Article
Chemistry, Physical
Paul Kant, Shengzhi Liang, Michael Rubin, Geoffrey Alan Ozin, Roland Dittmeyer
Summary: Solar-driven photocatalytic processes offer hopes and dreams for a sustainable future, utilizing carbon dioxide and water as feedstocks for energy and carbon production. However, low efficiencies and high costs are hurdles for scaling up photocatalytic processes. This contribution introduces a low-cost, panel-like photoreactor concept suitable for small-scale and large-scale solar farm applications, achieving high photocatalytic efficiency with a simple design. Optical modeling and analysis establish a design guideline, connecting parameters and performance metrics at a universal level for solar-driven photosynthesis.
Article
Engineering, Environmental
Amira Almansba, Abdoulaye Kane, Noureddine Nasrallah, Rachida Maachi, Lina Lamaa, Laure Peruchon, Cedric Brochier, Imane Bechohra, Abdeltif Amrane, Aymen Amine Assadi
Summary: The Double-Face configuration showed better photocatalytic performance compared to Mono-Face, and performed better in different water matrices. It also demonstrated good stability, reusability, and maintained its performance at pilot-scale. Additionally, the irradiation analysis indicated a homogenous distribution of light on the textile surface at both laboratory-scale and pilot-scale.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Seyed Masoud Parsa, Saba Momeni, Ahmadreza Hemmat, Masoud Afrand
Summary: The ongoing COVID-19 pandemic poses great challenges to water environments, with the presence of viral risks in wastewater samples, especially in areas lacking proper sanitation facilities. The widely used SODIS solar water disinfection method in developing countries may be less reliable in the current situation.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Miguel Martin-Somer, Maria Dolores Molina-Ramirez, Maria Luisa Perez-Araujo, Rafael van Grieken, Javier Marugan
Summary: This study examines how to optimize the efficiency of solar light utilization in various UV-based photochemical water treatment processes. The use of sunlight in compound parabolic collector (CPC) photoreactors is compared to using solar energy for electricity generation in photovoltaic (PV) power systems that power LED lighting sources. Seven different solar processes were investigated for chemical oxidation and bacterial inactivation. The results showed that the most efficient process for oxidation of chemicals is PV-UVC LED+H2O2, while the most efficient process for bacterial inactivation is PV-UVC LED+H2O2. The study highlights the need to evaluate the optimal approach in reactor engineering for water-energy applications, considering the current and future improvements in PV and LED technology.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Amirmohamad Soleymani Kooshan, Alireza Jalali, Seyed Farshid Chini
Summary: This paper discusses the traditional method of water disinfection and the development of ultraviolet (UV) radiation technology, as well as the potential of UV-LED technology in water treatment. The performance of cylindrical water disinfection UV-LED photoreactors made of UV reflective materials is analyzed using computational fluid dynamics (CFD). The optimal radius and length of the photoreactors for different configurations are determined. The results indicate that U-shaped and S-shaped photoreactors using UV-LEDs outperform L-shaped photoreactors in terms of disinfection effectiveness.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Green & Sustainable Science & Technology
Abdassalam A. Azamzam, Mohd Rafatullah, Esam Bashir Yahya, Mardiana Idayu Ahmad, Japareng Lalung, Sarah Alharthi, Abeer Mohammad Alosaimi, Mahmoud A. Hussein
Summary: Poor access to drinking water, sanitation, and hygiene is a major concern for humanity, with a third of the global population lacking access to safe drinking water. Solar water disinfection (SODIS) has been widely proven as an effective method for inactivating waterborne pathogens. Research is ongoing to enhance the performance of SODIS process and to discuss various water treatment methods and mechanisms for pathogen inactivation.
