Article
Chemistry, Inorganic & Nuclear
Hongrui Xiong, Xi Gao, Fei Yuan, Qiqi Wu, Wentao Zhang, Yi Huang
Summary: The orange-emitting Ca5-x(PO4)(2)SiO4:xSm(3+) (C5PSO:Sm3+) phosphor was prepared via a simple solid-state method, and codoped with A(+) (A = Li, Na, and K) for improved luminescence performance. The effects of Sm3+ doping and Sm3+/A(+) codoping on the crystal structure and luminescence performance were investigated. A significant improvement in luminescence intensity was achieved through charge compensation of codoped A(+) ions.
DALTON TRANSACTIONS
(2022)
Article
Engineering, Electrical & Electronic
Yuchen Zhang, Zhikai Liang, Weixian Wang, Yifang Lin, Rong Tang, Jingfei Wang, Daomiao He, Jinhui Liu, Zhong Zhang, Lingzhi Zhao, Bin Deng, Dan Zhang, Ruijin Yu
Summary: A series of Sr3LaNb3O12 phosphors doped with Dy3+ ions were prepared and characterized in this study, showing promising photoluminescence properties under 352 nm excitation. The optimal Dy3+-doped concentration was found to be 0.05 mol, and the prepared white LED exhibited a low color temperature and high color rendering index, demonstrating the feasibility of Sr3LaNb3O12:Dy3+ luminescent material for LED applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Optics
Qiang Ren, Yujing Zhao, Xiulan Wu, Ou Hai
Summary: The research successfully synthesized single-phase phosphor samples co-doped with Tb3+/Eu3+/Tm3+ in LaAl2.03(B4O10)O-0.54, demonstrating potential application value in the field of white-emitting phosphors.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Hee Ju An, Sung Doo Baek, Do Hoon Kim, Jae-Min Myoung
Summary: Perovskite light-emitting diodes (PeLEDs) have attracted considerable attention due to their unique optoelectronic properties, but their performance is limited by low quantum efficiency and unbalanced charge injection. In this study, a novel co-hole transport layer (HTL) was introduced to improve the performance of CsPbBr3-based PeLEDs through efficient energy transfer and enhanced charge transfer. The proposed dual transfer strategy is expected to revolutionize PeLED research.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wenhao Bai, Tongtong Xuan, Haiyan Zhao, Haorui Dong, Xinru Cheng, Le Wang, Rong-Jun Xie
Summary: Ultra-high-efficiency green perovskite light-emitting diodes (PeLEDs) are achieved by regulating charge carrier transport and near-field light distribution to reduce electron leakage and enhance light outcoupling efficiency, resulting in quantum efficiencies surpassing 30%. This is accomplished by using Ni0.9Mg0.1Ox films with high refractive index and increased hole carrier mobility as the hole injection layer, and inserting a polyethylene glycol layer between the hole transport layer and the perovskite emissive layer to block electron leakage and reduce photon loss. This study provides an interesting idea for constructing super high-efficiency PeLEDs by balancing electron-hole recombination and enhancing light outcoupling.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Meng Kuang, Junhao Li, Jinjun Zhang, Jianhong Ding, Ziwang Zhang, Kangrong Huang, Nan Yang, Ziheng Zhang, Mingming Yang, Haiyong Ni
Summary: In this study, the effect of Dy3+ doping on the properties of ScCaBO4 phosphors was investigated, and a series of ScCaBO4:Dy3+ phosphors were prepared by solid-state reactions. The results suggest that Dy3+ concentration can reach 11% while maintaining a pure phase, and the Dy3+ luminescence shows promising performance for near-UV chip based WLEDs.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Mohan Lal Meena, Sudipta Som, Rajneesh Chaurasiya, Shawn D. Lin, Chung-Hsin Lu
Summary: This study developed a series of Na2Ca1-x-yCexMnyP2O7 phosphors using the solid-state reaction method in an H2-N2 environment. The crystal structure, valence state, emission behavior, energy transfer mechanism, and thermal quenching behavior of the phosphors were investigated. Doping with Ce3+ and Mn2+ ions improved the photoluminescence properties of Na2Ca1-x-yCexMnyP2O7, and the addition of Mn2+ ions led to the emission of white light. Energy transfer from Ce3+ to Mn2+ ions was observed, and it was governed by dipole-quadrupole interaction. These phosphors have potential applications in high-power LEDs due to their white light emission, high activation energy, and low thermal quenching behavior.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Alessandro Longato, Sebastiano Picco, Lorenzo Moro, Matteo Buffolo, Carlo De Santi, Nicola Trivellin, Gaudenzio Meneghesso, Matteo Meneghini, Enrico Della Gaspera, Massimo Guglielmi, Alessandro Martucci
Summary: This paper reports on the study of sintered ceramic composites based on a low melting glass with embedded ZnO nanocrystals and commercial YAG:Ce3+ phosphor. The compositions were optimized for stability, sintering efficiency, and thermal conductivity, with the goal of avoiding high temperature sintering while enhancing thermal conductivity through the addition of ZnO. Samples were optically characterized using a GaN high power multimode 450 nm Laser Diode, with a maximum output power of 1.6 W.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
Ruixia Wu, Xiaokang Li, Weiqiang Liu, Liang Zhou
Summary: This article presents white organic light-emitting diodes (WOLEDs) incorporating different emitting layers with blue, green, and red phosphorescent small molecular materials. By selecting different hosts with transmission characteristics, the WOLEDs achieved high efficiencies, low operating voltage, and slow efficiency roll-off. The recombination zone and spectral changes were studied to understand the light-emitting mechanisms. The optimal device exhibited high efficiencies, low operating voltage, and desirable color coordinates.
