Article
Materials Science, Coatings & Films
D. S. Misra
Summary: Single crystal diamonds grown by chemical vapor deposition (CVD) are gaining acceptance in the market for gem purposes and various applications. The nitrogen concentration in CVD diamond crystals is a major concern for certain applications, but it can be tolerated for gem purposes. This study investigates the correlation of nitrogen in different forms of vacancy centers in CVD diamond crystals with different fluorescence properties.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Reza Rahmani Taji Boyuk, Hajar Ghanbari, Abdolreza Simchi, Ali Maghsoumi
Summary: Under special conditions in seedless CVD, large-area 2D WS2 layers with disc-shaped morphology can be grown, which is attractive for the fabrication of optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Wenxiao Hu, Kai Chen, Tao Tao, Xinxin Yu, Jianjun Zhou, Zili Xie, Bin Liu, Rong Zhang
Summary: This paper presents a study on high-quality (100) single-crystal diamond film grown by microwave plasma chemical vapor deposition (MPCVD). By optimizing the pre-etching process, a smooth surface chemical vapor deposition (CVD) diamond layer with low roughness and high growth rate was achieved, showing potential for high-performance hydrogen-terminal diamond-based electronic devices.
Article
Multidisciplinary Sciences
Meiyan Jiang, Chengke Chen, Ping Wang, Difeng Guo, Sijia Han, Xiao Li, Shaohua Lu, Xiaojun Hu
Summary: Researchers have discovered that diamonds are formed from graphite through phase transformation, rather than etching by hydrogen and carbon species piling up, providing a new approach to prepare large-area diamonds based on large-sized graphite under normal pressure. This finding also contributes to the understanding of the growth mechanism of materials with sp(2) and sp(3) electronic configurations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
Fan Zhou, Naichao Chen, Fasong Ju
Summary: By increasing the chemical reaction rate and using graphene oxide particles as adsorbents, it is possible to deposit diamond coatings with large grain size and high thickness on silicon nitride substrates. The dispersed particles can enhance the adhesive strength and crack resistance of the diamond coating, making it a potential technique for achieving desired coatings through accelerated CVD chemical reactions.
Article
Materials Science, Coatings & Films
Ippei Tanaka, Hiroshi Okubo, Yasunori Harada
Summary: The study investigates the synthesis of diamonds on three-dimensional metal surfaces using MVP deposition, focusing on how pressure and bias voltage influence the diamond structure. The results show that MVP makes it possible to deposit diamond on 3D shape substrates, with diamond particles created at specific bias voltages and methane concentrations.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Andrew G. Tomkins, Nicholas C. Wilson, Colin MacRae, Alan Salek, Matthew R. Field, Helen E. A. Brand, Andrew D. Langendam, Natasha R. Stephen, Aaron Torpy, Zsanett Pinter, Lauren A. Jennings, Dougal G. McCulloch
Summary: Ureilite meteorites, which may be the only samples from a dwarf planet's mantle, contain abundant diamonds. Electron microscopy reveals the distribution of lonsdaleite, diamond, and graphite in ureilites, suggesting a formation process involving pseudomorphic replacement of graphite by lonsdaleite, followed by diamond and graphite formation. This process could be used to manufacture shaped lonsdaleite at high pressure and also provides a model that reconciles conflicting observations about diamond formation in ureilites.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Physical
Ming Huang, Bangwei Deng, Fan Dong, Lili Zhang, Zheye Zhang, Peng Chen
Summary: This article provides a comprehensive and comparative review on the selection and preparation of various single-crystal substrates for CVD growth of SCG under different conditions. The growth mechanisms, current challenges, and future development and perspectives are discussed in detail.
