Article
Engineering, Electrical & Electronic
J. Perriere, M. Nistor, E. Millon, C. Cachoncinlle, C. Hebert, N. Jedrecy
Summary: This study investigates the varied electric and magneto-transport properties of epitaxial Nd-doped ZnO thin films grown on (100) MgO single crystal substrate under different growth temperatures. The structural changes are accompanied by significant modifications in charge transport mechanisms, leading to transitions from metallic behavior to semiconductor characteristics. The incorporation of Nd3+ ions during growth affects the scattering centers for electrons, influencing the overall conductivity of the films.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Magdalena Nistor, Florin Gherendi, Jacques Perriere
Summary: In this study, highly conducting and transparent Nd:ZnO thin films were successfully grown on c-cut sapphire substrates using pulsed electron beam deposition. By doping with Nd and adjusting the growth temperature, the structural quality of the films was improved, leading to low resistivity and high transparency. These films can be used as transparent conductive electrodes in solar cell devices and plasmonic applications.
Article
Materials Science, Multidisciplinary
Laya Dejam, Slawomir Kulesza, Jamshid Sabbaghzadeh, Atefeh Ghaderi, Shahram Solaymani, Stefan Talu, Miroslaw Bramowicz, Mitra Amouamouha, Amir Hossein Salehi Shayegan, Amir Hossein Sari
Summary: In this study, thin films of undoped ZnO, ZnO doped with Al, ZnO doped with Cu, and co-doped ZnO with Al and Cu were deposited on quartz substrates using RF sputtering. The samples were investigated for their advanced fractal features, crystalline structure, and optical properties. The results showed that the films had different morphologies and transmission spectra, with the co-doped sample exhibiting the highest transparency in the visible region and a desirable band gap.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Anoop Kumar Singh, Po-Wei Chen, Dong-Sing Wuu
Summary: Al-doped ZnGa2O4 films were deposited on sapphire substrates with varying DC power for the Al target, with the 20 W deposition showing the highest crystalline quality and wide-bandgap. X-ray photoemission spectra revealed the bonding of Al in the ZGO network, and the photodetector with the 20 W film exhibited significantly improved performance compared to the 0 W film.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Wei-Xiang Gao, Xue-Ting Chang, Xiao-Jie Zhu, Jun-Feng Li, Ying-Chang Jiang, Dong-Sheng Wang, Chuan-Xiao Yang, Shi-Bin Sun
Summary: Metal oxide semiconductors (MOSs) are ideal sensing materials for detecting volatile organic compounds. In this study, AZO/WO3 heterostructure films were prepared and showed excellent isopropanol-sensing performance.
Article
Nanoscience & Nanotechnology
Riya Nag, Rama Kanta Layek, Abhijit Bera
Summary: Transparent, flexible, and chemically stable conducting electrodes are crucial for optoelectronic device fabrication. This study explores metal-semiconductor (MS) junctions utilizing two-dimensional (2D) MXene nanosheets and Al-doped ZnO nanoparticles. The heterojunctions were formed by layer-by-layer self-assembly on an indium tin oxide (ITO) substrate and characterized using scanning tunneling microscopy (STM) and spectroscopy. The results demonstrate the ability to manipulate the MS junction properties, such as rectification ratio and contact resistance, by functionalizing the 2D-metal MXene and doping the ZnO nanoparticles.