Article
Chemistry, Multidisciplinary
Pengfei Zhang, Na Li, Zhiting Wei, Ziqi Wang, Mengwei Gou, Lei Zhao, Wenbo Chen, Qinping Qiang
Summary: In this study, red-emitting afterglow phosphor Ca4Nb2O9:Pr3+ was successfully synthesized and found to be able to compensate for the flickering behavior of AC-LEDs, potentially serving as a candidate for application in AC-LEDs.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Optics
Tingtao Meng, Yueting Zheng, Denglin Zhao, Hailong Hu, Yangbin Zhu, Zhongwei Xu, Songman Ju, Jipeng Jing, Xiang Chen, Hongjin Gao, Kaiyu Yang, Tailiang Guo, Fushan Li, Junpeng Fan, Lei Qian
Summary: The demonstration of high-resolution quantum-dot light-emitting diodes using transfer printing and Langmuir-Blodgett film technology has been achieved. A honeycomb-patterned layer of wide-bandgap quantum dots is embedded to reduce leakage current, and both red and green QLEDs are demonstrated. The red devices exhibit high brightness and peak external quantum efficiency.
Article
Engineering, Electrical & Electronic
O. C. Silva Neto, T. A. Lodi, J. G. Oliveira Neto, A. S. S. de Camargo, F. Pedrochi, A. Steimacher
Summary: This work investigated the visible luminescence of Ce3+-doped calcium boroaluminate glasses (CaBAl) and explored their potential applications in optical devices such as LEDs and phosphors. The study analyzed the influence of glass composition on their optical properties, with a focus on the impact of CeO2 concentration on the luminescence performance.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Chuang Wang, Ying Li, Shuanglong Chen, Yanyan Li, Qingyi Lv, Bohuai Shao, Ge Zhu, Lei Zhao
Summary: A novel red emission pyrophosphate phosphor Rb2Ba3(P2O7)(2):Eu3+ was successfully synthesized using a nonlinear optical material-inspired methodology, showing high quantum efficiency, color purity, and thermal stability. This phosphor exhibits excellent luminescence properties and stability against external factors, making it a potential candidate for multifunctional optical applications.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Nanoscience & Nanotechnology
Jose P. S. Cardoso, Maria Rosario Correia, Remy Vermeersch, Dirkjan Verheij, Gwenole Jacopin, Julien Pernot, Teresa Monteiro, Susana Cardoso, Katharina Lorenz, Bruno Daudin, Nabiha Ben Sedrine
Summary: Europium-implanted AlN nanowire pn junctions were annealed at 1000 degrees C and showed increased Eu3+ luminescence intensity with higher fluence, while the contribution from defect-related emissions decreased. This study demonstrates the potential of using Eu-implanted AlN NWs for developing red LEDs with improved luminescence properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yuhan Zhou, Hang Chen, Yuhua Wang
Summary: Silicate phosphor KBaScSi2O7:Ce3+ has been prepared by the solid-state method and can emit cyan light under n-UV excitation. Coating KBSS:Ce3+ on LED chip can generate warm white light with high R-A value and low CCT. KBSS:0.10Ce(3+) exhibits high saturation current and voltage, as well as good color stability under low voltage conditions, suggesting its promising potential in LED and field emission display applications.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Zilong Xiong, Wenzhuo Xue, Mujun Li, Feihu Tan, Yupeng Chen, Hongyu Yu
Summary: In this study, CBS glass/Al2O3 composites were developed for LTCC applications based on a CaO-B2O3-SiO2 (CBS) glass system with a high boron content. The study revealed that the softening of glass and interfacial reaction between the glass and Al2O3 were the two most important factors affecting LTCC's densification process. Real-time shrinkage rate of LTCC during sintering was successfully simulated, and it was proven that the formation of the CaAl2(BO3)O phase played a significant role in reducing glass viscosity and promoting dense structure formation. The resulting LTCC composite exhibited excellent performance for high-frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Saurabh Kumar Sharma, Vinita Grover, Rakesh Shukla, Abid Hussain, Ambuj Mishra, Pawan Kumar Kulriya
Summary: In this study, the disordering caused by swift heavy ion irradiation in two different compositions of pyrochlore structures was investigated. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy were used to analyze the samples before and after irradiation. It was found that both compositions underwent amorphization due to irradiation, with a slower rate observed in Nd1.8Zr2.2O7.1. The irradiation-induced modified track region in Nd1.8Zr2.2O7.1 consisted of defect-rich pyrochlore structure, anion-deficient fluorite structure, and amorphous domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiabei He, Mengshan Song, Ming Yang, Miaomiao Zhu
Summary: This study investigates the influence of ion irradiation on high-entropy ceramics and finds that irradiation-induced lattice rearrangement can improve the radiation resistance of these ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jian Li, Jia Liu, Yongcui Zhang, Wei Sun, Yang Wang, Haitao Wu, Ling Li, Chuanbing Cheng, Yingying Wang, Ke Tan, Futian Liu
