Article
Materials Science, Multidisciplinary
Long Wang, Fei Long, Xucheng Li, Chaoyong Deng
Summary: SrSi2O2N2:Ce3+/Eu2+ phosphors were synthesized through a high-temperature solid-state reaction method. Effective energy transfer between Ce3+ and Eu2+ was observed. The energy transfer efficiency was calculated, and the mechanism was determined as dipole-dipole interaction. The influence of co-doping with a charge compensator M+ (M+ = Li+, Na+, K+) on the photoluminescence properties of SrSi2O2N2:Ce3+/Eu2+ was analyzed. It was found that doping with Li+/Na+/K+ significantly improved the photoluminescence properties of SrSi2O2N2:Ce3+/Eu2+ phosphor, with Li+ ions being the best charge compensator for this phosphor.
Article
Chemistry, Physical
Alexis Duval, Yan Suffren, Mourad Benabdesselam, Patrick Houizot, Tanguy Rouxel
Summary: This article reports on the luminescence properties of green Ba4Si6O16:Eu2+, rare-earths (RE) phosphors and discusses its long-lasting phosphorescence in terms of trap depths and concentrations. A second emission band is observed at low temperatures, and a new mechanoluminescence mechanism is proposed.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jinlong Wang, Hao Song, Peipei Dong, Zihan Zhao, Yanjie Zhang
Summary: Nowadays, there is a significant effort to find a general strategy for improving the color uniformity and thermal stability of phosphors, which is crucial for their use in health and comfort lighting. This study successfully prepared SrSi2O2N2:Eu2+/g-C3N4 composites using a simple and effective solid-state method to enhance their photoluminescence properties and thermal stability. The coupling microstructure and chemical composition of the composites were analyzed using high-resolution transmission electron microscopy (HRTEM) and EDS line-scanning. The composites showed dual emissions in blue and green due to the influence of g-C3N4 and 5d-4f transition of Eu2+ ions. Additionally, the composites demonstrated similar photoluminescence intensity and improved thermal stability compared to the phosphor alone. The results suggest that this work provides an easy strategy to create SrSi2O2N2:Eu2+/g-C3N4 composites with a coupling structure for enhanced color uniformity and thermal stability.
Article
Chemistry, Inorganic & Nuclear
Yan Gao, Chao Yin, Pengfei Jiang, Wenliang Gao, Rihong Cong, Tao Yang
Summary: Rare earth polyborate compounds LiCaRE5(BO3)(6) were synthesized by high temperature solid state reactions, with Eu3+ activators doped into close-to-centrosymmetric and strongly-distorted coordination environments. The research found that bright orange-red emission can be observed with a slight increase of the red-to-orange (R/O) ratio as the ionic radius of RE3+ increases.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Optics
Sankaiya Asaithambi, Jinhyeok Lee, Jin-Woong Lee, Byung Do Lee, Min -Young Cho, Woon Bae Park, Kee-Sun Sohn
Summary: We conducted a systematic decay analysis of four sulfide phosphors (SrS:Eu2+, CaAl2S4:Eu2+, KGaS2:Eu2+, and NaBaAlS3:Eu2+). We found that the decay rate increases with the concentration of Eu2+ activator in SrS and NaBaAlS3, while KGaS2 and CaAl2S4 have multiple activator sites resulting in concentration quenching in the slow decay component. We also observed wavelength quenching, where the decay rate increases as the emission probe wavelength decreases, which is active for multi-site phosphors and inactive for single-site phosphors due to inter-activator energy transfer between distinct crystallographic sites.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Multidisciplinary
Jyung-Dong Lin, Yen-Chang Liu
Summary: Green-emitting SrSi2O2N2:Eu2+ and red-emitting Sr2Si5N8:Eu2+ phosphors for white LED were prepared through direct silicon nitridation and Sr(NO3)2 as Sr and O2 sources. The impact of synthesis parameters such as nitridation temperature and particle size of silicon on the photoluminescence behaviors and microstructures of the phosphors were investigated. The results demonstrated the formation of Sr2SiO4 and SrSi2O2N2 phases at 1370 degrees C, with a subsequent transformation to a pure SrSi2O2N2 phase. The emission intensity of SrSi2O2N2:Eu2+ phosphors at 530 nm increased with higher nitridation temperatures and smaller particle size of Si powders. The formation reaction mechanism of SrSi2O2N2 and Sr2Si5N8 was also discussed.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Nataliya L. Gulay, Helena Osthues, Saeed Amirjalayer, Nikos L. Doltsinis, Maximilian Kai Reimann, Yaroslav M. Kalychak, Rainer Poettgen
Summary: The RE2RuIn phases were synthesized and characterized. The structures were refined and the phases were found to have a Pt2ZnCd type structure. The magnetic susceptibility measurements revealed different magnetic behaviors for different RE2RuIn phases, with Lu2RuIn showing Pauli paramagnetism and Dy2RuIn, Ho2RuIn, Er2RuIn, and Tm2RuIn showing Curie-Weiss paramagnetism. Dy2RuIn and Er2RuIn displayed metamagnetic transitions at specific critical fields.
