Review
Crystallography
Guo Li, Mingsheng Xu, Dongyang Zou, Yingxin Cui, Yu Zhong, Peng Cui, Kuan Yew Cheong, Jinbao Xia, Hongkun Nie, Shuqiang Li, Handoko Linewih, Baitao Zhang, Xiangang Xu, Jisheng Han
Summary: This paper reviews the research on laser annealing for the ohmic contact process of SiC power devices. It covers the laser process mechanism, ohmic contact electrode materials, and substrate materials. The effect of laser parameters on ohmic contact and the annealing process on SiC diode devices is also discussed. Additionally, the progress of using laser annealed ohmic contacts on other substrate materials such as 6H-SiC and semi-insulating 4H-SiC-based devices is briefly mentioned.
Article
Chemistry, Multidisciplinary
Naiji Yang, Bo Song, Wenjun Wang, Hui Li
Summary: The temperature field in a growth chamber controlled by double induction coils for SiC single crystal growth was simulated. The results showed that the double induction coils reduced the thermal stress in the grown SiC ingot, enhanced the growth rate, increased the utilization of SiC powders, and improved the temperature field. Therefore, double induction coils are a good choice for the growth of large-sized SiC single crystals, especially 8 inch SiC single crystals. The best configuration tested had a 4:6 turn ratio between the upper and lower coils.
Article
Chemistry, Analytical
Yongwei Li, Ting Liang, Cheng Lei, Qiang Li, Zhiqiang Li, Abdul Ghaffar, Jijun Xiong
Summary: This study presents a preparation method for a high-temperature pressure sensor based on the piezoresistive effect of p-type SiC. The sensor showed stable electrical connection in air environments up to 600 degrees C, and achieved an output sensitivity of approximately 1.09 mV/V/bar, better than other SiC pressure sensors. This research is significant for testing mechanical parameters under extreme temperatures of 600 degrees C.
Article
Materials Science, Multidisciplinary
Chen Wu, Xudong Fang, Qiang Kang, Ziyan Fang, Hao Sun, Dong Zhang, Libo Zhao, Bian Tian, Ryutaro Maeda, Zhuangde Jiang
Summary: SiC, as a third generation semiconductor, is widely used in power devices and sensors. The formation mechanism and high temperature resistance of ohmic contacts, an important component for signal output of SiC chips, have been investigated. It is found that the contact metal determines the formation of ohmic contact. The incorporation of barrier and protective layers can improve the high temperature stability of the contacts. The stable and high temperature ohmic contact can be applied in various SiC devices.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Physics, Applied
Kazuki Ohnishi, Naoki Fujimoto, Shugo Nitta, Hirotaka Watanabe, Shun Lu, Manato Deki, Yoshio Honda, Hiroshi Amano
Summary: This study demonstrates the precise control of Mg concentration in p-type GaN layers using the halide vapor phase epitaxy method. By adjusting the input partial pressure of MgCl2, the Mg concentration in GaN layers can be effectively controlled. The samples exhibit high structural qualities and the acceptor concentration is in good agreement with the concentration of Mg, suggesting that almost all Mg atoms act as acceptors.
JOURNAL OF APPLIED PHYSICS
(2022)
Review
Physics, Multidisciplinary
Huang Ling-Qin, Zhu Jing, Ma Yue, Liang Ting, Lei Cheng, Li Yong-Wei, Gu Xiao-Gang
Summary: Silicon carbide (SiC) is a promising material for high temperature, high voltage, high power, and low-power dissipation devices due to its unique properties. However, the main bottleneck hindering its practical application is the fabrication of good metal/SiC contact. Research on metal/SiC contact technology is still ongoing to address this issue.