Article
Chemistry, Physical
Yajuan Xie, Chengwen Tan, Xiaodong Yu, Zhihua Nie, Zhichao Liu
Summary: In this study, tungsten coatings were deposited at 300-610 degrees C from WF6 and H-2 by atmospheric pressure chemical vapor deposition (APCVD). It was found that regardless of the density of the coating, tungsten powders adhered to the furnace walls. These powders were produced by homogeneous reactions in the gas phase near the substrate and adhered to the inner wall of the furnace as they moved with the fluid. The study discussed the kinetics, structure, and growth mode of tungsten coatings in the APCVD system, highlighting the contributions of homogeneous reactions to the growth of dense tungsten coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Timo Fromm, Sebastian Bruns, Marie-Christin Mueller, Alexander Fink, Rudolf Borchardt, Stefan M. Rosiwal, Karsten Durst
Summary: A novel process was developed for fabricating diamond-metal laminates, with the successful creation of diamond-based biomimetic brick-and-mortar structures. The laminates exhibit high nominal strengths exceeding other ceramic-metal composites by at least a factor of two, with fracture energy in a medium range. Diamond layers provide damage tolerance in the laminates.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
S. Sanders, G. Simkus, J. Riedel, A. Ost, A. Schmitz, F. Muckel, G. Bacher, M. Heuken, A. Vescan, H. Kalisch
Summary: The study successfully produced uniform pinhole-free CsPbBr3 films for PeLED application using a highly scalable showerhead-assisted chemical vapor deposition method. Process conditions for CsBr-rich, stoichiometric, and PbBr2-rich CsPbBr3 layer growth were developed by adjusting the deposition parameters. Although the device efficiency still needs improvement, this represents the first demonstration of PeLEDs containing CsPbBr3 films processed in a perovskite showerhead-assisted CVD reactor.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Chemistry, Physical
Rinat Ismagilov, Sergei Malykhin, Aleksey Puzyr, Artem Loginov, Victor Kleshch, Alexander Obraztsov
Summary: This study compared single-crystal diamond pyramids produced using hot-filament chemical vapor deposition (CVD) and thermal oxidation processes with those produced using plasma-enhanced (PE) CVD. The similarities in morphology, Raman, and photoluminescent characteristics were discussed in connection with the diamond film growth mechanism. The experimental results demonstrated the potential for mass production of single-crystal needle-like diamonds using the HF CVD method, highlighting their practical application.
Article
Chemistry, Multidisciplinary
Lingyu Zang, Long Chen, Dongchen Tan, Xuguang Cao, Nan Sun, Chengming Jiang
Summary: This study discusses the reasons for the formation of different MoS2 morphologies and proposes a possible morphology evolution mechanism. Research shows that CVD is more stable and can produce high-quality mono-layer MoS2 films in the middle of the substrate, providing guidance for improving the stability of CVD and generating large-size mono-layer MoS2 films.
Article
Chemistry, Physical
Qing Zhang, Wanzhen He, Lin Li, Dechao Geng, Zhiping Xu, Huipeng Chen, Wei Chen, Wenping Hu
Summary: This study demonstrates a facile and controllable oxygen-assisted anisotropic chemical etching method for two-dimensional (2D) materials, using MoSe2 as an example. A series of well-defined etched patterns were fabricated by precisely modulating the pretreatment time of oxygen plasma and the etching time. The atomic characterization and density functional theory calculations indicate an energy preference for zigzag edges, and the as-etched MoSe2 flakes exhibited enhanced optoelectronic properties.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jingjing Si, Jinqiu Yu, Haihu Lan, Lixin Niu, Jingrui Luo, Yantao Yu, Linyang Li, Yu Ding, Lei Fu, Mengqi Zeng
Summary: This study demonstrates a chemical potential-modulated strategy to precisely synthesize various ultrahigh-phase-purity ultrathin transition-metal boride single crystals. The ultrathin crystals exhibit exceptional mechanical properties, such as an ultrahigh Young's modulus. This research provides a platform for synthesizing ultrathin single crystals with ultrahigh phase purity and enables extensive research and applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Physics, Applied
Gautier Tetard, Armelle Michau, Swaminathan Prasanna, Jonathan Mougenot, Pascal Brault, Khaled Hassouni
Summary: A numerical model was used to investigate the effect of acetylene concentration on molecular growth and solid particle nucleation in argon-acetylene CCRF discharges. The results showed that at low acetylene concentrations, the ionization kinetic is driven by the Penning process and the molecular growth is governed by neutral polyynes. On the other hand, at high acetylene concentrations, the ionization kinetic is driven by the electron-impact process, leading to increased concentration of neutral polyynes and enhanced nucleation rate.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Physics, Fluids & Plasmas
L. Colina-Delacqua, M. Redolfi, K. Ouaras, J. Nael-Redolfi, X. Bonnin, A. Michau, K. Hassouni, G. Lombardi
Summary: This study presents the design and characterization of a multi-dipolar microwave electron cyclotron resonance (ECR) hydrogen plasma reactor. The reactor features 16 ECR sources uniformly distributed along the azimuthal direction of a cylindrical reactor. Plasma diagnostics and simulations were used to determine key parameters and analyze the reactor's performance.
