Article
Crystallography
Shih-Wei Ying, Shou-Yen Chao, Ming-Chang Shih, Chien-Jung Huang, Wen-How Lan
Summary: The p-Si/n-MgZnO:Er/Ga2O3/ZnO:In diodes with different Ga2O3 thicknesses were fabricated. The effects of Ga2O3 layer thickness on diode properties were investigated. The Ga2O3 barrier layer improves performance for rare earth-related light-emitting devices.
Article
Engineering, Electrical & Electronic
Osman Cicek, Engin Arslan, Semsettin Altindal, Yosef Badali, Ekmel Ozbay
Summary: This study experimentally demonstrates that the highest sensitivity value (21.2 mV/K) of the Ni-(50 nm)-Au-(100nm)/Ga2O3/p-Si vertical MOS type diode in temperature sensing can be obtained by using the constant capacitance mode at 1 nF, which is higher than the results reported in the literature except in the cryogenic temperature region and near room temperature.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Minghao He, Wei-Chih Cheng, Fanming Zeng, Zepeng Qiao, Yu-Chieh Chien, Yang Jiang, Wenmao Li, Lingli Jiang, Qing Wang, Kah-Wee Ang, Hongyu Yu
Summary: This study demonstrates a beta-Ga2O3 MIS-SBD with Al-reacted aluminum oxide interlayer, showing significantly improved SS compared to conventional MS SBD. The results suggest that the Al-reacted interlayer helps eliminate interface degradation and improves device performance compared to ALD Al2O3.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Review
Physics, Applied
Zeng Liu, Weihua Tang
Summary: This article discusses the recent progress of Ga2O3-based Schottky photodiodes and provides suggestions for Schottky metal selection, interfacial barrier modulation, space electric field adjustment, energy band engineering, and improvement of photodetection performance, aiming to promote the further development of deep-ultraviolet photodetection in the near future.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
J. G. Hao, H. H. Gong, X. H. Chen, Y. Xu, F. -F. Ren, S. L. Gu, R. Zhang, Y. D. Zheng, J. D. Ye
Summary: The construction of lattice-matched p-n heterojunctions using mist-chemical vapor deposition technique on n-type Si-doped alpha-Ga2O3 has demonstrated the potential to improve device performance and rectifying characteristics. Through thermal treatment in oxygen ambient, the reduction of reverse leakage current and the improvement of current rectification ratio were achieved by suppressing interfacial trapping states and activating more shallow acceptors of Ir vacancies in the thin disordered layer at the alpha-Ga2O3/alpha-Ir2O3 interface. The p-type alpha-Ir2O3 with lattice matching properties provides a promising strategy for high-performance bipolar power devices.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
D. Ata, S. Altindal Yeriskin, A. Tataroglu, M. Balbasi
Summary: A metal-polymer-semiconductor (MPS) structure based on 5 wt% graphene doped polyvinyl alcohol thin film was fabricated, and its frequency characteristics were measured. The capacitance and conductance of the structure were found to decrease with increasing frequency, and the interface state density was estimated using various methods.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Engineering, Electrical & Electronic
Ahmad Ehteshamul Islam, Chenyu Zhang, Kursti DeLello, David A. Muller, Kevin D. Leedye, Sabyasachi Ganguli, Neil A. Moser, Rachel Kahler, Jeremiah C. Williams, Daniel M. DrydenO, Stephen Tetlak, Kyle J. Liddy, Andrew J. Green, Kelson D. Chabak
Summary: In this article, a method for reducing defect density at the Al2O3/(010) beta-Ga2O3 interface is demonstrated, and the fabricated devices are characterized using current-voltage and capacitance-voltage measurements, showing low hysteresis and consistent performance.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Materials Science, Multidisciplinary
M. Sunkur, O. Gullu
Summary: This study investigates the impact of a Carmoisine azo dye layer on electronic transport at the p-silicon/Al interface. Various spectroscopic measurements are employed to analyze the Carmoisine dye molecule. The study finds that the Carmoisine dye enhances the performance of the Al/p-Si structures and reduces the ideality factor, while also decreasing the leakage current and defect-trapped charge density.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Jingjing Shi, Chao Yuan, Hsien-Lien Huang, Jared Johnson, Chris Chae, Shangkun Wang, Riley Hanus, Samuel Kim, Zhe Cheng, Jinwoo Hwang, Samuel Graham
Summary: This study investigates thermal transport at beta-Ga2O3/metal interfaces using theoretical modeling and experimental measurements. It highlights the significant impact of metal cutoff frequency on thermal boundary conductance, followed by chemical reactions and defects. Different metals show varying effects on the thermal boundary conductance in these interfaces.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Junhee Lee, Honghyuk Kim, Lakshay Gautam, Manijeh Razeghi
Summary: A highly conductive gallium oxide doped with silicon and indium was grown on a c-plane sapphire substrate using MOCVD. The material exhibited high electron hall mobility and carrier concentration when doped with silicon, but was highly resistive without silicon doping. Indium was found to play a role in passivating electron trapping defect levels in the material.
Article
Materials Science, Multidisciplinary
Mohammad M. Afandi, Seokheon Jeong, Jongsu Kim
Summary: In this study, an NIR-emitting electroluminescent (EL) device based on a Cr3+-doped beta-Ga2O3 on a silicon substrate was investigated. The device exhibited excellent electrical properties and thermal stability. The emitted spectrum was both sharp and broadband, attributed to the incorporation of Cr3+ ions in the beta-Ga2O3 host.
