Article
Materials Science, Ceramics
Chengzhen Liu, Shaohua Feng, Xusheng Xiao, Yantao Xu, Haitao Guo
Summary: Yb3+/Er3+/Ho3+ tridoped tellurite glass exhibits strong mid-infrared emission at 2.85 μm under excitation, with high energy transfer efficiency, showing potential for applications in 3 μm fiber lasers.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Yongqi Zhang, Xiaoxi Li, Weichao Wang, Xianghua Zhang, Yinsheng Xu
Summary: The Yb3+/Ho3+ co-doped TGZ glass exhibits strong emission at 2.9 microns, with Ho3+ emissions increasing and Yb3+ emissions decreasing as Yb3+ concentration increases due to energy transfer. The optimized glass with 3 mol% Yb2O3 and 1 mol% Ho2O3 shows potential for mid-infrared fiber laser applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Zhongyuan Zhang, Weiling Yang, Xiliang Jiang, Shiyi Geng, Xu Zhang, Tianqing Zhang, Xinyu Wang, Xueming Shi, Zhuang Leng, Hai Lin, Keke Huang, Chun Li, Fanming Zeng, Zhongmin Su
Summary: In this paper, 1%Ho3+, 8%Yb3+ and x%Mn2+: BaY2F8 phosphors were prepared and characterized. The results showed the successful doping of Mn2+ ions into BaY2F8 phosphors and the change in relative emission intensity. The phosphors have potential applications in biomarkers, high-resolution imaging, and solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Xiaofan Ge, Zhiying Wang, Xiaoli Bai, Hanyu Xu, Zuoling Fu
Summary: In this study, novel upconversion luminescence phosphors were developed and the intrinsic optical bistability phenomenon was observed. These phosphors exhibit excellent performance and have potential applications in optical switching devices and anti-counterfeiting technology.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Optics
Chunlai Song, Yuxuan Cong, Dechun Zhou, Jilong Cao, Kexuan Han, Chi Zhang, Yuerong Bai, Yuxiao Wu
Summary: Ho3+/Yb3+ co-doped and Ho3+/Yb3+/Ce3+ tri-doped 85TeO2-5Bi2O3-10ZnO glasses were synthesized and their structural and spectral properties were comprehensively investigated. By introducing CeO2 as a glass network modifier, the 2 μm emission behavior was effectively enhanced through the cross-relaxation between Ho3+ and Ce3+. A large emission cross-section and gain coefficient were achieved in the TBZHYC2 glass, indicating its potential as a novel laser glass for 2 μm band infrared fiber lasers. The energy transfer mechanisms between Ho3+/Yb3+ and Ho3+/Ce3+ were also analyzed quantitatively.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Songxuan Liu, Zhiwei Luo, Ping Zhang, Weicheng Lei, Ziyou Zhou, Haozhang Liang, Anxian Lu
Summary: This study prepared Yb3+-Ho3+-Tb3+ co-doped glasses and investigated their physical properties, including crystallization temperature, absorption spectrum, and fluorescence decay lifetime. The results suggest that this series of glasses have potential applications in the field of green light display.
Article
Chemistry, Physical
Julija Grigorjevaite, Arturas Katelnikovas
Summary: Inorganic luminescent materials that can be excited with NIR radiation and emit in the visible spectrum have gained scientific interest. This study reports the synthesis and optical properties of K2Gd(PO4)(WO4):Ho3+ and K2Gd(PO4)(WO4):20%Yb3+,Ho3+ powders. The samples were prepared by solid-state reaction, and it was observed that no concentration quenching was observed in K2Gd(PO4)(WO4):Ho3+ samples. However, adding 20% Yb3+ caused a decrease in Ho3+ emission intensity. Additionally, K2Gd(PO4)(WO4):20%Yb3+,0.5%Ho3+ sample showed high up-conversion emission stability and the red/green emission ratio increased with temperature, which could be used for temperature sensing.
Article
Optics
Limin Liu, Junhao Xing, Fei Shang, Guohua Chen
Summary: Yb3+/Ho3+ dual-doped fluoroborate glasses were characterized for their structure, transmittance, up-conversion emission spectrum, and temperature sensitivity, showing potential applications for up-conversion luminescence and optical temperature measurement.