PHYSICS OF PLASMAS
(2022)
Article
Chemistry, Physical
Priyadharshini Balasubramanian, Christian Osterkamp, Ovidiu Brinza, Maxime Rollo, Isabelle Robert-Philip, Philippe Goldner, Vincent Jacques, Fedor Jelezko, Jocelyn Achard, Alexandre Tallaire
Summary: In this study, properties of negatively charged nitrogen-vacancy (NV-) centers created during single crystal diamond growth on [113]-oriented substrates with N2O as a dopant gas using chemical vapor deposition (CVD) were investigated. The results showed that at moderate growth temperatures, dense NV- ensembles with high NV-/ N0s ratios and high creation yield can be achieved. The material obtained here combines a high NV- density, long coherence times, and partial preferential orientation, making it a promising candidate for diamond-based quantum sensors.
Article
Materials Science, Multidisciplinary
Chaimaa Mahi, Ovidiu Brinza, Riadh Issaoui, Jocelyn Achard, Fabien Benedic
Summary: This study investigates the potential of synthesizing nanocrystalline diamond (NCD) films on glass substrates using a Distributed Antenna Array (DAA) microwave system operating at low temperature and low pressure. The results show that the best film properties are achieved at a substrate temperature below 300 degrees C, including high transmittance, low absorption coefficient, and low surface roughness. The wettability of the surface also changes from hydrophilic to hydrophobic after NCD deposition.
Article
Physics, Fluids & Plasmas
S. O. Makarov, D. P. Coster, E. G. Kaveeva, V. A. Rozhansky, I. Y. Senichenkov, I. Y. Veselova, S. P. Voskoboynikov, A. A. Stepanenko, X. Bonnin, R. A. Pitts
Summary: A new Grad-Zhdanov module is implemented into the SOLPS-ITER code to calculate parallel kinetic coefficients. A complete multi-ion generalization is performed, relaxing the assumption of heavy impurities. A JET-like test simulation is conducted to demonstrate the ability to model a 50/50 deuterium (D) and tritium (T) mixture in SOLPS-ITER.
Article
Physics, Fluids & Plasmas
Deepa Verma, Armelle Michau, Angela Vasanelli, Carlo Sirtori, Khaled Hassouni
Summary: The kinetic behavior of electrons in a thin semiconductor layer subjected to voltage pulses is investigated using particle-in-cell/Monte Carlo collision simulations based on the electron Boltzmann equation. The results show that highly nonlinear interactions between the space-charge field and the electrons lead to oscillations due to the relatively high plasma density. The dynamics and phase-space trajectories of the excited electron waves depend on the doping level. Strong oscillations occur during the relaxation phase and are subsequently damped with time scales between 100 and 400 fs, decreasing with doping level. The emitted power spectra exhibit a high-energy band and a low-energy peak, attributed to bounded plasma resonances and a sheath effect, respectively.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Applied
Glenn O. Kandjani, Pascal Brault, Maxime Mikikian, Gautier Tetard, Armelle Michau, Khaled Hassouni
Summary: Molecular dynamics simulations were used to investigate reactions in a low-pressure methane plasma diluted in argon. A 1D fluid model was utilized to determine the initial molar fractions of species, which served as input for the reactive molecular dynamics simulations. The study was conducted at temperatures of 300, 400, 500, and 1000 K. The results showed that increasing the temperature expanded the range of molecules formed, with C2H as the main precursor and CH3 as the main intermediate precursor for the formation of large molecules.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Quantum Science & Technology
B. Burgler, T. F. Sjolander, O. Brinza, A. Tallaire, J. Achard, P. Maletinsky
Summary: Solid state spins, particularly the Nitrogen-Vacancy (NV) center in diamond, have demonstrated great potential for quantum sensing applications. However, the dominant quantum sensing schemes using microwave or radio-frequency driving have limitations in miniaturization, energy efficiency, and non-invasiveness. In this study, we propose a purely optical approach to coherent quantum sensing using the NV center's N-15 nuclear spin, and demonstrate all-optical free-induction decay measurements on both single spins and spin ensembles. Our results open up possibilities for highly compact quantum sensors in challenging environments.
