Article
Crystallography
Denis N. Karimov, Irina I. Buchinskaya, Anna G. Ivanova, Natalia A. Arkharova, Marina P. Zykova, Boris Nabatov, Ivan S. Volchkov, Kirill Khaydukov, Nikolay Sorokin
Summary: Transparent-yellow YbF2+x single microcrystals were successfully synthesized by vapor-based reaction and their surface morphology and characteristic void structures were investigated.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Materials Science, Ceramics
Kanyapak Silakaew, Ekaphan Swatsitang, Prasit Thongbai
Summary: The dielectric properties of a novel polymer dielectric material were investigated by incorporating conductive RuO2 and high-permittivity nBT into PVDF. The interfacial polarization between RuO2-nBT and RuO2-PVDF interfaces played a critical role in improving the dielectric properties of the composites.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Tsang-Tse Fang, Yu-Chi Lu, Hsing- Hsiang
Summary: In this study, the calculation of space charge potential, the difference of the activation energy of grain boundary and grain, and the ratio of conductivity of grain boundary and grain at different temperatures of polycrystalline ceramics were reevaluated. The model takes into account charge carriers hopping through bulk and grain boundary barriers with different mobility. It was found that the present model is more accurate and precise than previous models, indicating that the assumption of the same mobility of charge carriers hopping through bulk and grain boundary barriers made in previous studies is unsuitable.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Katy S. Gerace, Michael T. Lanagan, John C. Mauro
Summary: Understanding the mechanisms contributing to dielectric properties of glasses is critical for designing new compositions for microwave frequency applications. In this work, dielectric permittivity was measured for a series of niobiosilicate glasses with varying compositions. The calculations of polarizability and experimental results reveal that SiO2 polarizability depends on the chemistry and connectivity of the glass, which has important implications for designing glass compositions for microwave frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Hamed A. A. Gatea, Sarah Jawad Shoja, Hamza Jasim Albazoni
Summary: Barium strontium titanate (BST) Ba1-xSrxTiO3 nanopowders were synthesized successfully via the sol-gel route. The study investigates the effects of increasing strontium ions on the structural, morphological, and optical properties of the BaSrTiO3 compound. XRD results show that the polycrystalline BST phase forms at temperatures above 700°C. The crystal structure changes from tetragonal to pseudo-cubic or cubic with the increase of Sr+2 ions.
Article
Materials Science, Ceramics
Kumar Brajesh, Sudhir Ranjan, Rishow Kumar, Rajeev Gupta, Ambesh Dixit, Ashish Garg
Summary: In this manuscript, the room-temperature properties of CuO and Cu0.995La0.005O ceramics synthesized by solid-state reaction method were investigated. La doping in CuO leads to the evolution of compact and dense microstructure with reduced porosity. The La doping induces strain in the CuO lattice resulting in a reduction in the lattice parameters and cell volume. The dielectric constant of Cu0.995La0.005O ceramics is enhanced and the leakage current is reduced, attributed to the dense microstructure and strain in CuO lattice after La doping. The bandgap of Cu0.995La0.005O ceramics decreases due to increased vacancy defect concentration, and the magnetic and dielectric properties are correlated with the grain size in La-doped CuO.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
Hauke Ingolf Kremer, Kwok Wa Leung, Mike W. K. Lee
Summary: The low-profile DRA utilizing dielectric and air vias achieves stable radiation performance and wide impedance bandwidth, manufactured entirely using PCB technology. Skillful arrangement of air vias allows control of resonant frequencies for different modes, and the prototype demonstrates a wide impedance bandwidth of 47.5% and a maximum gain of 6.84 dBi. Furthermore, a small antenna footprint and low profile are achieved, with a dual-polarized antenna showing stable radiation performance and high isolation across its passband.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Materials Science, Ceramics