Article
Environmental Sciences
H. Shollenberger, G. Mathews, M. Young, S. Clark, Y. Chen
Summary: This paper presents the design and testing of a solar radiation and biosand filtration system that can provide cooking and water treatment capabilities in rural areas. The system aims to address the need for a durable, theft resistant, and efficient solar cooker for use by entire villages. However, testing in central Pennsylvania has shown limitations in water treatment efficiency due to relatively low direct normal irradiance.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
S. Belachqer-El Attar, P. Soriano-Molina, N. Pichel, A. Paris-Reche, P. Plaza-Bolanos, A. Aguera, J. A. Sanchez Perez
Summary: A novel strategy based on solar photo-Fenton mediated by ferric nitrilotriacetate combined with NaOCl has been studied for wastewater reclamation. The results showed effective inactivation of E. coli and removal of organic microcontaminants in a continuous flow system. The study also found that the liquid depth significantly influenced the removal of microcontaminants.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Multidisciplinary Sciences
Amirhossein Hassanpour, Alireza Jalali, Mehrdad Raisee, Mohammad Reza Naghavi
Summary: A novel type of multi-lamp UV photoreactors is proposed in this study, where the UV lamps are placed outside the water channel and their UV irradiation is redirected using an outer cylindrical reflector. A validated CFD model is used to investigate the impacts of various parameters on microbial inactivation. The results show that the proposed photoreactor with a fully diffuse reflector can achieve a higher log reduction value compared to the fully specular one.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Anni Juvakoski, Gaurav Singhal, Manuel A. Manzano, Miguel Angel Morinigo, Riku Vahala, Irina Levchuk
Summary: Solar disinfection (SODIS) is an affordable method for treating drinking water, and this study found that it can be effective even in colder climates. The experiments showed that in a humid continental climate, the lowest water temperature (8-11 degrees C) achieved the best disinfection results. Additionally, higher water temperatures and UV intensities increased the required disinfection doses.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Azahara Martinez-Garcia, Isabel Oller, Martin Vincent, Viviana Rubiolo, Jacent K. Asiimwe, Charles Muyanja, Kevin G. McGuigan, Pilar Fernandez-Ibanez, Maria Inmaculada Polo-Lopez
Summary: Two large reactors designed for solar water disinfection were built and tested in Spain and Uganda, showing no differences in treatment performances. The reactors successfully disinfected water under natural sunlight, meeting potable water standards. Cost analysis demonstrated the potential affordability and feasibility of the technology.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Rouhollah Farhadi
Summary: Chemical controls are common in hydroponic cultures in developing countries, but solar water disinfection shows potential for reducing the reliance on chemicals. Solar energy can eliminate fungicide consumption at acceptable costs, indicating a sustainable and clean alternative for hydroponic cultures.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Water Resources
Damiana A. Amatobi, Jonah C. Agunwamba
Summary: This study improves on the conventional SODIS design by using PET bottles, a heat absorber, and better sunrays' cover, resulting in higher inactivation rates and faster inactivation speed compared to the traditional method.
APPLIED WATER SCIENCE
(2022)
Article
Environmental Sciences
Leonardo Romero-Martinez, Ignacio Rivas-Zaballos, Javier Moreno-Andres, Ignacio Moreno-Garrido, Asuncion Acevedo-Merino, Enrique Nebot
Summary: The study found that adding hydrogen peroxide or peroxymonosulfate salt can improve the UV treatment of ballast water, reducing the UV doses required for compliance with BWMC standards.
