Article
Crystallography
Hui Liu, Yuanzheng Zhu, Jie Ma, Chunguang Chen, Ping Cheng, Shuping Zhang
Summary: In this study, different amounts of Pd-doped CeO2 nanomaterials were synthesized by a hydrothermal method and characterized. The results show that doping Pd can enhance the catalytic activity of CeO2, and the CeO2 sample with 5% Pd doping exhibits the best electrochemical detection capability for phenol.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Crystallography
F. Ayagh, M. R. Nateghi, M. H. Mosslemin, F. Kalantari
Summary: In this study, the effects of polyethylene glycol (PEG) and L-3,4-dihydroxyphenylalanine (L-dopa) as structure directing agents on the growth of tungsten trioxide crystals by solvothermal method in acetonitrile solution were investigated. The presence of PEG and L-dopa led to a change in crystal growth mechanism, resulting in the transformation of crystal faces from stacked layers to smooth facets. The rate of crystal formation and growth was significantly increased in the presence of 5 w% PEG. The crystals grown in the presence of L-dopa were octahedral WO3·0.5H2O with smooth faces, while those grown in the presence of PEG were octahedral and rectangular microcrystals of WO3·H2O. The transparency and electro-optical properties of the crystal layers were improved in the presence of PEG.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Crystallography
Qi Zhang, Li Wang, Yecheng Zou, Yongzhe Li, Yunlong Zhao, Chunyong Hu, Mengyao Geng, Guangchao Yin, Meiling Sun
Summary: A high-performance composite photocatalyst was prepared by using TiO2 nanoflowers dominated by high-energy {001} facets as template and Zn-Cu-In-Se (ZCISe) quantum dots (QDs) as sensitization material. The composite exhibited significantly improved photocatalytic abilities for Rhodamine B (Rh B) under visible light. The enhancements were attributed to the unique surface hetero-junctions and improved charge transport and separation characteristics.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Crystallography
Peng Fei Ji, Peng Fei Li, Yong Li, Hao Jie Du, Ya Juan Hao, Yue Li Song, Feng Qun Zhou
Summary: This study synthesized high-quality CdSe nano flakes with a hexagonal structure and networking structures using an elemental direct reaction method. The band gap of CdSe nano flakes was estimated to be approximately 2.44 eV using the Kubelka-Munk method. Multi-peak emissions were observed at room temperature under the excitation of 325 nm, which were attributed to the transition of band gap, selenium vacancies, interstitial cadmium, and surface defects associated with oxygen. Understanding and regulating the defect states are crucial for the application of CdSe nano flakes in optoelectronic devices.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Crystallography
Yu Wang, Peng Gu, Penggang Wang
Summary: In this study, a 2-inch diameter 4H-SiC single crystal was grown from a Si-Cr-C ternary solution with Al addition, and the surface morphology of the specimen was improved by optimizing the growth conditions. The SiC single crystal grown at 0.1 MPa of He gas showed a stable growth process with a hexagonal shape and a growth rate of about 152 μm/h, thanks to the appropriate thermal field distribution near the growth interface. The use of a specially designed seed holder wrapped by BN cap effectively suppressed the appearance of polycrystalline SiC and solvent inclusions in the grown crystal, but some pore or void defects were still present.
JOURNAL OF CRYSTAL GROWTH
(2023)
Review
Energy & Fuels
Narendra Kurra, Ramesh Naidu Jenjeti
Summary: Self-powered energy autonomy is crucial for the sustainable operation of miniaturized electronics and wireless sensor networks. Microsupercapacitors (MSCs) with high-power density, ultrahigh rate capabilities, and long lifespan serve as maintenance-free micro-power sources. This review discusses the major breakthroughs in MSCs over the past decade, focusing on fabrication techniques and electrode material processing. Innovations in energy harvesting and device design enable the development of self-powered MSCs and potential replacement of bulky electrolytic capacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Chemistry, Multidisciplinary
Bin Huang, Lei Cheng, Xinze Li, Zaowen Zhao, Jianwen Yang, Yanwei Li, Youyong Pang, Guozhong Cao
Summary: This review summarizes the recent advances in the controlled synthesis of hydroxide precursors and the growth of particles. The physical features of precursors significantly affect the electrochemical properties and battery performance of cathode materials. Innovative technologies for precursor modifications and novel precursor synthesis are highlighted. Future perspectives on the development of hydroxide precursors are presented.