DALTON TRANSACTIONS
(2022)
Article
Optics
Shaofeng Li, Kexin Long, Gaoliang Wang, Liuyang Xu, Honglei Yuan, Xianke Sun
Summary: Ce3+/Eu2+ activated Ba3YB3O9 and Ba1.5Sr1.5YB3O9 phosphors were prepared through solid-state reactions under a reducing atmosphere. Their phase and fluorescence performance were investigated, showing single-phase structure and the potential for generating white light. Tunable luminescence was achieved through Ce3+->Eu2+ energy transfers, with most of the emitted light falling within the white light region. Additionally, substituting Sr2+ for Ba2+ facilitated the production of full-spectrum white light.
JOURNAL OF LUMINESCENCE
(2023)
Article
Engineering, Environmental
Xiangli Wu, Rou Shi, Jilin Zhang, Dawei Wen, Zhongxian Qiu, Xinguo Zhang, Wenli Zhou, Liping Yu, Shixun Lian
Summary: A highly efficient and zero-thermal quenching blue-emitting phosphor has been discovered, with internal and external quantum efficiencies of 97.1% and 61.8%, respectively, and exhibiting zero-thermal-quenching behavior within 150 degrees C. The relationship between thermal stability and quantum efficiency of the phosphor was discussed.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Daiyuan Liu, Ting Wang, Yichun Liu, Chao Wang, Zhichao Liu, Xiaodie Zhu, Ya Liu, Jian Zhang, Zhaowei Teng, Yang Zhong, Yakovlev Alexey Nikolaevich, Xuhui Xu
Summary: The Eu2+, Mn2+ co-doped LiAl5O8 blue-green-emitting phosphors exhibit thermal stability and high luminescence efficiency. Energy transfer from Eu2+ to Mn2+ ions is observed, resulting in a gradual modulation of emitted colors from blue to green. The phosphors also show zero-thermal-quenching luminescence at high temperatures. These properties make them suitable for UV-pumped WLEDs devices.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Haohao Wang, Zhonghu Zhu, Baoliang Ma, Liangshu Wei, Langkai Li
Summary: This study introduces a new heterogeneous precipitation method for preparing SrSi2O2N2:Eu2+ phosphors, which involves precipitation process and high-temperature solid-state process to produce high-quality phosphors with smooth-faced particles. The optimized phosphor exhibits superior performance in photoluminescence, external quantum efficiency, thermal stability, and physical stability compared to commercially used products. This research provides an economic way for producing solid-state lighting with enhanced color quality.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Qi Zheng, Lin Chen, Peng Song, Yanfei Wang, Rongjun Liu, Jing Feng
Summary: The A(2)B(2)O(7)-type compounds RE2FeTaO7 synthesized via a solid-state reaction exhibit lower thermal conductivity and equivalent thermal expansion coefficients compared to other materials at high temperatures, making them potential thermal barrier coating materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Mengfang Chen, Shuzhen Liao, Yue Han, Zhongxian Qiu, Shixun Lian, Jilin Zhang
Summary: Efficient cyan-emitting phosphor with anti-thermal quenching behavior is achieved through structural modulation and codoping Mg2+ and Ge4+. The introduction of Mg2+ dominates the redshift while Ge4+ enhances the emission. This work presents a paradigm for exploring highly efficient and thermally stable phosphors.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Yatish R. Parauha, N. S. Shirbhate, S. J. Dhoble
Summary: In this study, Eu2+, Tb3+ singly doped and co-doped Na2SrPO4F phosphors were synthesized by solid-state reaction method at a relatively low temperature. The Eu2+-doped Na2SrPO4F phosphor exhibited a broad excitation spectra that matched well with near ultraviolet (NUV) LED chips. The co-doped phosphor showed tunable emission compared to the pure Eu2+ doped phosphor. Moreover, the phosphor samples showed potential for white light-emitting diodes (WLEDs) and photovoltaic applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Condensed Matter