Tomoki Murata, Toru Asaka, Sakyo Hirose
Summary: Dielectric tunability has been extensively studied in ferroelectric materials, with negative tunability being common and positive tunability rare. However, titanite CaTiSiO5 demonstrates both positive and negative tunability, suggesting unique behavior in high electric fields compared to conventional antiferroelectrics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Editorial Material
Agricultural Engineering
Jialu Qi, Zhihe Yang, Yangtao Ou, Feng Jiang, Zhongkai Wang, Yaqiong Zhang
Summary: This study successfully prepared high-toughness polylactide (PLA)-based materials by blending different components. The addition of poly (D-lactide) (PDLA) changed the structure of ethylene-acrylic ester-glycidyl methacrylate random terpolymer (EGMA) phase and formed stereocomplex (SC) crystallites at the interface. Compared to pristine PLLA, the ternary blend showed high impact strength and elongation at break. The material also exhibited fast shrinking property in hot water without changing mechanical properties after multiple stretching-shrinking cycles. These findings are of great importance in the development of high-performance PLA-based materials in medical and packaging fields.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Materials Science, Ceramics
Jie Fu
Summary: PNb9O25 ceramic was prepared using the sparking plasma sintering (SPS) method. The ceramic exhibited high dielectric constant, low dielectric loss, and high electrical conductivity, showing stable performance within a certain temperature range.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Maya Verma, Amit Tanwar, Divya Haridas, Sandeep Mahajan, Rashmi Menon, Sudhanshu Kumar, K. Sreenivas
Summary: This study investigates the influence of calcination temperature on the structural, dielectric, piezoelectric, and ferroelectric properties of strontium bismuth niobate ceramics. It is found that the sample calcined at 1000 degrees C exhibits the best performance with maximum orthorhombic distortion, minimum phase transition losses, and highest values of piezoelectric charge constant and remnant polarization. The results indicate that calcination temperature has a significant impact on the properties of the ceramics.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
S. A. N. Franca Junior, W. Acchar, S. L. A. Dantas, P. H. Chiberio, H. P. A. Alves, M. R. D. Bomio, F. V. Motta, F. Bohn, A. Ferreira, F. Vaz, M. A. Correa
Summary: We conducted a comprehensive investigation on the high-frequency dielectric properties of (ZrO2)100-x(BaTiO3)x heterostructures. By adjusting the content of BaTiO3, we could modify the dielectric constant of the resulting ceramic sheets. Our results demonstrated successful fabrication of heterostructured ceramic sheets and the ability to tailor the electric, structural, and dielectric properties of both ZrO2 and BaTiO3 materials. Furthermore, the evolution of the dielectric constant could be manipulated according to specific technological applications.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
X. Wen, G. Yang, Q. Ma, Y. Tian, X. Liu, D. Xue, Q. Deng, S. Shen
Summary: In this study, compositional gradients were introduced into Ba1-xSrxTiO3 systems to enhance the temperature stability of flexoelectric behavior. The improved stability in graded ceramics results from the engineered sequential Curie temperatures of individual layers and the positive correlation between dielectric constant and flexoelectricity, significantly reducing the drastic variations of flexoelectricity at different temperatures.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Zun-Peng Feng, Ya-Nan Hao, Jing Qin, Shao-Long Zhong, Ke Bi, Yu Zhao, Li-Juan Yin, Jia-Yao Pei, Zhi-Min Dang
Summary: Large deformability and high sensitivity are achieved simultaneously in a high-performance soft stretchable sensor by incorporating ultrasmall barium titanate nanoparticles (BT NPs) with high permittivity and highly active surfaces and a high-stretchability p(BA-GMA) elastomer matrix. The sensor exhibits high capacitance and sensitivity due to the increased permittivity and capacitance of the composite dielectric material. The BT/p(BA-GMA)-based sensor has excellent stability and reliability, making it suitable for dynamic monitoring applications.
