect NH3 in the environment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Khaoula Derrar, Mourad Zaabat, Nouhad Rouabah, Roshan Nazir, Faouzi Hanini, Abdelkader Hafdallah, Sher Afghan Khan, Norah Salem Alsaiari, Khadijah Mohammedsaleh Katubi, Khamael M. Abualnaja
Summary: The present study investigates the influence of pure and antimony-doped tin oxide thin films on their structural, optical, and electrical properties. It is found that the size and surface morphology of the doped films are affected by the dopant concentration, while the electrical properties depend on the dopant concentration.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Alexandru Enesca, Luminita Isac, Anca Duta
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Maria Visa, Luminita Isac, Anca Duta
APPLIED SURFACE SCIENCE
(2015)
Article
Thermodynamics
Ion Visa, Anca Duta, Mihai Comsit, Macedon Moldovan, Daniela Ciobanu, Radu Saulescu, Bogdan Burduhos
APPLIED THERMAL ENGINEERING
(2015)
Article
Materials Science, Ceramics
Mazabalo Baneto, Alexandru Enesca, Ciprian Mihoreanu, Yendoube Lare, Koffi Jondo, Kossi Napo, Anca Duta
CERAMICS INTERNATIONAL
(2015)
Article
Chemistry, Physical
Laura Maria Manceriu, Aline Rougier, Anca Duta
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Environmental Sciences
Maria Visa, Luminita Andronic, Anca Duta
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2015)
Article
Engineering, Environmental
Maria Visa, Cristina Bogatu, Anca Duta
JOURNAL OF HAZARDOUS MATERIALS
(2015)
Article
Physics, Condensed Matter
Kekeli N'Konou, Muthiah Haris, Yendoube Lare, Mazabalo Baneto, Kossi Napo, Philippe Torchio
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2016)
Article
Engineering, Chemical
Cristina Bogatu, Dana Perniu, Anca Duta
Article
Physics, Multidisciplinary
Kekeli N'Konou, Muthiah Haris, Yendoube Lare, Mazabalo Baneto, Kossi Napo
PRAMANA-JOURNAL OF PHYSICS
(2016)
Article
Energy & Fuels
Abdoul-Baki Tchakpedeou, Yendoube Lare, Kossi Napo, Arafat Fousseni
Summary: In this study, a new optimization approach based on the Levenberg-Marquardt algorithm (ImLM) is proposed to estimate the parameters of PV cells and modules and simulate their electrical behavior under all environmental conditions efficiently and accurately. Comparisons with other published methods show that the proposed approach gives not only a more accurate final solution but also a fast convergence speed and a better stability. Furthermore, tests on three PV modules of different technologies reveal that the proposed algorithm performs well at different irradiations and temperatures.
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Green & Sustainable Science & Technology
Kokou Amega, Yendoube Lare, Yacouba Moumouni
Summary: Urban areas' energy consumption plays a significant role in decoupling economic growth from greenhouse gases emissions. This study used a system dynamic approach to model the impact of energy efficiency on residential electricity consumption and carbon dioxide emissions reduction in the capital city of Togo.
Article
Energy & Fuels
Kokou Amega, Yendoube Lare, Yacouba Moumouni, Ramchandra Bhandari, Saidou Madougou
Summary: This study combines renewable energy (RE) penetration assessment with the development of typical meteorological year (TMY) for five cities. An integrated method is used to assess the RE status and generate TMY using the Sandia method. The TMY and long-term data (LT) are compared, and a statistical error analysis is conducted for a 3kWc output PV system using TMY and LT. The results show that only 11.27% of the power demand capacity was achieved through RE until 2020. The TMY and LT are close for all the towns, with better accuracy for Sokode. The PV system performance predicted by TMY is within 2% of the LT for all the sites. The study highlights the need for more investment in the RE sector due to its potential, including high solar radiation, average annual precipitation, and mean wind speed.
INTERNATIONAL JOURNAL OF SUSTAINABLE ENERGY
(2022)
Article
Energy & Fuels
Kokou Amega, Yendoube Lare, Ramchandra Bhandari, Yacouba Moumouni, Aklesso Y. G. Egbendewe, Windmanagda Sawadogo, Saidou Madougou
Summary: This study investigated the impact of climate change on the energy potential of photovoltaic cells in Togo. Results showed that PV potential may decrease due to climate change, with factors such as PV technology and geographical location playing a crucial role.
Proceedings Paper
Green & Sustainable Science & Technology
Zourkalaini Boubakar, Nathan Williams, Belko Abdoul Aziz Diallo, Yendoube Lare
Summary: Electrical energy plays a vital role in daily life, and understanding the growth of energy consumption is necessary for energy planning. This study investigates the dynamics of electricity consumption growth in Togo and finds that the average electricity consumption decreases as the electrification rate increases. This provides insights for utility and government in electricity access planning and can help reduce costs.
2022 IEEE PES/IAS POWERAFRICA CONFERENCE
(2022)