OPTICS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Karolina Kowalska, Marta Kuwik, Joanna Pisarska, Wojciech A. Pisarski
Summary: This study fabricated multicomponent TiO2-modified germanate glasses co-doped with Yb3+/Ln(3+) (Ln = Pr, Er, Tm, Ho) and demonstrated that the addition of TiO2 significantly enhanced the near-infrared luminescence bands of the glass system. The findings suggest promising applications in optical communications.
Article
Chemistry, Inorganic & Nuclear
Sharafudeen Kaniyarakkal, Kesavulu Culala Rajasekharaudayar, Rajesh Dagupati, Yang Li, Sabina Drewniak, Zhi Chen, Vijayakumar Sadasivan Nair, Shiju Edappadikkunnummal
Summary: In this study, Tm3+/Yb3+ co-doped glasses were developed and the energy transfer processes and up-conversion luminescence mechanism were investigated. The results showed that the developed glasses have promising properties for spectral conversion and emission applications in the visible and near infrared range.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Optics
Chuncheng Zhang, Lijie Cao, Chao Yun
Summary: In this paper, Ho3+/Yb3+ co-doped tellurite glasses were synthesized using the conventional melt-quenching method. When excited by a 980 nm LD, the glasses exhibited an intense and broad mid-infrared fluorescence in the range of 3600 to 4400 nm, with a FWHM of 343 nm, suggesting potential applications in wide band mid-infrared lasers. Additionally, strong mid-infrared emission at 2.9 μm (2730-3030 nm) was observed, with a FWHM of 109 nm and a maximum gain coefficient of 2.16 cm-1 around 2843 nm. The glasses also showed intense visible up-conversion emission bands and near-infrared fluorescence emissions around 1.2 and 2.0 μm. The luminescence properties were detailedly researched under different Yb2O3 concentrations, and the energy transfer mechanism was discussed based on the emission spectra and fluorescence lifetime values. These findings demonstrate the excellent fluorescence properties of the synthesized Ho3+/Yb3+ co-doped tellurite glasses for mid-infrared laser materials.
JOURNAL OF LUMINESCENCE
(2023)
Article
Optics
Yong Li, Wenming Wang, Xianshan Huang, Hongmei Chen, Yan Pan, Xiantao Wei
Summary: Spectral engineering for luminescence materials, which involves the purposeful design and modulation of luminescence properties, is crucial for improving luminescence performance and extending optical applications. In this study, Yb3+-Ho3+-Ce3+ tri-doped Ba4Y3F17 nanoparticles were successfully fabricated in transparent glass-ceramics, demonstrating enhanced upconversion emission and longer lifetimes. Introduction of Ce3+ ions enabled the modulation of emission color and provided insights into energy transfer mechanisms.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Ceramics
Junhao Xing, Fei Shang, Guohua Chen
Summary: The study focuses on the structure, properties, and potential application value of Yb3+/Tm3+ codoped glass suitable for rare-earth-doped luminescence, particularly in the field of optical temperature sensing.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Physics, Applied
J. F. M. Santos, R. F. Muniz, E. Savi, A. A. S. Junior, G. J. Schiavon, A. N. Medina, J. H. Rohling, M. L. Baesso, S. M. Lima, L. H. C. Andrade, T. Catunda, L. A. O. Nunes
Summary: Novel Eu-2+,Eu-3+/Yb3+ co-doping calcium aluminosilicate glasses were developed and characterized for potential application in solar cells as a spectral converter. These glasses exhibit near-infrared emission due to cooperative energy transfer (ET) from Eu2+ and Eu3+ to Yb3+. The efficiency of the energy transfer process was evaluated, and a maximum efficiency of about 85% was achieved.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Applied
M. Seshadri, M. J. V. Bell, V. Anjos, Y. Messaddeq
Summary: This work focuses on the structural and spectroscopic properties of Yb3+ doped and Pr3+/Yb3+ co-doped tellurite glasses. The Raman and FT-IR spectra were used to analyze the bending and stretching modes of TeO2 and Te-OH bonds. Energy bands and radiative transitions of Yb3+ and Pr3+ ions were assigned based on absorption measurements and theoretical models.
JOURNAL OF RARE EARTHS
(2021)
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)