ACS APPLIED NANO MATERIALS
(2022)
Article
Physics, Applied
Conglong Chen, Junxiao Yu, Zefang Lv, Fengling Zhang, Kuidong Wang, Runze Li, Jie Chen
Summary: Due to their strong nonlinear optical effects and ultrafast response properties, transparent conductive oxides are considered as promising candidate materials for next-generation THz modulation devices and other photonic applications. However, the mechanisms of photon-induced ultrafast carrier relaxations in these materials are not fully understood. In this study, the interband carrier dynamics in Al-doped ZnO, a prototype material of this family, were investigated using femtosecond optical transmittance measurements with different excitation photon energies. It was found that the interband relaxation of the photon-induced carriers is mainly through second-order recombination, which involves direct band-to-band recombination assisted by intraband electron relaxation. The high density of doped electrons provides efficient intraband relaxation channels through electron-phonon interaction and electron-impurity scattering, contributing to the overall ultrafast response, especially under indirect and band tail transitions. This study provides new insights into the ultrafast response mechanism of Al-doped ZnO and the analyzing method can be generalized to other heavily doped semiconductors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Sema Kurtaran
Summary: ZnO:Al films were produced using ultrasonic spray pyrolysis technique and annealed at different times, showing significant impact of annealing time on optical, structural, electrical and surface properties. This study highlights the importance of optimizing annealing time for enhanced performance of ZnO:Al films in various applications.
Article
Engineering, Mechanical
Dong Gyu Kang, Hyeon Gyun Nam, DaeHo Kim, Seung Min Han
Summary: Metal-ceramic nanolayered composites with varying ceramic layer thickness were studied to investigate their deformation behavior. It was found that stable plastic deformation occurred in samples with a 9 nm thick AZO layer, while unstable brittle fracturing was observed in samples with a 120 nm thick AZO layer.
EXTREME MECHANICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Chien-Yie Tsay, Shih-Hsun Yu
Summary: The incorporation of Al and Al-B into ZnO thin films can significantly improve the microstructural, surface morphological, electrical and optical properties, particularly enhancing optical transparency and optimizing electrical performance.
Article
Chemistry, Physical
Xi Dong, Tuan Anh Pham, Chunqiang Xu, Yining He, Wei Lai, Xianglin Ke, Pengpeng Zhang
Summary: In this study, the growth and electronic properties of SnSe2 films on the 3 x 3 reconstructed (111)-oriented SrTiO(3) surface were investigated using scanning tunneling microscopy/spectroscopy. A coverage-dependent growth mode, which is correlated with the spatial distribution of the electronic properties of SnSe2 films, was identified. It was also demonstrated that interfacial modification using a van der Waals-layered material of low work function (1T-WSe2) effectively alters the growth and electronic structures of SnSe2.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Victor V. Petrov, Irina O. Ignatieva, Maria G. Volkova, Irina A. Gulyaeva, Ilya V. Pankov, Ekaterina M. Bayan
Summary: Transparent Al-doped ZnO films were synthesized by solid-phase pyrolysis and characterized by XRD, SEM, and TEM. The films exhibit wurtzite structure and have a uniform distribution of nanoparticles. The introduction of 1% Al results in a narrowed band gap and improved response time to radiation.
Article
Energy & Fuels
C. Fadel, J. Ghanbaja, S. Migot, S. Cuynet, J. F. Pierson, F. Mucklich, D. Horwat
Summary: Aluminum-doped zinc oxide (AZO) films were synthesized using reactive high power impulse magnetron sputtering (HiPIMS) at various Al contents. Investigations on film structure, microstructure, and electrical properties revealed that increasing Al content led to the evolution of film structure and microstructure, and effective doping could be achieved up to 3 at.% Al using HiPIMS.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Materials Science, Ceramics
Jia-Horng Lin, Tao Yang, Xuefei Zhang, Bing-Chiuan Shiu, Ching-Wen Lou, Ting-Ting Li