MARINE POLLUTION BULLETIN
(2021)
Article
Green & Sustainable Science & Technology
Yijun Shi, Yunkun Qian, Jun Guo, Mengjun Mao, Dong An
Summary: A novel photoelectrochemical process (PEC/E-H2O2) was adopted to improve disinfection efficiency in distributed water treatment systems using clean energy. The process consumed low energy and effectively eliminated E. coli under simulated solar conditions. The in-situ generated H2O2 enhanced the oxidation of the photoelectrochemical system and resulted in a higher inactivation rate of E. coli compared to traditional methods. The study provides a promising alternative disinfection process for drinking water treatment.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Natalia de Melo Nasser Fava, Ulisses Costa Terin, Barbara Luiza Souza Freitas, Lyda Patricia Sabogal-Paz, Pilar Fernandez-Ibanez, John Anthony Byrne
Summary: This study evaluated the efficiency of four household slow sand filter models in removing microorganisms from river water. The results showed that the continuous operation models performed better in reducing coliform and Escherichia coli bacteria. The study also detected various microorganisms in raw and pre-treated water samples, highlighting the potential of slow sand filters in reducing microbiological risks.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
Antonio Wagner Lamon, Paulo Marcos Faria Maciel, Jose Roberto Campos, Juliano Jose Corbi, Patrick Stuart Morris Dunlop, Pilar Fernandez-Ibanez, John Anthony Byrne, Lyda Patricia Sabogal-Paz
Summary: This study evaluated the operation modes, efficiency and biological performance of slow sand filters, finding no significant differences between continuous and intermittent flow models in physical-chemical and total coliform reduction parameters, but continuous flow mode performed better in terms of E. coli reduction. The findings suggest that the efficiency of the filters is related to biofilm growth, dissolved oxygen depletion and turbidity removal.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
Isaac Sanchez-Montes, Irene Salmeron, Jose M. Aquino, Maria Inmaculada Polo-Lopez, Sixto Malato, Isabel Oller
Summary: The study evaluated the effectiveness of a solar-driven free chlorine advanced oxidation process for removing organic microcontaminants and bacteria from natural water. Results showed high removal efficiency both at laboratory and pilot-scale, making the process a promising method for water treatment.
Review
Engineering, Environmental
B. L. S. Freitas, U. C. Terin, N. M. N. Fava, P. M. F. Maciel, L. A. T. Garcia, R. C. Medeiros, M. Oliveira, P. Fernandez-Ibanez, J. A. Byrne, L. P. Sabogal-Paz
Summary: Household slow sand filters (HSSF) are effective and promising point-of-use water treatment methods, with improvements made to enhance performance and user acceptability. Various HSSF models are now available, including alternatives designs and constant operation ones, in addition to the patented ones.
Article
Environmental Sciences
Helen Lubarsky, Natalia de Melo Nasser Fava, Barbara Luiza Souza Freitas, Ulisses Costa Terin, Milina Oliveira, Atonio Wagner Lamon, Natalia Pichel, John Anthony Byrne, Lyda Patricia Sabogal-Paz, Pilar Fernandez-Ibanez
Summary: This paper investigates the correlation between the composition of extracellular polymeric substances, biomass, dissolved oxygen, and microbial community in household slow sand filters (HSSF) and their efficiency in removing particles and microorganisms from water. The study found that an increase in carbohydrates, proteins, and microbial diversity over time improved the HSSFs' efficiency.
Article
Chemistry, Physical
Dennis Deemter, Fabricio Eduardo Bortot Coelho, Isabel Oller, Sixto Malato, Ana M. Amat
Summary: This study assessed the combination of a photocatalytic membrane and solar photo-Fenton treatment for the filtration and treatment of urban wastewater. The results showed that the photocatalytic membrane significantly reduces turbidity and improves degradation efficiency.
Article
Chemistry, Physical
S. McMichael, A. Tolosana-Moranchel, M. A. L. R. M. Cortes, J. W. J. Hamilton, P. Fernandez-Ibanez, J. A. Byrne
Summary: Research in photoelectrocatalysis (PEC) has mainly focused on improving the photoanode, but this study highlights the importance of cathodic reactions in PEC disinfection. A TiO2 nanotube array was used as the photoanode paired with different cathode electrode materials. The results showed that the non-modified gas diffusion electrode (GDE) had the highest E.coli inactivation rate, which was attributed to its highest Faradaic efficiency in H2O2 formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
A. Tolosana-Moranchel, S. McMichael, J. W. J. Hamilton, J. A. Byrne, P. Fernandez-Ibanez
Summary: This study assessed the performance of a photoelectrochemical cell in degrading a mixture of emerging contaminants in distilled water and simulated wastewater effluents. The combination of WO3-GDE showed the most efficient degradation of the contaminants. Significant degradation was observed under visible light, and reasonable degradation rate constants were obtained for different compounds. Photogenerated holes were identified as the main factor responsible for the degradation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Mads Koustrup Jorgensen, Dennis Deemter, Lars Wagner Staede, Luna Gade Sorensen, Laerke Norgaard Madsen, Isabel Oller, Sixto Malato, Thorbjorn Terndrup Nielsen, Vittorio Boffa
Summary: This paper proposes a solution to enhance the retention of micropollutants in nanofiltration by adding cyclodextrins (CDs) for complexation. The results show that the addition of CDs significantly improves the rejection rates of ibuprofen, bisphenol A, and phenol compared to filtration without CDs. Furthermore, the complexation of CDs allows for filtration with ultrafiltration (UF) membranes, reducing operational expenses.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Thermodynamics
A. Ruiz-Aguirre, J. G. Villachica-Llamosas, M. Polo-Lopez, A. Cabrera-Reina, G. Colon, J. Peral, S. Malato
Summary: The study successfully explored the pilot-scale combination of H-2 generation with simultaneous water disinfection or decontamination using a TiO2-CuO mixture. By optimizing treatment conditions, the research achieved a significant reduction in the concentration of waterborne pathogens through a synergistic effect of anoxic conditions, TiO2:CuO, and solar radiation.
