Article
Chemistry, Physical
Yangyang Li, Zhiqiang Rao, Zhisong Liu, Junming Zeng, Wentao Bao, Zijun Wang, Jiangbing Li, Feng Yu, Bin Dai, Ying Zhou
Summary: In this study, Ni catalysts supported by TiO2 nanoparticles were fabricated and showed significantly improved methane conversion of CO and CO2 at low temperatures under light irradiation. The photoinduced charge carriers on the surfaces of the Ni/TiO2 nanoparticles enhanced the formation of intermediate species in the methanation process, as well as the formation of CO2 delta- species conducive to CO2 activation in the CO2 methanation process.
Article
Materials Science, Multidisciplinary
Olim Ruzimuradov, Khusniddin Musaev, Shavkat Mamatkulov, Khakimjan Butanov, Isabel Gonzalo-Juan, Liudmila Khoroshko, Nurmuhammad Turapov, Suvonkul Nurmanov, Jamoliddin Razzokov, Victor Borisenko, Ralf Riedel
Summary: Nickel and chromium metal ions have been used to extend the light absorption range of titanium dioxide nanocrystals by doping and co-doping them. Various analysis techniques were employed to study the modified materials, revealing that the modified catalyst primarily contains the anatase polymorph. The incorporation of transition metal ions in the TiO2 nanocrystals resulted in a decrease in the band gap width and a decrease in photoluminescence intensity.
Article
Multidisciplinary Sciences
Dahvyd Wing, Guy Ohad, Jonah B. Haber, Marina R. Filip, Stephen E. Gant, Jeffrey B. Neaton, Leeor Kronik
Summary: This study presents a simple and inexpensive method to accurately predict fundamental band gaps of crystalline solid-state systems. The method, based on nonempirical optimal tuning of a screened range-separated hybrid functional, has been benchmarked against experiment and found to yield quantitative accuracy across a range of systems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Materials Science, Ceramics
Yan Zhao, Qianqian Xu, Xuefan Zhou, Mingyang Yan, Hanyu Gong, Xi Yuan, Hang Luo, Kechao Zhou, Dou Zhang, Chris Bowen, Yan Zhang
Summary: This paper presents a comprehensive evaluation of the photo-piezo-catalytic properties of lead-free Ba0.85Ca0.15Zr0.1(Ti1-xCox)0.9(BCZT-xCo,x = 0-0.025) ferroelectric ceramics prepared through a solid-state process. By controlling the level of Co doping, the band gap was reduced to 2.40 eV at x = 0.02, leading to increased generation of photo-generated charges and enhanced photocatalytic activity. The combination of ultrasound and illumination on a solution containing BCZT-0.02Co particles resulted in a 99% degradation of Rhodamine B within 60 minutes, surpassing the degradation achieved by illumination or ultrasound alone. The study provides new insights into the catalytic mechanism and highlights the potential of Co substitution in these lead-free ferroelectric ceramics for photo-piezo-catalysis applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
S. Muthukrishnan, R. Vidya, Anja Olafsen Sjastad
Summary: Pure anatase TiO2 only has photocatalytic activity in the UV region of solar energy. External impurities can be added to reduce the band gap of TiO2 and enhance its absorption of the visible spectrum. This study investigated the effect of Sc and V mono-doping and co-doping on the electronic structure of pure anatase TiO2 using Density Functional Theory (DFT).
