Article
Physics, Applied
Qiulin Qu, Qi Liu, Lufeng Chen, Yingxiang Li, Hang Pan, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, amorphous Tm-Ga2O3 films were grown on flexible mica substrates for the development of photodetectors with broadened bandgap and lessened oxygen vacancies. These amorphous films exhibited high performance with low dark current and fast response speed, and maintained good performance after multiple bending cycles. This research sheds light on the potential of flexible devices based on amorphous Tm-Ga2O3 for solar-blind DUV detection.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Danhao Wang, Chen Huang, Xin Liu, Haochen Zhang, Huabin Yu, Shi Fang, Boon S. Ooi, Zetian Mi, Jr-Hau He, Haiding Sun
Summary: This study reports the demonstration of self-powered deep UV solar-blind photodetectors in a photoelectrochemical cell configuration, showing excellent responsivity, fast response speed, and large photocurrent density at 254 nm illumination. The superior performance can be attributed to the successful synthesis of uniform and defect-free AlGaN nanowires as well as the boosted carrier separation and collection efficiency through Ru decoration.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yan Yang, Weiming Liu, Tiantian Huang, Mengxia Qiu, Rui Zhang, Wanli Yang, Junbo He, Xin Chen, Ning Dai
Summary: Flexible sensors and photodetectors are important strategies for advanced devices, and the use of amorphous ALD-Ga2O3 thin films has shown promise in fabricating flexible solar-blind photodetectors (SBPDs). Decorating the ALD-Ga2O3 channels with MoS2 multilayers has been found to improve the photocurrent of SBPDs working in the deep ultraviolet region.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Qiang Wang, Peng Han, Wenjuan Niu, Nan Li, Xuan Mao
Summary: Amorphous coatings offer significant improvements in surface properties of Mg alloys, but comprehensive research on microstructure evolution of particle-substrate interface is necessary to achieve excellent performance. Cold spray technique is capable of preparing amorphous coatings and leads to the formation of grain-refined layer and amorphous regions in the substrate.
Article
Chemistry, Multidisciplinary
Yuehui Wang, Haoran Li, Jia Cao, Jiaying Shen, Qingyi Zhang, Yongtao Yang, Zhengang Dong, Tianhong Zhou, Yang Zhang, Weihua Tang, Zhenping Wu
Summary: High-performance avalanche photodetectors (APDs) based on amorphous Ga2O3 (a-Ga2O3)/ITO heterojunction have been successfully fabricated, showing ultrahigh responsivity, specific detectivity, external quantum efficiency, and exceptional capability for detecting ultraweak signals under 254 nm light irradiation. The superior performance of a-Ga2O3-based APDs can be attributed to intrinsic carrier transport mechanisms in a-Ga2O3 and modified band alignment at the heterojunctions, providing greater design flexibility for wide applications of emerging Ga2O3 semiconductor with improved performance.
Article
Chemistry, Multidisciplinary
Yi-Yu Zhang, Yi-Xiong Zheng, Jun-Yu Lai, Jung-Hun Seo, Kwang Hong Lee, Chuan Seng Tan, Shu An, Sang-Ho Shin, Bongkwon Son, Munho Kim
Summary: In this study, high performance flexible AlGaN/GaN 2DEG-IPDs have been demonstrated by utilizing AlGaN/GaN heterostructure membranes, which were engineered to reduce dark current and boost photocurrent. The use of 2DEG layer in transferrable membranes holds great promise for advanced UV detection systems in various biomedical and environmental applications.
Article
Chemistry, Multidisciplinary
Ping Rong, Shiyong Gao, Shuai Ren, Huiqing Lu, Jun Yan, Lin Li, Mingyi Zhang, Yajie Han, Shujie Jiao, Jinzhong Wang
Summary: A freestanding Bi2S3 nanofibrous membrane (NFM) was prepared via a one-step hydrothermal method, showing excellent flexibility and mechanical stability. The NFM can be bent into any desired form and exhibits a fast response time and robust detection performance. It has potential applications in flexible and wearable devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Optics
Zhihua Zheng, Wen Wang, Feng Wu, Zhiyuan Wang, Maocheng Shan, Yongming Zhao, Weijie Liu, Pengcheng Jian, Jiangnan Dai, Hai Lu, Changqing Chen
Summary: Motivated by the goals of fabricating a highly reliable, high performance, and cost-efficient self-powered photodetector, researchers have developed an organic-inorganic hybrid solar-blind ultraviolet photodetector. The device exhibits high responsivity, sharp cut-off edge, and excellent detection capabilities, making it suitable for solar-blind UV detection.
Article
Chemistry, Multidisciplinary
Qiuchun Lu, Yufei Zhang, Guanlin Yang, Meiling Xiong, Wenqiang Wu, Zhangsheng Xu, Hui Lu, Yegang Liang, Zeping He, Yang Yu, Xiaoming Mo, Xun Han, Caofeng Pan
Summary: A flexible solar-blind photodetectors (PDs) array based on CsCu2I3 film patterns is reported for ultraweak light sensing and light distribution imaging. The array device exhibits long-term stable photoswitching behavior and high responsivity (62 A W-1), with ultralow light detection capability (6.1 nW cm(-2)). In addition, a flame detection and warning system based on a curved solar-blind PDs array is demonstrated for multi-flame monitoring and locating. These results can encourage potential applications of the CsCu2I3 film-based PDs array in optical communication and environment monitoring.