Article
Engineering, Environmental
Alejandro Cabrera-Reina, Marina Aliste, Maria Inmaculada Polo-Lopez, Sixto Malato, Isabel Oller
Summary: This study focuses on understanding the interactions between a complex water matrix and the process of removing a mixture of microcontaminants (acetamiprid, carbamazepine, and caffeine) using the solar/Fe3+-EDDS/persulfate process. The effects of sulfates, nitrates, bicarbonates, and chlorides on the process were assessed in different synthetic and actual water samples. The results showed that bicarbonates and chlorides have a significant impact on the efficiency of microcontaminant removal in complex water matrices, while dissolved organic matter had a negative effect on removal efficiency depending on its concentration and composition.
Article
Green & Sustainable Science & Technology
Adriana Rioja-Cabanillas, Stuart McMichael, Alvaro Tolosana-Moranchel, Salem Alkharabsheh, Nathan Skillen, Pilar Fernandez-Ibanez, John Anthony Byrne
Summary: In the past decades, human activities have led to increased pollution and energy demand. Photoelectrochemical systems, specifically tungsten oxide (WO3), have been investigated for the decentralized management of domestic wastewater and the generation of hydrogen. This study presents a thorough investigation of WO3 photoanodes for the oxidation of urea and hydrogen production, providing insights into the reaction mechanism, nitrogen balance investigation, and performance comparison to titanium dioxide (TiO2). WO3 showed significantly higher photocurrent and urea oxidation rate constant compared to TiO2, with promising applications in the photoelectrochemical production of hydrogen coupled with wastewater treatment.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Gulnara Maniakova, Maria Inmaculada Polo Lopez, Isabel Oller, Sixto Malato, Luigi Rizzo
Summary: Solar driven advanced oxidation processes (S-AOPs) have been successfully studied as tertiary and quaternary treatment of urban wastewater. However, their application has been hindered by the lack of comparison data with consolidated technologies and evaluation of environmental impact. This study compared the environmental impact of a new S-AOP called sequential treatment (ST) with sunlight/H2O2 and solar photo-Fenton (SPF) to pilot scale ozonation (O-3) treatment through Life Cycle Assessment (LCA). The results showed that ST had a better overall environmental performance compared to O-3, making it a more sustainable solution for small urban wastewater treatment plants.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
N. Pichel, F. Hymno de Souza, L. P. Sabogal-Paz, P. K. Shah, N. Adhikari, S. Pandey, B. M. Shrestha, S. Gaihre, D. A. Pineda-Marulanda, M. Hincapie, K. Luwe, S. Kumwenda, J. C. Aguilar-Conde, M. A. L. R. M. Cortes, J. W. J. Hamilton, J. A. Byrne, P. Fernandez-Ibanez
Summary: This study emphasizes the need for a global approach to monitoring drinking water and identifies several critical issues. The currently available commercial field-testing solutions do not meet the standards set by the UNICEF, with the main limitation being the requirement of a power source and long incubation time. Traditional methods are the only legally authorized ones in the case study locations, but they have limitations due to limited resources and technologies. Further research and validation are needed to develop low-cost field-testing solutions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Nishi Mehak, Bindu Rani, Aadil Fayaz Wani, Shakeel Ahmad Khandy, Ajay Singh Verma, Atif Mossad Ali, M. A. Sayed, Shobhna Dhiman, Kulwinder Kaur
Summary: In this study, the electronic, structural, and thermoelectric properties of newly designed layered rare-earth metal germanide halides were investigated. The materials showed promising thermoelectric performance, making them suitable candidates for energy harvesting in thermoelectric applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Devidas I. Halge, Vijaykiran N. Narwade, Nabeel M. S. Kaawash, Pooja M. Khanzode, Sohel J. Shaikh, Jagdish W. Dadge, Prashant S. Alegaonkar, Rajeshkumar S. Hyam, Kashinath A. Bogle