Review
Chemistry, Multidisciplinary
Fan Wu, Aming Xie, Lai Jiang, Soumya Mukherjee, Han Gao, Jiaoyan Shi, Jiale Wu, Hongcheng Shang, Zhengxiao Sheng, Ronghui Guo, Lipeng Wu, Jun Liu, Matthew E. Suss, Alexandros Terzis, Weijin Li, Haibo Zeng
Summary: Dielectric materials with higher energy storage and electromagnetic energy conversion are desired for electronic devices, military stealth, and EM wave pollution mitigation. This review summarizes libraries of dielectric materials meeting device requirements and recent advances in inorganic-organic hybrid materials for efficient energy storage and EM energy conversion, while discussing potential strategies for their commercial adoption.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Wangzhu Cao, Kunfeng Chen, Dongfeng Xue
Summary: In this study, vertically oriented TiO2 nanotube arrays were successfully grown using self-organizing electrochemical anodization, with different parameters affecting their morphology studied. Optimized TiO2 nanotubes with tube diameters of 70-160 nm and tube lengths of 6.5-45 µm were obtained. As lithium-ion battery anodes, they exhibited good kinetic, capacity, and stability performances.
Article
Materials Science, Ceramics
Wenyan Huang, Sridhar Komarneni, Young Dong Noh, Kunfeng Chen, Dongfeng Xue, Hiroaki Katsuki, Jianfeng Ma, Xiaoqiang Xue, Hongjun Yang
Summary: Microwave-hydrothermal synthesis of α-Sn(HPO4)2•H2O (α-SnP) was achieved in as low as 5 minutes at 194 ℃, greatly reducing the reaction time compared to previous methods. The super fast synthesis was attributed to localized superheating, where nucleation and reactions occurred rapidly. Characterization using various microscopy techniques revealed different morphologies of α-SnP under varying conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Shilei Chang, Minjie Hou, Bowen Xu, Feng Liang, Xuechao Qiu, Yaochun Yao, Tao Qu, Wenhui Ma, Bing Yang, Yongnian Dai, Kunfeng Chen, Dongfeng Xue, Huaping Zhao, Xiaoting Lin, Fanny Poon, Yong Lei, Xueliang Sun
Summary: Rechargeable Na-air batteries have high theoretical specific energy density, lower cost, and lower charge potential, but require high purity O2 and face challenges in long cycle and high safety. A quasi-solid-state Na-air battery with a gel cathode achieved high safety and long cycling life by utilizing a gel cathode.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Wenyan Huang, Kunfeng Chen, Sridhar Komarneni, Dongfeng Xue, Hiroaki Katsuki, Woo-Seok Cho, Xiaoqiang Xue, Hongjun Yang, Jianfeng Ma
Summary: This study demonstrates the importance of crystal size and structure of iron oxides in tailoring them for electrode materials. Hematite and akaganeite outperform ferrihydrite in terms of electrochemical properties, even though ferrihydrite has the smallest crystals.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Nanoscience & Nanotechnology
Minjie Hou, Xiecheng Yang, Feng Liang, Peng Dong, Yuneng Chen, Jinran Li, Kunfeng Chen, Yongnian Dai, Dongfeng Xue
Summary: This study comprehensively investigated the corrosion mechanism of NASICON solid electrolyte in acidic solutions with different pH values at multiscale levels, revealing that the decrease in solution pH leads to increased exchange rate between H3O+ and Na+ protons, resulting in crystal lattice distortion and surface crack formation. Various techniques including SEM, XPS, XRD, and Raman spectroscopy were employed to study the morphological transformation, Cl- penetration effect, and proton exchange, providing a deeper understanding of the chemical stability of solid electrolytes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Siqi Liu, Wandi Kuang, Xiangjian Meng, Weiliang Qi, Samira Adimi, Haichuan Guo, Xuyun Guo, Erum Pervaiz, Ye Zhu, Dongfeng Xue, Minghui Yang
Summary: This study reports the synthesis of one-dimensional Co4N-WNx-CdS composites using an efficient electrostatic self-assembly process for visible light-driven hydrogen evolution in pure water. The composites exhibit a high rate of photocatalytic hydrogen evolution under vacuum condition, which is significantly higher than that of traditional Pt-CdS composites.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Physical
Qianyu Hu, Kunfeng Chen, Fei Liu, Mengying Zhao, Feng Liang, Dongfeng Xue
Summary: This paper provides an overview of the application and challenges of machine learning in materials prediction. Taking solid-state electrolytes as an example, it outlines the general process of machine learning in materials prediction and reviews recent approaches and specific applications. The paper also highlights the obstacles caused by disciplinary span and aims to raise awareness among materials scholars about the application of machine learning in materials prediction.