Summary: Microstructure design plays a crucial role in regulating the microwave dielectric properties of materials, however, the understanding of frequency temperature stability and related micromechanism remains limited. In this study, a combination of first-principles calculations and experimental observation was used to investigate the correlation among sintering behavior, crystal structure, bonding nature, and microwave dielectric properties of LnPO(4) (Ln = Eu, Pr) ceramics. The research findings systematically clarify the optimized effect and micromechanism of lanthanides on the dielectric properties of monazite ceramics, providing insights into the design and enhancement of microwave dielectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li
Summary: The study investigates the frictional and wear behaviors of carbon fiber-reinforced SiC ceramic matrix composites with different fiber orientations mating with ceramic balls. The results show that fiber orientation significantly affects the friction and wear properties of the composites. Pads with randomly arranged fibers demonstrate better friction stability and lower wear volume, potentially suitable for bearing material applications. The research also explores the factors influencing the formation of continuous tribo-film and identifies abrasive wear and oxidation wear as the dominant wear mechanisms for the friction pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sergey Nikolaevich Perevislov, Ilya Evgenievich Arlashkin, Valentina Leonidovna Stolyarova
Summary: This paper describes the synthesis and sintering of MAX phases in the Zr-Al-C system. Different mixtures of initial Zr/Al/C and Zr/Al/ZrC powders were used to synthesize Zr2AlC and Zr3AlC2 MAX phases. The highest content of Zr3AlC2 MAX phase was obtained using a component ratio of 1:1.5:2-51.1 vol.% of Zr/Al/ZrC powders.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Weijia Luo, Xubin Wang, Baiheng Bai, Jianli Qiao, Xingcong Chen, Yongzheng Wen, Jingbo Sun, Lingxia Li, Ji Zhou
Summary: This study successfully establishes the relationship between internal strain and dielectric loss by synthesizing and designing specific structure of tungsten bronze ceramics, and concludes that controlling internal strain can effectively reduce dielectric loss. This research is of great significance for the development of future all-ceramic non-Hermitian devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
JiaNan Wang, ZhiQiang Li, YongZheng Zhu, Yao Liang, Yan Cui, HuaLong Tao, Bo Song, Alexander Nikiforov, ZhiHua Zhang
Summary: First-principles calculations were performed to investigate the crystal structure, electronic structure, and ion diffusion of sulfur-doped Li2FeSiO4. The results showed that sulfur doping can improve the electronic conductivity and reduce the energy barrier for ion diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Xiaodi Dai, Serdar Aydin, Mert Yuecel Yardimci, Gunter Reekmans, Peter Adriaensens, Geert De Schutter
Summary: This study investigates the rheological behavior, solidification process, and nanostructure changes of sodium hydroxide-activated slag (NH-AAS) and sodium silicate-activated slag (SS-AAS) pastes over time. The results show that NH-AAS and SS-AAS release similar heat and reach a similar reaction degree at their initial setting times, but have different gel structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yanliang Ji, Simon Becker, Zichen Lu, Alexander Mezhov, Regine von Klitzing, Schmidt Wolfram, Dietmar Stephan
Summary: This study reveals the significant influence of resting time on the rheological properties of cement suspensions, which is closely related to non-absorbed polycarboxylate superplasticizers (PCEs) size variation. Adsorbed PCE during resting tends to bridge particles instead of dispersing them, leading to an increased yield stress.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zun Xia, Yedong Rong, Hao Li, Ye Dong, Hongbo Yu, Jie Xu, Xiuhui Wang, Jinlong Yang
Summary: This study presents the synthesis of hollow MgAl2O4 particles in situ within porous ceramics, resulting in volume expansion and the formation of a hierarchical pore structure, leading to a significant improvement in compressive strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Honglong Wang, Zhiguo Sun, Faming Xia, Chenguang Yang, Xiaoguang Wang, Jintang Li, Linxu Jiang
Summary: In this study, the micro-geometry morphology variation and microstructural transformation mechanism of muscovite crystals under electron beam irradiation were explored. The results revealed the instability of the muscovite lattice under irradiation, as well as the expansion and shrinkage of the lattice with increasing dose. The study also identified changes in chemical structure and other mechanisms involved. These findings are significant for the design of radiation-resistant silicate materials and the manufacturing of electronic components used in the aerospace industry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)