ACTA PHYSICA SINICA
(2021)
Article
Engineering, Electrical & Electronic
Bing-Yue Tsui, Yen-Ling Chen, Shih-Hao Lai
Summary: In this study, metal contact with low specific contact resistance was developed on p-type SiC using fine-tuned TiAl deposition and annealing conditions. The nonuniform Ti-Si-C interfacial layer grown on high temperature ion implanted P+ SiC exhibited nonohmic behavior at small contact areas, which could be improved through low-energy, room-temperature ion implantation and Ar plasma treatment. The metal contact on p-type SiC achieved a record-low specific contact resistance at a small contact area through the aforementioned methods.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Energy & Fuels
Zetao Ding, Di Yan, Josua Stuckelberger, Sieu Pheng Phang, Wenhao Chen, Christian Samundsett, Jie Yang, Zhao Wang, Peiting Zheng, Xinyu Zhang, Yimao Wan, Daniel Macdonald
Summary: Phosphorus spin-on doping is proposed as an alternative doping method for high performance poly-Si passivating contacts, showing promising results in promoting efficiency of silicon solar cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Multidisciplinary
Xueqi Wang, Jianbo Tu, Wenhao Dai, Pinwen Zhu, Qiang Tao, Fulong Ning, Baochang Liu
Summary: In this study, fine-grained polycrystalline diamond compacts (PDC) doped with 0.5 wt% nano-vanadium carbide (VC) were sintered under high pressure and high temperature. The addition of VC improved the hardness, impact resistance, and wear resistance of the PDC samples. This improvement can be attributed to the occupation of cobalt space by the harder material VC, the reduction of cobalt and eta-phase Co3W3C content, and the refinement and dispersion of tungsten carbide (WC) grains.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Energy & Fuels
Malte Koehler, Manuel Pomaska, Paul Procel, Rudi Santbergen, Alexandr Zamchiy, Bart Macco, Andreas Lambertz, Weiyuan Duan, Pengfei Cao, Benjamin Klingebiel, Shenghao Li, Alexander Eberst, Martina Luysberg, Kaifu Qiu, Olindo Isabella, Friedhelm Finger, Thomas Kirchartz, Uwe Rau, Kaining Ding
Summary: Researchers have developed a passivating contact based on a double layer of nanocrystalline silicon carbide that combines high conductivity, excellent surface passivation, and high optical transparency for silicon solar cells. This contact design results in improved short-circuit current density, fill factor, and efficiency, while avoiding the need for additional hydrogenation or high-temperature post-deposition annealing steps, offering pathways towards conversion efficiencies of 26%.
Article
Optics
Iryna Khodasevych, Patrick Rufangura, Francesca Iacopi
Summary: In this research, a closed-form expression for the polarizability of nanoparticles composed of nanolayers is derived, and the effects of different core materials and conductive shells on the absorption and scattering efficiency of nanoparticles are investigated. The results show that significant enhancement of absorption and scattering efficiency in the mid-infrared range can be achieved by combining graphene and polar dielectrics, assisted by coupling via a low permittivity spacer.
Article
Materials Science, Multidisciplinary
Yann Gallou, Marie Dubois, Alexandre Potier, Didier Chaussende
Summary: The origin of the (110) texture in polycrystalline 3C-SiC grown by chemical vapor deposition at different temperatures is investigated. The results show that there is a high symmetrical order in-plane for the (110) orientation, which forms via twin-mediated growth involving the formation of twin plane reentrant edges. The transition to the (110) orientation occurs when the temperature increases and the partial pressure of reactive species decreases, promoting surface diffusion to the twin plane reentrant edges.
Article
Chemistry, Physical
Yanfang Tao, Sujuan Zhang, Gaoli Chen, Zhongliao Wang, Xiuzhen Zheng, Sugang Meng, Shifu Chen
Summary: Photocatalytic selective organic transformations (SOTs) with H-2 production in one reaction system have great potential for sustainable organic synthesis and clean fuel generation. In this study, a new La-ion engineering strategy was used to fabricate Ni2P/CdLaS composite photocatalysts, which greatly improved the visible light-initiated alcohol oxidation-hydrogen production performance. The optimized 1.5% NP/CLS sample showed significantly higher H-2 and aromatic aldehyde production rates compared to other catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Ceramics
Yanghee Kim, Ji Yeong Lee, Min Kyung Cho, Jae-Pyoung Ahn, Young-Wook Kim
Summary: The electrical properties of polycrystalline ceramics are primarily influenced by the presence of grain boundaries or cores, with the electrical resistivity slowly increasing with an increase in the number of boundaries.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Deniz Turkay, Konstantin Tsoi, Ergi Donercark, Rasit Turan, Selcuk Yerci