Summary: This study presents the design and fabrication of a high-performance blue light photodetector using an n-type cadmium sulfide (CdS) thin film and a p-type polyaniline (PANI). The photodetector demonstrates exceptional performance characteristics, including high responsivity, detectivity, and sensitivity, along with rapid response time and rectification behavior. The research represents a significant advancement in the field of high-performance photodetectors.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Da Hu, Jiabin Lu, Qiusheng Yan, Yingrong Luo, Ziyuan Luo
Summary: This study introduces a chemical mechanical polishing technique based on metal electrochemical corrosion for single-crystal SiC to address the environmental pollution caused by the polishing solution in chemical mechanical polishing. Wear experiments were conducted to investigate the wear properties of SiC C-surface under different grinding ball materials and solutions. The proposed mechanism of material removal in single-crystal SiC via metal electrochemical corrosion was discussed.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Lifang Mei, Long Lin, Dongbing Yan, Yu Liang, Yu Wu, Shuixuan Chen
Summary: This paper investigates the removal of CuO particles from silicon wafer surfaces using a picosecond laser. Numerical calculations and experimental research were conducted, and a thermal-stress coupled finite element model was established. The results show that as the laser energy density increases, the removal rate of CuO particles initially increases and then decreases, while the roughness of the silicon substrate decreases and then increases.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Michihiro Yamada, Shuhei Kusumoto, Atsuya Yamada, Kentarou Sawano, Kohei Hamaya
Summary: In this study, we demonstrated the low-temperature growth of a Ge layer on a Co-based Heusler alloy via Sn doping, which improved the magnetic properties and spin signal.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Xiang-Long Wei, Bao-Feng Shan, Zong-Yan Zhao
Summary: This study synthesized and characterized a CuAlO2/CuGaO2 heterostructure and evaluated its photocatalytic performance. The heterostructure exhibited superior performance compared to individual CuAlO2 and CuGaO2 photocatalysts, with increased carrier concentration, enhanced redox capabilities, superior electrochemical stability, and reduced interfacial resistance. Photocatalytic experiments demonstrated the remarkable oxidation potential and notable reduction activity of the heterostructure, outperforming CuAlO2 and CuGaO2 in degradation rates and hydrogen production rates, respectively. These findings highlight the superior performance and broad applicability of the CuAlO2/CuGaO2 heterostructure in various photocatalytic reactions.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Micka Bah, Daniel Alquier, Marie Lesecq, Nicolas Defrance, Damien Valente, Thi Huong Ngo, Eric Frayssinet, Marc Portail, Jean-Claude De Jaeger, Yvon Cordier
Summary: This study investigates the AlN nucleation layer issue in GaN high frequency telecommunication and power switching systems fabricated after heteroepitaxy on Silicon or Silicon Carbide. It is shown that using 3C-SiC as an intermediate layer can significantly decrease RF propagation losses. Measurements and analyses demonstrate that dopant diffusion into the 3C-SiC pseudo-substrate is confined beneath the interface, and a slightly conductive zone is present beneath the AlN/3C-SiC interface, explaining the low propagation losses obtained for the devices. This work highlights the importance and efficiency of the 3C-SiC intermediate layer as a pseudo-substrate.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Shuang Wang, Lijun Wu, Zhiqing Wang, Ziyue Qian
Summary: The geometric structure and electrical properties of zigzag and armchair DWSiNT perfect tubes with different Stone-Wales defects were simulated using the SCC-DFTB method. It was found that the atomic arrangement, stability, energy gap, and charge distribution strongly depend on the type of tube. The effects of strong and weak electric fields on the tubes were also investigated, showing different impact on stability and energy gap. These findings have implications for future experimental studies.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Nanda Kumar Reddy Nallabala, Sunil Singh Kushvaha, Sambasivam Sangaraju, Venkata Krishnaiah Kummara