Article
Chemistry, Multidisciplinary
Evgeny A. Ekimov, Vladimir S. Krivobok, Mikhail V. Kondrin, Dmitry A. Litvinov, Ludmila N. Grigoreva, Aleksandra V. Koroleva, Darya A. Zazymkina, Roman A. Khmelnitskii, Denis F. Aminev, Sergey N. Nikolaev
Summary: This study focused on the size-controllable synthesis of high-quality SiC nanocrystals, demonstrating the ability to tune crystal size by adjusting synthesis temperature. Optical properties of the SiC crystals were investigated, providing insights into carrier distribution in nanoparticles.
Article
Crystallography
Di Di Li, Xu Jun Su, Jing Jing Chen, Lu Hua Wang, Jun Huang, Mu Tong Niu, Xiaodan Wang, Xionghui Zeng, Ke Xu
Summary: This study investigates the surface morphology and microstructure of c-plane AlN thick films grown by HVPE. The effects of miscut angle of sapphire substrates and HCl gas flow on the surface morphology are analyzed. It is found that AlN films grown on substrate with 4 degrees miscut have lower dislocation density.
JOURNAL OF CRYSTAL GROWTH
(2022)
Review
Biochemistry & Molecular Biology
Ashok Kumar Ganguli, Gajanan B. Kunde, Waseem Raza, Sandeep Kumar, Priyanka Yadav
Summary: The synthesis of nanomaterials with specific morphology is crucial for optimizing their properties and applications. Morphology plays a significant role in the efficiency of photocatalysis, as it affects surface area, crystal facets, and active sites. This study analyzes and compares different morphologies of nanomaterials for photocatalytic applications, such as nanorods, nanoflowers, nanospindles, nanosheets, nanospheres, and nanoparticles. The synthesis strategies and conditions are also evaluated to understand their impact on photocatalytic performance. The study concludes that factors like morphology and surface area are key considerations for selecting an effective photocatalyst.
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)
Article
Chemistry, Multidisciplinary
Gbolahan Joseph Adekoya, Oluwasegun Chijioke Adekoya, Rotimi Emmanuel Sadiku, Yskandar Hamam, Suprakas Sinha Ray
Summary: Atomically thick two-dimensional (2D) materials, especially MXene, have attracted significant attention for their exceptional electrochemical characteristics and potential applications in energy storage devices. This review provides a comprehensive overview of recent achievements in the production of MXene/PPy nanocomposites and discusses the structural-property relationship as well as the effects of MXene incorporation on the thermal, electrical, and electrochemical characteristics of the nanocomposites. The research highlights the potential of MXene/PPy nanocomposites as advanced composite materials in various electrochemical applications.
Article
Chemistry, Inorganic & Nuclear
Rebecca D. McAuliffe, Gabrielle E. Kamm, Matthew J. McDermott, Raphael P. Hermann, Neyanel Vasquez-Garcia, Robert L. Sacci, Kristin A. Persson, Karena W. Chapman, Gabriel M. Veith
Summary: In order to gain a better understanding of polymorph control in transition metal oxides, the mechanochemical synthesis of NaFeO2 was investigated. A direct synthesis of alpha-NaFeO2 through a mechanochemical process was reported. It was found that changing the starting precursors and mass of precursors has an impact on the resulting NaFeO2 structure. The study also showed that the alpha phase is stabilized over the beta phase in oxidizing environments.
INORGANIC CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Chinchu Gibi, Cheng-Hua Liu, Scott C. Barton, Jerry J. Wu
Summary: This review presents the application of well-tuned nanomaterials in heavy metal ion sensing. The sensing performance for heavy metal ions can be effectively influenced by the dimensional characteristics of nanomaterials.
Review
Engineering, Electrical & Electronic
Ajith Mohan Arjun, Megha Shinde, Gymama Slaughter
Summary: Neurotransmitters are crucial small chemical signaling molecules that play a vital role in the proper functioning of the nervous system. Dysregulation of neurotransmitters can lead to various mental disorders, and monitoring their levels is crucial. Electrochemical detection, particularly using MXene composites, holds promise for the early-stage detection of neurological diseases originated from an imbalance in neurotransmitters.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Gang Liu, Zhen Cao, Peng Wang, Zheng Ma, Yeguo Zou, Qujiang Sun, Haoran Cheng, Luigi Cavallo, Shiyou Li, Qian Li, Jun Ming
Summary: This study proposes a strategy of switching electrolytes to tune the properties of the solid electrolyte interphase (SEI), resulting in lithium-ion batteries with higher rate capabilities and wider temperature ranges. A molecular interfacial model is used to explain the differences in SEI formation between ether-based and carbonate-based electrolytes, providing insights into the obtained higher rate performances.