Review
Materials Science, Multidisciplinary
Guoqiang Shi, Dongfeng Xue
Summary: Functional materials exhibit diverse performances due to degrees of freedom in the lattice framework. Research on quantum materials can provide insights into multiscale processes. Understanding the sources of properties of functional materials from multiple degrees of freedom is crucial for their design.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2022)
Article
Physics, Applied
Feng Liu, Kunfeng Chen, Chao Peng, Dongfeng Xue
Summary: This study investigates the multiscale behaviors of sapphire crystal growth along different crystal directions through theoretical and experimental studies. The results show that the growth behavior of sapphire along the c-axis is more complex compared to that along the a- and m-axes, involving solid-liquid and solid-solid transformations. Moreover, an abrupt change in the interfacial structure inhibits the transformation of liquid Al2O3 into α-Al2O3 along the c-axis.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Chun Cai, Dantong Zhang, Qi Zhang, Kunfeng Chen, Wenchao Hua, Chao Peng, Dongfeng Xue
Summary: The stability of lattice oxygen and transition metal sites in LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode were systematically explored, and the importance of manganese was demonstrated. The effects of lithium vacancies on lattice oxygen and transition metal were investigated through vacancy formation energy, unpaired spins, and net charge. This study provides insights into oxygen release and transition metal dissolution in Ni-rich NCM811.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Fei Liu, Mengying Zhao, Kunfeng Chen, Mei Hu, Dongfeng Xue
Summary: This work demonstrates that Ce3+-regulated CoNi-LDHs significantly enhance the kinetics of electron transfer and ion motion by increasing layer positive charges and weakening O-H bonds. The addition of Ce3+ also decreases the energy barrier of proton diffusion and increases the hole carrier concentration, resulting in high rate capacitance and fast charge storage kinetics.
Article
Chemistry, Multidisciplinary
Xianjie Zhang, Feng Liu, Kunfeng Chen, Guilin Zhuang, Chao Peng, Dongfeng Xue
Summary: Investigating the liquid structure of yttrium aluminum garnet (YAG) at high temperatures is significant for various fields, and molecular dynamic simulations were used to study the structure of YAG within a certain temperature range and to grow a YAG single crystal. The coordination number and bond length between cations and anions changed after melting, which can be explained by Pauling's third rule. In the liquid YAG, the coordination number decreased and the main structural units were AlO4 and YO7, which provided insight into phase selection and enabled rapid growth of YAG using the Czochralski method.
Article
Chemistry, Physical
Man Huang, Baojuan Xi, Nianxiang Shi, Jinkui Feng, Yitai Qian, Dongfeng Xue, Shenglin Xiong
Summary: This study presents a novel anode material with heterostructures made of Bi/TiO2 quantum dots embedded into N-doped carbon nanosheets. The integrated design greatly reduces the migration energy barrier of Na+, promotes electron/Na+ transportation, and enhances the electric conductivity and electrochemical reactivity. The Bi/TiO2 HQDs subset of NC hybrid nanosheets show excellent sodium storage properties with high reversible capacity, high rate capability, and long cycle life.
Article
Nanoscience & Nanotechnology
Wei Pan, Mu Zhang, Dongfeng Xue, Xudong Sun
Summary: Prussian blue is a compound with a consistent three-dimensional structure that allows reversible insertion of cations into materials and has diverse electrochemical properties. These materials are synthesized by low-cost precipitation method, exhibiting different morphologies that impact their electrochemical properties, influenced by factors such as particle morphology and transition metal cations.