Summary: A highly sensitive ammonia gas sensor was prepared by synthesizing Mn-doped metal oxide semiconductor nanoparticles and loading them onto a poly (dopamine) nanofiber spun yarn. The sensor showed excellent gas sensitivity, with a response up to 13.13 (Ra/Rg) in a 100 ppm ammonia atmosphere, and still up to 2.61 at a concentration as low as 10 ppm at room temperature. The flexible and strong core yarn retained its properties after the modification.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Santanu Pal, Shuvaraj Ghosh, Durga Basak
Summary: Transparent conducting films based on Al and In co-doped ZnO were successfully deposited at room temperature using pulsed laser deposition technique on glass and PET substrates. By controlling the chamber O-2 pressure, the desired structural, electrical, and optical properties of the films were achieved without the need for substrate heating.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Chi-Yang Liu, Shu-Yi Tsai, Chung-Ta Ni, Kuan-Zong Fung
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Materials Science, Ceramics
Chi-Yang Liu, Shu-Yi Tsai, Chung-Ta Ni, Kuan-Zong Fung
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2019)
Article
Engineering, Electrical & Electronic
Shu-Yi Tsai, Kuan-Zong Fung, Chao-Nan Wei, Hui-Yun Bor
JOURNAL OF ELECTRONIC MATERIALS
(2014)
Article
Physics, Applied
Chi-Yang Liu, Shu-Yi Tsai, Chung-Ta Ni, Kuan-Zong Fung, Chun-Yao Cho
JAPANESE JOURNAL OF APPLIED PHYSICS
(2019)
Article
Chemistry, Analytical
S. Divya Rani, R. Ramachandran, Sunirmal Sheet, Md Abdul Aziz, Yang Soo Lee, Abdullah G. Al-Sehemi, Mehboobali Pannipara, Yang Xia, Shu-Yi Tsai, Fong-Lee Ng, Siew-Moi Phang, G. Gnana Kumar
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Chemistry, Physical
Jaroslaw Milewski, Tomasz Wejrzanowski, Kuan-Zong Fung, Arkadiusz Szczsniak, Karol Cwieka, Shu-Yi Tsai, Olaf Dybinski, Jakub Skibinski, Jhih-Yu Tang, Lukasz Szablowski
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Physical
N. Priyanga, A. Sahaya Raja, Mehboobali Pannipara, Abdullah G. Al-Sehemi, Siew-Moi Phang, Yang Xia, Shu-Yi Tsai, J. Annaraj, S. Sambathkumar, G. Gnana Kumar
Summary: In this study, MnO2 nanorods coated tea bag filter paper were developed as a self-standing, bendable, and disposable electrochemical probe for sensitive and selective H2O2 detection. By addressing challenges in H2O2 sensing and utilizing core@shell architecture with MoS2, the MnS@MoS2/TBFP probe showed low detection limit, excellent sensitivity, and wide linear range for H2O2 detection. The non-enzymatic H2O2 detection performances of MnS/MoS2/TBFP were found to be selective, decisive, repeatable, and stable, making them promising for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Coatings & Films
Fu Jun Wei, Bang Yen chou, Kuan Zhong Fung, Shu Yi Tsai
Summary: This study investigates the plastic strain distribution of cold spray Cu powders and coatings using electron backscatter diffraction (EBSD) analysis. It is found that more dynamic recrystallization and plastic strain release occur in the as-sprayed EP and GA coatings compared to the WA coating. The influence of recrystallization of twin grains in the GA coating on the ductility of the coating is discussed. The static recrystallization in the postannealing treatment is more prominent in the EP and GA coatings, supporting differences in dynamic recrystallization among the cold-sprayed coatings determined through EBSD analysis. The thermal conductivity of cold-sprayed Cu coatings is affected by recrystallization and strain release.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Gabriela Komorowska, Tomasz Wejrzanowski, Jan Jamroz, Agnieszka Jastrzebska, Wojciech Wrobel, Shu-Yi Tsai, Kuan-Zong Fung
Summary: The cathode design for high-temperature fuel cells needs to consider functional properties such as oxygen catalytic reduction, oxygen ion transport, electrical conductivity, and gas transport, as well as mechanical stability. This research optimized the manufacturing process of composite cathodes and successfully fabricated them using tape casting and firing techniques.
Article
Materials Science, Multidisciplinary
Fu-Jun Wei, Bang-Yen Chou, Kuan-Zong Fung, Shu-Yi Tsai, Chung-Wei Yang
Summary: When cold spraying is performed at a velocity equivalent to or greater than a material-dependent critical velocity, powders undergo plastic deformation and localized heating, leading to metallurgical bonding and/or mechanical interlocking. This study examined the characteristics of Cu feedstocks and their influence on the bonding strength of cold-sprayed Cu coatings. The results showed that annealing released plastic microstrains in Cu powders, and feedstock properties affected the resulting coating's ductility and hardness.