Article
Chemistry, Multidisciplinary
Wandi Wahyudi, Xianrong Guo, Viko Ladelta, Leonidas Tsetseris, Mohamad Nugraha, Yuanbao Lin, Vincent Tung, Nikos Hadjichristidis, Qian Li, Kang Xu, Jun Ming, Thomas D. Anthopoulos
Summary: Solvent-solvent and solvent-anion pairings in battery electrolytes have been identified for the first time using nuclear magnetic resonance spectroscopy. These interactions are enabled by the hydrogen bonding induced by the strong Lewis acid Li+, and exist between the electron-deficient hydrogen (δH+) present in the solvent molecules and either other solvent molecules or negatively-charged anions.
Review
Chemistry, Multidisciplinary
Zhengnan Tian, Yeguo Zou, Gang Liu, Yizhou Wang, Jian Yin, Jun Ming, Husam N. Alshareef
Summary: This article provides a systematic survey of the solvation structure of electrolytes in sodium ion batteries (SIBs) and elucidates their impact on electrochemical performance. The key driving forces of solvation structure formation and recent advances in adjusting SIB solvation structures are discussed in detail. This review is believed to provide new insights into electrolyte optimization strategies for high-performance SIBs and other emerging battery systems.
Article
Chemistry, Multidisciplinary
Zhengnan Tian, Jun Yin, Tianchao Guo, Zhiming Zhao, Yunpei Zhu, Yizhou Wang, Jian Yin, Yeguo Zou, Yongjiu Lei, Jun Ming, Osman Bakr, Omar F. Mohammed, Husam N. Alshareef
Summary: This study proposes a strategy to modulate the water hydrogen bond network by adding sucrose, which improves the practical application of aqueous ammonium ion batteries.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Qujiang Sun, Zhen Cao, Zheng Ma, Junli Zhang, Haoran Cheng, Xianrong Guo, Geon-Tae Park, Qian Li, Erqing Xie, Luigi Cavallo, Yang-Kook Sun, Jun Ming
Summary: This study reveals the mechanism of solvent molecular interaction on battery performance, designs a new electrolyte to stabilize alloying anodes, and demonstrates the impact of different solvation structures on electrochemical properties, achieving superior battery performances.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Qujiang Sun, Zhen Cao, Zheng Ma, Junli Zhang, Wandi Wahyudi, Gang Liu, Haoran Cheng, Tao Cai, Erqing Xie, Luigi Cavallo, Qian Li, Jun Ming
Summary: This study thoroughly investigates the functions of electrolyte components in lithium-ion batteries, sheds light on their roles at the molecular scale, and successfully develops a new non-flammable electrolyte.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yeguo Zou, Zheng Ma, Gang Liu, Qian Li, Dongming Yin, Xuejian Shi, Zhen Cao, Zhengnan Tian, Hun Kim, Yingjun Guo, Chunsheng Sun, Luigi Cavallo, Limin Wang, Husam N. Alshareef, Yang-Kook Sun, Jun Ming
Summary: Electrolyte design is crucial for improving the performance of lithium-ion batteries. However, conventional electrolytes pose safety risks due to their flammability and reactivity at high voltage and extreme temperatures. In this study, a non-flammable fluorinated ester electrolyte was designed, which demonstrated high cycling stability and superior power capability for a graphite||LiNi0.8Co0.1Mn0.1O2 (NCM811) battery operated at high voltage (>4.3 V vs. Li/Li+) and wide temperature variations (-50 degrees C-60 degrees C). Furthermore, the research provided new insights into the molecular-level dynamics and interactions among Li+, solvent, and anion, and facilitated the development of high-safety and high-energy-density batteries for harsh conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Tao Cai, Qujiang Sun, Zhen Cao, Zheng Ma, Wandi Wahyudi, Luigi Cavallo, Qian Li, Jun Ming
Summary: In this study, a novel electrolyte was designed to stabilize alloying anodes by introducing LiNO3 additive, and a new interfacial model was constructed to reveal the effect of the additive on Li+-solvent-anion complex in the electrolyte. It was found that LiNO3 additive could promote Li+ desolvation and improve electrolyte stability by weakening Li+-solvent interaction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Leilei Li, Haoran Cheng, Junli Zhang, Yingjun Guo, Chunsheng Sun, Min Zhou, Qian Li, Zheng Ma, Jun Ming