SCIENCE OF ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Wei Pan, Mu Zhang, Wenyi Tang, Yanyan Man, Kunfeng Chen, Dongfeng Xue, Xudong Sun
Summary: Utilizing a system with a basic polymerized ferric sulfate (BPFS) electrolyte and electroactive graphite electrode, this research achieved high area capacitance and revealed different characteristics of active sites. The study demonstrates that carbon materials are electrochemically activated and can react with iron groups in aqueous solutions, pointing towards the potential development of a low-cost, high energy storage, and high safety system.
SCIENCE OF ADVANCED MATERIALS
(2021)
Article
Crystallography
Jianzheng Hu, Long Yan, Ning Zhou, Yao Chen, Xiaoni Yang, Lianqiao Yang, Shiping Guo
Summary: The effect and mechanism of carrier gas velocity, V/III ratio, and carrier gas velocity match on the growth rate of AlN were investigated in this study. The results showed that the growth rate of AlN initially increased with hydrogen flow rate, reached saturation, and then decreased monotonically. The turning point value depended on the equipment and process. By increasing the MO VM, the growth rate of AlN could be improved, but the uniformity deteriorated due to turbulence and loss of uniform boundary layer. High quality AlN films were successfully grown on nano-patterned sapphire substrates with improved crystalline quality and atomic smooth surfaces.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Tingting Ma, Yang Li, Kangning Sun, Qinglin Cheng, Sen Li
Summary: This study investigates the melting process and nucleation behavior of sodium crystals using molecular dynamics simulation. The results show good agreement between simulated and experimental values for the melting temperature, density, and radial distribution function of sodium. The diffusion coefficient of liquid sodium increases linearly with temperature, and the homogeneous nucleation rate of melting in superheated sodium crystal exponentially increases with temperature. The findings provide theoretical support for applications involving heat and mass transfer in sodium-related systems.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Hisato Nishii, Shintarou Iida, Akira Yamasaki, Takumi Ikenoue, Masao Miyake, Toshiya Doi, Tetsuji Hirato
Summary: Epitaxial V2O3 films were fabricated on sapphire substrates using mist chemical vapor deposition (mist CVD) method, eliminating the need for high vacuum conditions. The films can be grown on sapphire substrates even under atmospheric pressure, with the optimal growth temperature at 823 K. The films grown at 823 K exhibit a metal-insulator transition at approximately 155 K. The film on C-plane sapphire exhibits a lower transition temperature compared to those on R- and A-plane sapphire substrates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Jani Jesenovec, Kevin Zawilski, Peter Alison, Stephan J. Meschter, Sambit K. Saha, Andrew J. Sepelak, Peter G. Schunemann
Summary: In this study, NiSb needles were successfully formed in InSb by manipulating the growth rate and adding NiSb. These needle structures in InSb can be used to tune the magnetoresistance of devices. Additionally, undoped InSb crystals demonstrated good infrared transmission at low growth rates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
D. Joseph Daniel, P. Karuppasamy, H. J. Kim
Summary: The 2-amino 4-methyl pyridinium oxalate (2A4MPO) compound was synthesized and its crystal structure, functional groups, thermal stability, electrical properties, and third-order nonlinear optical properties were studied. The results demonstrate that the synthesized crystal has good structural integrity, thermal stability, and potential for third-order nonlinear optical applications.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
C. W. Lan
Summary: The past two decades have witnessed a significant transformation in solar silicon crystal growth, especially in the competition between multi-crystalline silicon (Multi-Si) and mono-crystalline silicon (Mono-Si). The demand for this crucial material has exponentially surged, with silicon solar panels capturing over 95% of the global PV market share. The advancements in crystal growth technology during this period have set historical benchmarks, with the market share shifting from high-performance multi-crystalline silicon (HPM-Si) to CZ silicon.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peiyao Hao, Lili Zheng, Hui Zhang