Article
Biochemistry & Molecular Biology
Shu-Yi Tsai, Kuan-Zong Fung
Summary: Co-free layered LiNi0.5Mn0.5O2 has high theoretical capacity and low cost compared to LiCoO2. The preparation method and condition greatly influence the electrochemical performance of LiNi0.5Mn0.5O2. Sol-gel synthesis provides samples with a pure phase and better electrochemical behavior compared to solid-state reaction.
Article
Chemistry, Inorganic & Nuclear
Ricardo Jimenez, Isabel Sobrados, Sandra Martinez-Chaparro, Angel Adolfo del Campo, M. Lourdes Calzada, Jesus Sanz, Shu Yi Tsai, Ming Rui Lin, Kuan Zong Fung, Edvardas Kazakevicius, Algimantas Kezionis
Proceedings Paper
Electrochemistry
K. Z. Fung, C. T. Ni, S. Y. Tsai, J. Y. Tang
SOLID OXIDE FUEL CELLS 15 (SOFC-XV)
(2017)
Article
Materials Science, Ceramics
S. Y. Tsai, C. T. Ni, K. Z. Fung
CERAMICS INTERNATIONAL
(2017)
Proceedings Paper
Electrochemistry
Kuan-Zong Fung, Shu-Yi Tsai, Chi-Yang Liu
SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)
(2013)
Article
Physics, Condensed Matter
Shivani Gohri, Jaya Madan, Rahul Pandey
Summary: This study improves the efficiency of SnS-based solar cells by implementing the glancing angle deposition approach and introducing a CZTSSe layer. The findings offer valuable insights for enhancing the design of SnS-based solar cells and making them more efficient.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Mahboubeh Yeganeh, Davoud Vahedi Fakhrabad
Summary: The lattice thermal conductivity of CdO monolayer was investigated, and it was found to be lower than that of bulk CdO due to the lower phonon lifetime and phonon group velocity. As a result, the monolayer exhibits higher thermoelectric efficiency compared to the bulk counterpart.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Shivam Srivastava, Prachi Singh, Anjani K. Pandey, Chandra K. Dixit
Summary: In this research paper, a novel equation of state (EOS) based on finite strain theories is proposed for predicting the thermo elastic properties of various materials. Extensive analysis and comparison with existing models and experimental data demonstrate the validity and effectiveness of the proposed EOS in capturing the unique thermodynamic behavior of nanomaterials, bulk metallic glasses, and superconductors. This research is of great importance in the fields of materials science, nanotechnology, and condensed matter physics.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Subrata Das, Sanjoy Kr Mahatha, Konstantin Glazyrin, R. Ganesan, Suja Elizabeth, Tirthankar Chakraborty
Summary: In this study, we investigated the structural evolution of Tb2Ti2O7 under external pressure and temperature, and confirmed the occurrence of an isostructural phase transition beyond 10 GPa pressure. This transition leads to changes in lattice parameters and mechanical properties, which can be understood in terms of localized rearrangement of atoms.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Hamze Mousavi
Summary: It has been found that undoped graphene sheet has zero states at the Fermi energy level, making it difficult for Cooper pairing to occur in the superconductive state. However, T-graphene, with physical properties similar to graphene, exhibits metallic behavior and has available electron states near the Fermi level. The gap equation for the s-wave superconductive state is derived based on the attractive Hubbard model and the Bogoliubov de Gennes equation for this two-dimensional metallic system. It is found that a nonzero critical temperature, τ, exists for different levels of electron-electron interaction, ǫ. τ has higher values when the system has electronic half band-filling, but decreases when the system does not have half band-filling. However, τ vanishes when ǫ becomes small enough near the band edges.
SOLID STATE COMMUNICATIONS
(2024)