Summary: Research on contact resistivity in multilayer structures for solar cells emphasizes the importance of minimizing resistivity for high device performance. Various spreading resistance models have been demonstrated for accurately calculating resistance measurements, with a new computationally efficient model proposed. Experimental applicability has been shown using test structures with specific material configurations.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Materials Science, Multidisciplinary
Steven DelaCruz, Zhongtao Wang, Ping Cheng, Carlo Carraro, Roya Maboudian
Article
Chemistry, Multidisciplinary
Xiang Gao, Xiaokun Pei, David W. Gardner, Christian S. Diercks, Seungkyu Lee, Bunyarat Rungtaweevoranit, Mathieu S. Prevot, Chenhui Zhu, Sirine Fakra, Roya Maboudian
ADVANCED MATERIALS
(2019)
Article
Materials Science, Ceramics
Ping Cheng, Steven DelaCruz, Dung-Sheng Tsai, Zhongtao Wang, Carlo Carraro, Roya Maboudian
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2019)
Article
Nanoscience & Nanotechnology
Yuhui Xie, Christian Schottle, Ying Li, Carlo Carraro, Xinya Zhang, Alexander Katz, Roya Maboudian
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Chemistry, Physical
Xiang Gao, Steven DelaCruz, Chenhui Zhu, Siyi Cheng, David Gardner, Yuhui Xie, Carlo Carraro, Roya Maboudian
Article
Materials Science, Ceramics
Zhongtao Wang, Steven DelaCruz, Dung-Sheng Tsai, Roya Maboudian
CERAMICS INTERNATIONAL
(2019)
Article
Chemistry, Multidisciplinary
David W. Gardner, Xiang Gao, Hossain M. Fahad, An-Ting Yang, Sam He, Ali Javey, Carlo Carraroa, Roya Maboudian
CHEMISTRY-A EUROPEAN JOURNAL
(2019)
Article
Chemistry, Analytical
Siyi Cheng, Steven DelaCruz, Chen Chen, Zirong Tang, Tielin Shi, Carlo Carraro, Roya Maboudian
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Chemistry, Analytical
Hu Long, Sally Turner, Aiming Yan, Hongmei Xu, Moonsuk Jang, Carlo Carraro, Roya Maboudian, Alex Zettl
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Chemistry, Analytical
Qizhen Zhu, Shiyu Hu, Linqun Zhang, Ying Li, Carlo Carraro, Roya Maboudian, Wei Wei, Anran Liu, Yuanjian Zhang, Songqin Liu
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Chemistry, Physical
Chuan-Pei Lee, Bayu-Tri Murti, Po-Kang Yang, Francesca Rossi, Carlo Carraro, Roya Maboudian
Summary: A cobalt oxide-decorated silicon carbide nano-tree array electrode was synthesized for micro-supercapacitor applications, showing extremely hydrophilic surface characteristics for enhanced charge transfer at the electrode/aqueous electrolyte interface. The well-standing architecture provided a directional charge transport route along the length of SiC nanowires, leading to excellent areal capacitance and stability in cyclic voltammetry measurements for 2000 cycles at a high scan rate of 150 mV s(-1).
Article
Materials Science, Multidisciplinary
David W. Gardner, Jiaqi Li, Martin Kunz, Wei-Chih Liao, Chenhui Zhu, Carlo Carraro, Paulo J. M. Monteiro, Roya Maboudian
Summary: This article investigates the intergrain and intragrain interactions of calciumsilicate-hydrates (C-S-H), nanocrystalline forms of tobermorites, which control the long-term stress response of concrete. Through experiments, it is found that layer stacking disorder significantly increases in 11 angstrom tobermorite powder. Similar results are observed in nanocrystalline C-S-H powders, where layer stacking disorder (in the form of intragrain deformation) increases with low water content and large basal spacing.
Article
Chemistry, Physical
Zhou Li, Chen Liu, Jessica Jane Frick, Adrian K. Davey, Matthew N. Dods, Carlo Carraro, Debbie G. Senesky, Roya Maboudian
Summary: This work presents the synthesis, characterization, and absorption capacity of graphene aerogel loaded with UiO-66-NH2 metal organic framework (MOF). The density-tunable MOF/GA composites were synthesized by adjusting the mass ratio of MOF to graphene oxide (GO) in the starting solution. Scanning electron microscopy (SEM) images and pore size calculations showed that MOF loading affected the macroporous structure of the GA framework but not the mesoporous structure. The MOF loading exhibited minimum density for the 10-30% samples. MOF-30%/GA demonstrated the highest absorption capacity for chloroform among all solvents tested.
Article
Chemistry, Physical
Bowen Zheng, Chen Liu, Zhou Li, Carlo Carraro, Roya Maboudian, Debbie G. Senesky, Grace X. X. Gu
Summary: Graphene aerogel (GA), a 3D carbon-based nanostructure built on 2D graphene sheets, is the lightest solid material ever synthesized. This study systematically investigates the mechanical properties and structural integrity of GA, revealing that smaller and less spherical inclusions during the preparation process are conducive to strength and stiffness but may lead to brittleness. The study also highlights the requirement of a minimum number of bonds per atom for a structurally valid GA in molecular dynamics simulations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Biomaterials
Siyi Cheng, Xiang Gao, Steven DelaCruz, Chen Chen, Zirong Tang, Tielin Shi, Carlo Carraro, Roya Maboudian
JOURNAL OF MATERIALS CHEMISTRY B
(2019)