Article
Chemistry, Physical
Yajun Xu, Honglie Shen, Zhen Yue, Shun Wang, Qichen Zhao, Zehui Wang
Summary: Flexible substrates are widely used in Visible-NIR photodetectors. Light-trapping structures with different reflectivity were prepared through alkali etching. PEDOT: PSS films doped with DMSO exhibited the highest conductivity. PEDOT: PSS/UF-Si nanowire device prepared by spin-coating showed the best optoelectronic performance.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Ceramics
Yangyang Gao, Xusheng Tian, Qian Feng, Xiaoli Lu, Chunfu Zhang, Jincheng Zhang, Yue Hao
Summary: e-(AlxGa1-x)2O3 alloy thin films with different aluminum fractions were fabricated on c-sapphire substrates using tin-assisted PLD technique. The crystal quality, chemical composition, and optical properties of the films were investigated. The films were also used for the fabrication of solar-blind photodetectors.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Multidisciplinary
Xuan Xin-Miao, Wang Jia-Heng, Mao Yan-Qi, Ye Li-Juan, Zhang Hong, Li Hong-Lin, Xiong Yuan-Qiang, Fan Si-Qiang, Kong Chun-Yang, Li Wan-Jun
Summary: This study successfully prepared high-performance solar-blind deep UV PDs based on Ga2O3, which maintained good photoelectric performance even after multiple bending, showing good flexibility and stability.
ACTA PHYSICA SINICA
(2021)
Article
Nanoscience & Nanotechnology
Damanpreet Kaur, Rakhi, Pargam Vashishtha, Govind Gupta, Subhendu Sarkar, Mukesh Kumar
Summary: This study reports a simple and cost-effective method to enhance the device performance of amorphous gallium oxide thin film photodetectors by nanopatterning the surface. The formation of ripples on the surface leads to the creation of anisotropic conduction channels and an increase in surface defects, resulting in a reduction in device decay time and an improvement in device speed.
Article
Nanoscience & Nanotechnology
Wan Kim, Tianrui Duan, John H. Perepezko
Summary: During the crystallization of Fe-based metallic glasses, the precipitation of nanocrystals smaller than the exchange length has been found effective in reducing coercivity and increasing saturation magnetization. Rapid heating above 100 K/s can produce nanocrystals well below the exchange length in binary Fe-B alloys. The influence of different heating rates on the crystallization behavior of an amorphous Fe85B15 alloy was investigated, revealing a critical heating rate above which the formation of detrimental Fe3B nanocrystals occurs.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Jiajun Song, Guanqi Tang, Jiupeng Cao, Hong Liu, Zeyu Zhao, Sophie Griggs, Anneng Yang, Naixiang Wang, Haiyang Cheng, Chun-Ki Liu, Iain McCulloch, Feng Yan
Summary: In this study, a high-performance flexible photodetector is realized by gating an organic electrochemical transistor with a perovskite solar cell. The device exhibits high gain, fast response time, and ultrahigh detectivity under a low working voltage, allowing it to track photoplethysmogram signals and peripheral oxygen saturation. This work offers a novel strategy for high-performance flexible photodetectors in low-power, user-friendly, and wearable optoelectronics.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Wenyu Fang, Kuan Kuang, Xinglin Xiao, Haoran Wei, Yue Chen, Mingkai Li, Yunbin He
Summary: Two-dimensional materials, MgAl2Se4 and MgIn2Se4, possess low thermal conductivity and high electrical properties, showing potential applications in nanoelectronics and thermoelectric devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yingxiang Li, Zebin Zhou, Hang Pan, Jian Chen, Yuchao Wang, Qiulin Qu, Dongjiu Zhang, Mingkai Li, Yinmei Lu, Yunbin He
Summary: A self-driven solar-blind ultraviolet photodetector (SBUVPD) was developed by depositing a b-Ga2O3 thin film on a commercially available fluorine doped tin oxide (FTO) substrate using pulsed laser deposition, with multi-layer graphene (MLG) as the top electrode. The introduction of MLG significantly enhanced the photocurrent and responsivity of the photodetector. The device exhibited excellent detection performance, delivering a high photocurrent of 31 nA towards 250 nm-light with an ultra-fast response speed and a maximum responsivity of 9.2 mA/W.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Shuang Yan, Gaochen Yang, Huanfeng He, Qi Liu, Qingqi Peng, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, Hf0.5Zr0.5O2/beta-Ga2O3 heterojunction-based self-driven solar-blind UV photodetectors were constructed by combining ferroelectric Hf0.5Zr0.5O2 material with Ga2O3. The optimized device with a HfZrO2 layer thickness of 10 nm showed remarkable responsivity and detectivity, outperforming single Ga2O3-based devices. The device's performance could be adjusted by varying the poling states of HfZrO2 and showed significant enhancement in the upward poling state.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Shuaibing Gao, Yue Huang, Ying Jiang, Meng Shen, Haitao Huang, Shenglin Jiang, Yunbin He, Qingfeng Zhang
Summary: In this study, Ce4+ and Ta5+ co-modified (Ag0.96Ce0.01)(Nb1-xTax)O3 relaxor antiferroelectric (AFE) ceramics were designed to improve the energy storage properties of silver niobate (AgNbO3). The co-doping strategy not only suppressed the ferrielectric behavior and enhanced the relaxor degree, but also improved the breakdown strength and discharge properties of the ceramics. The resulting ceramic exhibited an ultrahigh recoverable energy density, large power density, and stable discharge capacity over a wide temperature range.