NPJ QUANTUM INFORMATION
(2023)
Article
Chemistry, Physical
A. Allouch, J. Mougenot, A. Michau, S. Prasanna, P. Brault, F. Maurel, K. Hassouni
Summary: This study investigated the mechanisms of carbon sticking reactions to C-36 and C-C-80 fullerenes using molecular dynamics simulations. The results showed the existence of three possible sticking configurations, and while the two potentials gave similar magnitudes for sticking cross-sections, they yielded different results in terms of sticking mechanisms and configurations.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Applied
Glenn-Christopher Otakandza-Kandjani, Pascal Brault, Maxime Mikikian, Armelle Michau, Khaled Hassouni
Summary: Molecular dynamics simulations are used to calculate the surface loss probabilities of neutral species in an argon-methane plasma. These probabilities account for both sticking and surface recombination. The study considers the formation of reactive and nonreactive volatile species and finds that stable species are reflected when a hydrocarbon film starts growing on the surface. CH3 is mainly lost through surface recombination, leading to volatile product formation rather than film growth. The surface loss probability of C2H is consistent with previous literature, but our results show that its main loss process is surface recombination rather than sticking.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Nuclear Science & Technology
C. Arnas, A. Campos, M. Diez, S. Peillon, C. Martin, K. Hassouni, A. Michau, E. Bernard, N. Fedorczac, F. Gensdarmes, C. Grisolia, B. Pegourie, E. Tsitrone
Summary: During the first phase of operation of WEST, two populations of dust particles were discovered. One is dominated by larger particles resulted from the delamination of tungsten coatings and the emission of droplets of molten materials. The other population consists of tungsten nanoparticles found on the surface of micron-sized particles. These nanoparticles may originate from vapor condensation or the growth of ion-neutral clusters in plasma regions.
NUCLEAR MATERIALS AND ENERGY
(2023)
Article
Quantum Science & Technology
Luca Troise, Nikolaj Winther Hansen, Christoffer Olsson, James Luke Webb, Leo Tomasevic, Jocelyn Achard, Ovidiu Brinza, Robert Staacke, Michael Kieschnick, Jan Meijer, Axel Thielscher, Hartwig Roman Siebner, Kirstine Berg-Sorensen, Jean-Francois Perrier, Alexander Huck, Ulrik Lund Andersen
Summary: This research utilizes a new quantum sensor to record the biomagnetic field of living tissues, aiming to explain the biological action potential response. This method avoids potential damage to target systems caused by traditional invasive methods and provides a new approach to passive sensing and imaging at the microscopic level.
AVS QUANTUM SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Midrel Wilfried Ngandeu Ngambou, Pauline Perrin, Ionut Balasa, Ovidiu Brinza, Audrey Valentin, Vianney Mille, Fabien Benedic, Philippe Goldner, Alexandre Tallaire, Jocelyn Achard
Summary: In this study, the researchers successfully increased the number of NV color centers in diamond by optimizing the ion irradiation conditions and surface preparation, and demonstrated narrow magnetic resonance linewidths.
MATERIALS FOR QUANTUM TECHNOLOGY
(2022)
Article
Nuclear Science & Technology
Nicolas Rivals, Patrick Tamain, Yannick Marandet, Xavier Bonnin, Hugo Bufferand, Richard A. Pitts, Gloria Falchetto, Hao Yang, Guido Ciraolo
Summary: This paper estimates the plasma conditions in the far scrape-off layer (SOL) and the first wall (FW) fluxes in ITER, and investigates the impact of enhanced far-SOL transport on the study results. The results show that increased far-SOL transport leads to higher temperatures on the first wall, and the level of perpendicular transport in the far-SOL is the most relevant parameter for the first wall quantities of interest in the ITER machine.
NUCLEAR MATERIALS AND ENERGY
(2022)
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)