Summary: A novel design of argon gas tube for removing impurities during silicon ingot growth was developed, and numerical simulations showed that it can effectively extract SiO.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Geetika Sahu, Chanchal Chakraborty, Subhadeep Roy, Souri Banerjee
Summary: This article discusses the novel fractal nature of hydrothermally synthesized MoS2 QDs. By adjusting the reaction time, the study found that the average size of QDs increases and then decreases with longer reaction times. STEM images indicate that shorter reaction times lead to sheet formation, while extended reaction times cause sheets to fragment into QDs.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Pengjian Lu, Wei Huang, Junjun Wang, Haitao Yang, Shiyue Guo, Bin Li, Ting Wang, Chitengfei Zhang, Rong Tu, Song Zhang
Summary: A systematic study on the tetramethylsilane-hydorgen (TMS-H-2) system for the deposition of pure single-crystal SiC by high-temperature chemical vapor deposition (HTCVD) method is conducted. The study investigates the effect of temperature, pressure, and H-2:TMS ratio on the deposition conditions and provides a theoretical basis and guidance for improving the quality and cost of industrial production of single-crystal SiC.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Xinyu Jiang, Liangliang Liu, Yanqing Liu, Yan Wang, Zhaoping Hou
Summary: Investigation on the preparation of anisometric templated textured high entropy or multi-element doped ferroelectric ceramics was conducted using A-site disordered niobate microcrystals. The effects of process parameters on the morphology and chemical composition were studied, and the photocatalytic properties of the microcrystals were evaluated.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Mobashsara Tabassum, Md. Ashraful Alam, Sabrina Mostofa, Raton Kumar Bishwas, Debasish Sarkar, Shirin Akter Jahan
Summary: In this study, high crystallinity copper nanoparticles were synthesized by altering the reaction medium at low temperatures. The results show that changing the reaction medium can reduce the surface energy of precursors and promote the formation of highly crystalline copper nanoparticles.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Ivan Bodnar, Vitaly V. Khoroshko, Veronika A. Yashchuk, Valery F. Gremenok, Mohsin Kazi, Mayeen U. Khandaker, Tatiana I. Zubar, Daria I. Tishkevich, Alex Trukhanov, Sergei Trukhanov
Summary: This work presents the production of single crystals of Cu2ZnGeSe4, a semiconducting quaternary compound, using a gas chemical method with iodine as a transporter. The phase state, crystal structure, and lattice constants of the synthesized samples were refined and determined. The band gap of Cu2ZnGeSe4 was calculated using transmission spectrum and it was found that the band gap increases by 12% with decreasing temperature in the range of 20-300 K.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Timur Malin, Igor Osinnykh, Vladimir Mansurov, Dmitriy Protasov, Sergey Ponomarev, Denis Milakhin, Konstantin Zhuravlev
Summary: The effect of growth temperature on the buffer leakage currents of GaN-on-Si layers was investigated. It was found that higher growth temperature results in lower leakage currents. The defects in GaN layers grown at different temperatures were studied using photoluminescence technique, and a correlation between leakage currents, structural perfection, and donor concentration in GaN-on-Si layers was established. It was also observed that reduced growth temperature leads to the formation of inversion domains.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Thi-Hoai-Thu Nguyen, Jyh-Chen Chen
Summary: The effect of heater power control on heat, flow, and oxygen transport for CCz crystal growth was studied. Shorter upper side heater design could improve crystal quality and growth, but with higher power consumption.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peter Rudolph
Summary: This article presents an overview of selected contributions to the development of crystal growth technology by the Laudise Prize awardee 2023. It discusses various aspects such as shaped crystal growth, the correlation between melt structure and crystal quality, control of intrinsic defects and inclusions, prevention of dislocation cell patterns, and melt growth experiments under a travelling magnetic field.
JOURNAL OF CRYSTAL GROWTH
(2024)