Article
Physics, Applied
Hao Lu, Lei Li, Zhiwu Tang, Maji Xu, Yonghui Zheng, Martin Becker, Yinmei Lu, Mingkai Li, Pai Li, Zaoli Zhang, Peter J. J. Klar, Yunbin He
Summary: We explore the possibility of tuning the metal-to-insulator transition (MIT) of crystalline VO2 thin films by strain engineering. Thin VO2 films on TiO2 (110) substrates are almost fully strained up to thicknesses of about 20 nm and exhibit tensile strain along the c axis of the (high-temperature) metallic rutile phase leading to an increase in the MIT temperature by as much as 30 & DEG;C in comparison to the almost fully relaxed 300 nm-thick VO2 film. The strain gradient within the thicker samples leads to a continuous serial switching of layered regions of the VO2 film from the insulating to the metallic state with increasing temperature.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Yue Chen, Wenyu Fang, Fengxin Liu, Kuan Kuang, Xinglin Xiao, Haoran Wei, Mingkai Li, Yunbin He
Summary: Based on first-principles calculations, the properties and characteristics of Au contacts on different SnO2 interfaces were investigated. The Schottky barrier height (SBH) was found to strongly depend on the interface structure and the presence of oxygen vacancies (VO) in the SnO2 layer. Additionally, doping with low-valence elements can alter the contact properties. The modulation effect of SBH is mainly caused by the rearrangement of interfacial potentials and results in different SBH values.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Pan Huang, Lufeng Chen, Daotian Shi, Qi Liu, Jian Chen, Mingkai Li, Yinmei Lu, Jinming Guo, Yunbin He
Summary: In this study, high-quality beta-Ga2O3 thin films were heteroepitaxially grown on MgO(100) substrates using pulsed laser deposition, and highly-sensitive solar-blind ultraviolet photodetectors were achieved. The beta-Ga2O3 films were single-phase, (100)-oriented, and atomically-smooth with unique columnar nanodomains of 8-12 nm width.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Junnian Chen, Xingfu Xiao, Yue Chen, Mingkai Li, Wenyu Fang, Zixian Yu, Biqi He, Tianyou Zhai, Yunbin He
Summary: This study reports a method of modulating the structural distortion by steric hindrance effects to change the morphology of bismuth bromide chains. By interacting with bismuth bromide, N,N,N & PRIME;,N & PRIME;-tetramethyl-1,4-phenylenediammonium (TMPD)(2+) is used to template regular BiBr5 chains, resulting in a narrow-bandgap mixed 0D/1D (TMPD)(2)(Bi2Br10H2O)-H-. This finding offers new insights into developing narrow-bandgap perovskite hydrates for practical optoelectronic applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Zhenhao Fan, Shuaibing Gao, Yunfei Chang, Dawei Wang, Xin Zhang, Haitao Huang, Yunbin He, Qingfeng Zhang
Summary: Current polymer nanocomposites for energy storage suffer from low discharged energy density and efficiency at high temperature. To solve this problem, polyetherimide (PEI) nanocomposites filled with core-shell structured nanoparticles are developed, which consist of a PLZST antiferroelectric core and an Al2O3 shell. The PLZST core provides a wide temperature range of low remnant electric displacement, improving the electric displacement-electric field loops of the nanocomposites. The Al2O3 shell with similar dielectric constant to the PEI matrix and high thermal conductivity enhances breakdown strength and suppresses conduction loss, resulting in an ultrahigh discharged energy density of 10.20 J cm(-3) at 150 degrees C and a large efficiency of 83.5%.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Yingying Cheng, Jiaxing Mao, Hongyi Zhu, Yanhui Dong, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, a strategy for constructing Ga2O3/BFMO heterojunction-based photodetectors was proposed to enhance responsivity and detectivity by utilizing the built-in electric field and ferroelectric depolarization electric field for carrier separation. The fabricated photodetector exhibited tunable performance under zero bias, with higher performance observed in the upward poling state and under weak light illumination.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Biqi He, Kuan Kuang, Bing Xu, Junjie Tang, Sheng Cao, Zixian Yu, Mingkai Li, Yunbin He, Junnian Chen
Summary: A one-dimensional hybrid lead bromide perovskitoid based on hexamethonium has been developed for broadband red emission. The unique structure results in intriguingly red emission peaking at 692 nm, with a PLQY of around 6.24%. Spectroscopic and computational studies reveal the origin of the red emission.
CHEMICAL COMMUNICATIONS
(2023)
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)