Summary: This study focuses on the preparation and performance of MIS-type high-k dielectric oxide-based UV photodetectors. The researchers found that the Au/Ta2O5/GaN devices prepared on Ta2O5/GaN heterojunction with post-annealing exhibited improved photoresponsivity, EQE, and rise/fall times. This improvement is attributed to the optimized band configuration of the Ta2O5/GaN heterostructure and the effect of post-annealing on photogenerated charge carriers.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Jean-Francois Michaud, Marc Portail, Daniel Alquier, Dominique Certon, Isabelle Dufour
Summary: This paper reviews the use of MEMS devices without sensitive layers in gas detection applications. These devices can measure a physical property of the gas to determine its concentration, and have the advantages of generality and high detection limits.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Kanyu Yang, Chaojie Shi, Ruizhao Tian, Haoyue Deng, Jie He, Yangyang Qi, Zhengchun Yang, Jinshi Zhao, Zhen Fan, Jun Liu
Summary: This study investigates the electrical and synaptic properties of Ag/TiO2 nanorod/FTO-based RRAM devices, focusing on the impact of different seed layer thicknesses on nanorod thickness and RRAM performance. The devices show remarkable achievements in terms of endurance, self-compliance, and resistance switching ratio. The switching mechanism is attributed to space-charge-limited conduction resulting from electron trapping in oxygen vacancy traps. The devices also maintain stable synaptic properties even after undergoing multiple cycles of long-term potentiation and depression.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Karthickraj Muthuramalingam, Wei-Chih Wang
Summary: This study presents a non-destructive approach using terahertz time-domain spectroscopy (THz-TDS) to estimate the electrical properties of semi-insulating compound semiconductors. The study successfully measures the resistivity and carrier concentration of semi-insulating Silicon Carbide (SiC) and Indium Phosphide (InP) wafers using THz-TDS in transmission mode. The simplified Drude model and the Nelder-Mead algorithm are employed to estimate the electrical properties, and the results are in accordance with the manufacturer specifications. The feasibility of non-destructive mapping of the electrical properties is demonstrated, offering a promising tomographic inspection approach for online monitoring.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Pengfei Wei, Rui Tong, Xiaofeng Liu, Yao Wei, Yongan Zhang, Xu Liu, Jian Dai, Haipeng Yin, Dongming Liu
Summary: This study investigates the influence of SiNx and SiOxNy as rear-side passivation films on the performance of PERC+ cells. SiNx film is found to have better passivation performance and resistance to aluminum paste erosion, while SiOxNy film exhibits better optical performance. By designing multi-layer SiNx/SiOxNy/SiNx stacks, the cells' efficiency and bifaciality are significantly improved.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Shuangting Ruan, Xiaolan Li, Wen Cui, Zhihui Zhang, Zhihui Xu, Huanqi Cao, Shougen Yin, Shishuai Sun
Summary: Integrating photosensitive electrode materials can effectively improve the low temperature tolerance and enhance energy density and power density. The surface morphology reconstruction technique can increase the active surface area and improve electrolyte contact, leading to higher specific capacity. Additionally, the electrodes demonstrate excellent photoelectric and photothermal conversion abilities, allowing the supercapacitor to maintain high energy density even at low temperatures.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Review
Engineering, Electrical & Electronic
Ashmalina Rahman, James Robert Jennings, Mohammad Mansoob Khan
Summary: This review provides a comprehensive overview of the synthesis and applications of nanostructured CuInS2 in photocatalytic applications. Various strategies, including the introduction of dopants, surface decoration, and heterojunction formation, have been summarized to improve the photocatalytic performance of CuInS2. However, scientific challenges such as the high carrier recombination rate limit the broad application of CuInS2.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