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mohd Shkir, Jabir Hakami, Md Milon Hossain, Nasser S. Awwad, Aslam Khan
Summary: In this study, ZnO and Ce doped ZnO thin films were fabricated by spray pyrolysis technique, and their UV photodetection properties were investigated. The results reveal that the ZnO:Ce sample shows excellent UV photodetection performance under the irradiation of a 365 nm laser.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Lingling Wu, Cuiping Guo, Ruohan Feng, Haoyue Zhang, Nan Shi, Yao Li, Huilan Su, Xinjiang Cui, Fang Song
Summary: This study successfully enhanced the visible light absorption and solar photocatalytic efficiency of TiO2 by codoping phosphonis(V) and Titanium(III) into leaf-architectured TiO2 via a sol-gel biotemplating approach. The codoping strategy led to a 2.6 times higher solar photocatalytic degradation rate compared to commercial TiO2 P25.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Fares Almomani, Khaled L. Al-Jaml, Rahul R. Bhosale
Summary: Cobalt co-doped TiO2 photocatalysts were synthesized for solar photocatalytic production of hydrogen. The addition of cobalt improved the photocatalytic properties of TiO2 and increased hydrogen production. The photocatalysts showed promising energy efficiency in different wastewater sources.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Louis Oppong-Antwi, Bosi Huang, Judy N. Hart
Summary: CuS is a unique semiconductor with potential in optoelectronics. Doping with various elements can optimize its properties, including band gap and conductivity behavior. Doping can also alter the plasmonic properties, electron mobility, and charge separation. The use of dopants such as Ni, Zn, Mg, Fe, and Ca can effectively tune the properties of CuS for different applications.
Article
Chemistry, Inorganic & Nuclear
Zohra Nazir Kayani, Ammara Iqbal, Zainab Bashir, Saira Riaz, Shahzad Naseem
Summary: Researchers are increasingly interested in thin film materials due to the growing demand in the electronics industry. In this study, K-doped TiO2 thin films were synthesized using sol-gel dip-coating, and the effects of K concentration on the properties of the films were investigated. The results showed that K doping had a significant impact on the morphological, structural, magnetic, dielectric, antibacterial, and optical characteristics of the TiO2 films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Coatings & Films
Jinlong Pan, Yanwei Wen, Lili Wang, Zhiyong Wu, Hui Dong, Zuoyan Ye
Summary: Plasma electrolytic oxidation (PEO) can be used to create black ceramic films on aluminum alloy by incorporating transition metal anions into the electrolyte. The research focused on modifying the bandgap of alumina, revealing that doping transition metals into alumina narrowed the bandgap, resulting in the absorption of all visible light and the appearance of black color.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Physics, Condensed Matter
T. E. Ada, K. N. Nigussa, L. D. Deja
Summary: This study investigates the structural and optical properties of doping of bismuth-ferrite using density functional theory. Different geometric structures are obtained by doping with selected Alkali and Alkaline-earth metals. The electronic band gaps of the structures are calculated, and they appear to have an influence on the optical properties. The dopings result in a change in the refractive, reflective, and absorbance properties of the perovskite, with Li-Ba co-doping showing enhanced absorption capacity and multiferroic property.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
Cuiyuan Chai, Hong Liu, Weiwei Yu
Summary: The study shows that strain can achieve tunable band structures and optical properties of Fe, Co, Ni and Cu doped ZnO monolayer, such as indirect-direct band gap transition, shrink and enlargement of band gaps. This indicates a possible new route for tailoring the electronic properties of ultrathin nanofilms through strain engineering.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Muhammad Aadil, Sonia Zulfiqar, Muhammad Farooq Warsi, Philips O. Agboola, Imran Shakir, Muhammad Shahid, Najeeb Fuad Al-Khalli
Summary: In this study, mesoporous and macroporous nanosheets of Ag.Co3O4 were successfully synthesized with high catalytic activity for efficient removal of toxic dyes under natural sunlight. The exceptional activity of Ag.Co3O4 sample is attributed to its novel bimodal porous structure, high surface area, narrow bandgap, good electrical conductivity, and low charge transfer resistance, showing great potential for eliminating harmful dyes from industrial effluents.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Condensed Matter
Satyendra Singh Chauhan, Premlata Narwariya, A. K. Shrivasatava, Pankaj Srivastava
Summary: The theoretical ab-initio calculation shows that nitrogen substitution is the most stable configuration in Boron and Nitrogen doped zigzag silicon carbide nanoribbons. Boron and nitrogen atoms energetically prefer to be localized at the edges of the nanoribbons. Doping with boron and nitrogen impurity atoms transforms narrow band gap semiconductors into metallic systems at most doping sites.
SOLID STATE COMMUNICATIONS
(2021)
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)