Xanthippi Koutsoumbou, Ioannis Tsiaoussis, Georgiana Andreea Bulai, Ovidiu Florin Caltun, Orestis Kalogirou, Charalampos Sarafidis
Summary: Nanoparticles with general formula CoFe2-xRExO4 (RE = Yb, Dy, Gd; x = 0.0-0.3) were synthesized and heat treated for potential application in magnetic hyperthermia. The influence of RE doping on structural, magnetic and thermal properties has been investigated, showing that annealed samples with lower RE content have higher mass magnetization values.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Xiaojiao Kang, Chuanyu Jia, Hongcheng Wang, Yongshan Xiao, Wei Lu
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Engineering, Environmental
Hanwen Liu, Wei-Hong Lai, Hui-Ling Yang, Yan-Fang Zhu, Yao-Jie Lei, Lingfei Zhao, Jian Peng, Yun-Xiao Wang, Shu-Lei Chou, Hua-Kun Liu
Summary: A vacuum-filtration approach is used to coat Co-C polyhedrons onto traditional separators for lithium-sulfur batteries, reducing pore size and blocking the shuttle effect of LiPSs. The Co-C@separator demonstrates excellent cycling stability and high rate performance, offering a facile strategy for improving lithium-sulfur battery performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Physical
Ling-Fei Zhao, Zhe Hu, Wei-Hong Lai, Ying Tao, Jian Peng, Zong-Cheng Miao, Yun-Xiao Wang, Shu-Lei Chou, Hua-Kun Liu, Shi-Xue Dou
Summary: Hard carbon is recognized as a promising anode material for alkali metal-ion batteries, particularly showing outstanding performance in sodium-ion batteries, with in-depth research and commercial prototype demonstration. Challenges and research perspectives for future development and early commercialization of HC-based sodium-ion batteries are also discussed comprehensively.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xiaojiao Kang, Weiwei Yang, Dongxiong Ling, Chuanyu Jia, Wei Lu
Summary: A new far-red emitting phosphor Ba2LuTaO6:Mn4+ has been developed for plant growth lighting, showing good thermal stability and luminescent properties. Experimental results indicate that this phosphor has great potential for use in LED plant cultivation lights.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Multidisciplinary
Jian Peng, Wang Zhang, Zhe Hu, Lingfei Zhao, Can Wu, Germanas Peleckis, Qinfen Gu, Jia-Zhao Wang, Hua Kun Liu, Shi Xue Dou, Shulei Chou
Summary: In this study, a facile ice-assisted strategy was developed to prepare highly crystallized Prussian blue analogues (PBAs) as cathode materials for sodium-ion batteries. By suppressing structure defects, the resulting PBAs exhibited high capacity, long cycling lifespan, and significantly enhanced high/low temperature performance.
Review
Chemistry, Multidisciplinary
Zichao Yan, Lingfei Zhao, Yunxiao Wang, Zhiqiang Zhu, Shu-Lei Chou
Summary: This review comprehensively summarizes the historical progress and research trends of room-temperature sodium-sulfur batteries, emphasizing the issues and solutions in sulfur host design, anode protection, electrolyte optimization, separator modification, and binder engineering. The review aims to provide research directions and fundamental guidelines for practical room-temperature sodium-sulfur batteries.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Lingfei Zhao, Zhe Hu, Zhongyi Huang, Ying Tao, Wei-Hong Lai, Along Zhao, Qiannan Liu, Jian Peng, Yaojie Lei, Yun-Xiao Wang, Yuliang Cao, Chao Wu, Shu-Lei Chou, Hua Kun Liu, Shi Xue Dou
Summary: A lightweight aerogel consisting of MgF2 nanocrystals grown on a reduced graphene oxide (RGO) aerogel matrix is designed as a multifunctional host material for sodium metal batteries, showing significantly enhanced Coulombic efficiency and cycling stability.