Article
Chemistry, Physical
Chuanyu Zhang, Zhibing Li, Weiliang Wang
Summary: The study discovered that Cu atoms substituting Ga atoms in beta-Ga2O3 result in p-type conductivity. Formation energies of various doped structures were derived based on first principles calculation with dipole correction, revealing temperature and oxygen partial pressure dependence. The critical thermodynamic condition for forming the substitutional structure was also obtained.
Article
Chemistry, Physical
Alexander Uvarov, Alexander S. Gudovskikh, Artem Baranov, Alina A. Maksimova, Dmitriy A. Kudryashov, Ekaterina A. Vyacheslavova, George E. Yakovlev, Vasily Zubkov
Summary: This study demonstrates the feasibility of creating an upper junction of multijunction III-V/Si solar cells using GaP/Si superlattices grown at temperatures not exceeding 400°C with a combination of PEALD and PECVD technologies. The results show that GaP/Si superlattices can enhance the spectral sensitivity of the upper junction in double-junction III-V/Si systems.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Physics, Applied
Mei Cui, Yang Xu, Xinyu Sun, Zhengpeng Wang, Hehe Gong, Xuanhu Chen, Tiancheng Hu, Yijun Zhang, Fang-fang Ren, Shulin Gu, Jiandong Ye, Rong Zhang
Summary: In this study, Ga2O3 solar blind photodetectors with different metal-semiconductor contact configurations were constructed and their performance was compared. The Ti/Ga2O3/Ti device operated in a photoconductive mode with high responsivity and rejection ratio, but exhibited sub-gap response and high dark current. The Ni/Ga2O3/Ni device operated in a mixed photovoltaic and photoconductive mode with decent photoresponsivity, high rejection ratio, and eliminated slow photoresponse.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Yue Sun, Zimin Zhao, Gaohui Wu
Summary: A novel composite with in situ synthesized of Ti2(Al,Si)C solid solution reinforced Al matrix was fabricated via one-step solid solution and densification method. The relationship between microstructure, phase composition and mechanical properties of the composites doped with different Si content and fabricated at different sintering temperature was investigated. The results showed that introducing Si can enhance the hardness and elastic modulus of the composites, and an optimal balance of strength and plasticity can be achieved when the Si content is 2 wt% and the sintering temperature is 570 degrees C.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Electrical & Electronic
Ali Kemal Okyay, Oguz Hanoglu, Mustafa Yuksel, Handan Acar, Selim Sulek, Burak Tekcan, Sedat Agan, Necmi Biyikli, Mustafa O. Guler
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2017)
Article
Engineering, Electrical & Electronic
Halit Altuntas, Turkan Bayrak, Seda Kizir, Ali Haider, Necmi Biyikli
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2016)
Article
Engineering, Electrical & Electronic
Zurab Kushitashvili, Amiran Bibilashvili, Necmi Biyikli
IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY
(2017)
Article
Chemistry, Multidisciplinary
Osman Arslan, Fuat Topuz, Hamit Eren, Necmi Biyikli, Tamer Uyar
NEW JOURNAL OF CHEMISTRY
(2017)
Review
Engineering, Electrical & Electronic
Necmi Biyikli, Ali Haider
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2017)
Article
Engineering, Electrical & Electronic
Amir Ghobadi, Talha Masood Khan, Ozan Onur Celik, Necmi Biyikli, Ali Kemal Okyay, Kagan Topalli
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
(2017)
Article
Chemistry, Multidisciplinary
Kugalur Shanmugam Ranjith, Asli Celebioglu, Hamit Eren, Necmi Biyikli, Tamer Uyar
ADVANCED MATERIALS INTERFACES
(2017)
Article
Chemistry, Multidisciplinary
Osman Arslan, Hamit Eren, Necmi Biyikli, Tamer Uyar
Article
Materials Science, Coatings & Films
Petro Deminskyi, Ali Haider, Evgeniya Kovalska, Necmi Biyikli
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2018)
Article
Materials Science, Multidisciplinary
Ali Haider, Petro Deminskyi, Mehmet Yilmaz, Kholoud Elmabruk, Ibrahim Yilmaz, Necmi Biyikli
JOURNAL OF MATERIALS CHEMISTRY C
(2018)
Article
Multidisciplinary Sciences
Asli Celebioglu, Kugalur Shanmugam Ranjith, Hamit Eren, Necmi Biyikli, Tamer Uyar
SCIENTIFIC REPORTS
(2017)
Article
Chemistry, Physical
Ikram Orak, Hamit Eren, Necmi Biyikli, Aykutlu Dana
APPLIED SURFACE SCIENCE
(2019)
Article
Materials Science, Coatings & Films
Adnan Mohammad, Deepa Shukla, Saidjafarzoda Ilhom, Brian Willis, Blaine Johs, Ali Kemal Okyay, Necmi Biyikli
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2019)
Article
Materials Science, Coatings & Films
Saidjafarzoda Ilhom, Deepa Shukla, Adnan Mohammad, John Grasso, Brian Willis, Necmi Biyikli
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2020)
Article
Chemistry, Multidisciplinary
Mohammad Hossain, Adnan Mohammad, Wayesh Qarony, Saidjafarzoda Ilhom, Deepa R. Shukla, Dietmar Knipp, Necmi Biyikli, Yuen Hong Tsang
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)