Summary: Aqueous electrolyte design plays a crucial role in enhancing the energy density and lifespan of aqueous batteries. Various electrolytes have been developed to lower the activity of H2O and mitigate the decomposition. However, a universal model to explain the improved performance is lacking. This Focus Review presents a quantitative and graphical model of the electrolyte solvation structure and metal-ion (de)solvation process to understand the relationship between the electrolyte-electrode interfacial chemistry and electrode performance.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Yeguo Zou, Gang Liu, Yuqi Wang, Qian Li, Zheng Ma, Dongming Yin, Yao Liang, Zhen Cao, Luigi Cavallo, Hun Kim, Limin Wang, Husam N. N. Alshareef, Yang-Kook Sun, Jun Ming
Summary: High-voltage lithium metal batteries, with their excellent energy density, face challenges from oxidation decomposition of electrolytes and uncontrolled lithium dendrite growth. A solvation structure engineering strategy is proposed to design a nonflammable fluorinated electrolyte, which demonstrates superior cycling stability for a LiNi0.8Co0.1Mn0.1O2 (NCM811)-based Li-metal battery. By tuning intermolecular interactions, the electrolyte and electrode performance can be stabilized, providing a pathway for electrolyte design in metal ion batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yuqi Wang, Zhen Cao, Wandi Wahyudi, Zheng Ma, Yao Liang, Luigi Cavallo, Qian Li, Jun Ming
Summary: The classical model of using a half-cell composed of electrode and metal to examine electrode performance in batteries may not be reliable if the electrolyte is chemically unstable. This study demonstrates how the solvent can chemically react with the metal and form by-products that influence the electrode potential and reactions. The study also emphasizes the importance of designing a compatible electrolyte to accurately evaluate electrode performance in batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yuqi Wang, Zhen Cao, Zheng Ma, Gang Liu, Haoran Cheng, Yeguo Zou, Luigi Cavallo, Qian Li, Jun Ming
Summary: We detected the presence of weak solvent-solvent interactions in electrolytes using nuclear magnetic resonance and found that these interactions play a significant role in stabilizing the electrolytes, which is a novel discovery. By studying the role of ethylene carbonate (EC) solvent in lithium-ion battery electrolyte, we found that EC can stabilize linear carbonate solvent electrolyte, particularly diethyl carbonate (DEC), through weak intermolecular interactions, enhancing the energy difference between the orbitals of the Li+(EC)(x)(DEC)(y) complex and demonstrating strong capability against reduction. Our findings were further confirmed in other metal ion batteries (e.g., Na+, K+), highlighting the importance of electrolyte design and deeper understanding of battery performance.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Honghong Liang, Zheng Ma, Yuqi Wang, Fei Zhao, Zhen Cao, Luigi Cavallo, Qian Li, Jun Ming
Summary: This study achieves reversible lithium-ion (de)intercalation in a propylene carbonate (PC)-based electrolyte containing a fluoroether by tuning the solvent-solvent interaction, providing an opportunity to enhance the compatibility of PC-based electrolytes with graphite anodes.
Article
Chemistry, Multidisciplinary
Yuqi Wang, Zheng Ma, Zhen Cao, Tao Cai, Gang Liu, Haoran Cheng, Fei Zhao, Luigi Cavallo, Qian Li, Jun Ming
Summary: Binder in lithium-ion batteries plays a crucial role in ensuring stability by adhering electrode materials tightly. Various binder molecules have been designed to enhance adhesion capability and conductivity. This study reveals that the binder also influences the lithium-ion solvation process on the electrode surface, leading to different side reactions, rate capabilities, and tolerance against solvent insertion.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Haoran Cheng, Zheng Ma, Qian Li, Jun Ming
SCIENCE CHINA-CHEMISTRY
(2023)
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)