ADVANCED ENERGY MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Yao-Jie Lei, Han-Wen Liu, Zhuo Yang, Ling-Fei Zhao, Wei-Hong Lai, Mingzhe Chen, Huakun Liu, Shixue Dou, Yun-Xiao Wang
Summary: Cathode materials for sodium-sulfur batteries have gained significant attention due to their high capacity, non-toxicity, and cost-efficiency. However, the low Coulombic efficiency and cycling decay have hindered the practical application of these batteries. The main challenges lie in the polysulfide shuttle and sluggish kinetics. This review discusses various approaches to improving cathode performance and stability, as well as the influence of cathode choices on overall battery performance. Current research challenges and future perspectives on cathodes for sodium-sulfur batteries are also addressed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lingfei Zhao, Ying Tao, Wei-Hong Lai, Zhe Hu, Jian Peng, Yaojie Lei, Yuliang Cao, Shu-Lei Chou, Yun-Xiao Wang, Hua Kun Liu, Shi Xue Dou
Summary: Sodium (Na) metal anodes are potential candidates for high-energy density and high-power density batteries, but the dendrite growth of Na metal limits their practical applications. Oxygen-rich functional groups can be introduced into carbon fiber cloth to achieve superwettability, providing a wettable matrix to retain liquid Na-K alloy and achieve stable cycling. This concept of enthalpy-driven wettability regulation can be applied to the design of host materials for other liquid metals and alloys.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hang Zhang, Yun Gao, Jian Peng, Yameng Fan, Lingfei Zhao, Li Li, Yao Xiao, Wei Kong Pang, Jiazhao Wang, Shu-Lei Chou
Summary: Prussian blue analogues (PBAs) have high theoretical energy density and low cost, but their high water and vacancy content lower the energy density and pose safety issues. A potassium-ions assisted strategy is proposed to synthesize highly crystallized PBAs, which exhibit increased redox potential and high energy density of approximately 450 Wh kg(-1). In addition, unconventional highly-reversible phase evolution and redox-active pairs were identified for the first time, and the preferred guest-ion storage sites and migration mechanism were systematically analyzed through theoretical calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zhennan Zhu, Xiaojiao Kang, Hongcheng Wang, Fei Zhou, Rihui Yao, Ruiqiang Tao, Honglong Ning, Wei Lu
Summary: Printable, flexible display panels are trending in information display field and require improved mechanical and electrical properties of the materials used. Polymer-metal oxide composites have potential as functional layers in thin-film transistors and can be fabricated through sol-gel processes using polymer-metal salt solutions. Studying the film-forming mechanism of composite ink during solidification is essential for ink component design. However, the complex evolution of the composite structure poses challenges for characterization and analysis. Through various characterization methods and nano-infrared spectroscopy, it was found that the type of functional group significantly affects the morphology of initial particles and determines the microstructure of the composite film. This research provides references for composite ink development and characterization of inks and films with complex compositions.
Article
Biochemistry & Molecular Biology
Yayang Wang, Ziyi Liu, Yuesheng Li, Xiaojie Yang, Lingfei Zhao, Jian Peng
Summary: A facile stirring method was used to fabricate g-C3N4/ZnO nanowire composites, which exhibited superior catalytic efficiency compared to pure ZnO nanowires under simulated sunlight. The optimal doping rate of 25 wt% resulted in a degradation rate of 99.1% for a 20 mg/L methylene blue solution. The enhanced photocatalytic performance can be attributed to the captivating hetero-junction at the g-C3N4/ZnO NW interface, which effectively reduced charge carrier recombination, increased light absorption, and amplified the surface area. These findings suggest that the engineered g-C3N4/ZnO NW heterostructures hold great promise for improving wastewater treatment efficacy.
Article
Chemistry, Multidisciplinary
Xiaojiao Kang, Wei Lue, Baichao An, Zhennan Zhu, Qiwen Pan, Fei Zhou
Summary: Ce3+-Tb3+-Eu3+ triply doped Ba3KPO4(SO4)(2) phosphors were synthesized and extensively studied. The luminescence properties, concentration effect, and energy transfer mechanism were investigated using photoluminescence spectra and decay curves. The luminescent color of the phosphors can be tuned by adjusting the energy transfer between different dopants. The newly synthesized phosphors can be used as a potential color converter with a large color gamut.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Zichao Yan, Lingfei Zhao, Yaru Liang, Lei Zhang, Hanwen Liu, Zhiqiang Zhu, Yunxiao Wang, Shu-Lei Chou
Summary: Shell structure design is an efficient strategy for buffering volume expansion and pulverization. However, constructing a stable shell with high electronic conductivity and feasible pathways remains challenging. In this study, a two-in-one shell configuration was designed for bimetal selenides to achieve fast sodium storage within broad voltage windows.
Article
Engineering, Electrical & Electronic
Ying Pan, Ning Guo, Lu Wang, Jing Li, Wei Lu, Yuqing Miao
ACS APPLIED ELECTRONIC MATERIALS
(2020)
