Article
Optics
Ganghua Zheng, Bobo Yang, Yuxuan Zhu, Qiyuan Du, Yang Li, Mingming Shi, Rongrong Hu, Chunfeng Guo, Yuefeng Li, Jun Zou
Summary: YAG phosphor composited with CsPb(BrI)(3) nanocrystals in glass was successfully synthesized using a Two-step melting method. By adjusting the mixing ratio, the photoluminescence properties and color characteristics could be controlled, leading to the preparation of a high-performance wLED.
Article
Materials Science, Multidisciplinary
Zhihao Chen, Haiyang He, Zhuoqi Wen, Zhongjie Cui, Shiliang Mei, Dan Yang, Xian Wei, Wanlu Zhang, Fengxian Xie, Bobo Yang, Ruiqian Guo
Summary: This study presents a facile method for gram-scale synthesis of Mn-doped CsPbBr3 perovskite phosphors at room temperature, demonstrating dual-color emission with enhanced red emission. Additionally, two types of WLEDs were demonstrated with different chromatic performances, indicating potential applications in WLED devices.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Multidisciplinary Sciences
E. Kirstein, N. E. Kopteva, D. R. Yakovlev, E. A. Zhukov, E. V. Kolobkova, M. S. Kuznetsova, V. V. Belykh, I. A. Yugova, M. M. Glazov, M. Bayer, A. Greilich
Summary: The spin dynamics and interaction of confined electrons or holes in perovskite nanocrystals are investigated using time resolved optical spectroscopy. Spin mode locking effect and nuclear focusing are observed in CsPb(Cl0.56Br0.44)(3) lead halide perovskite nanocrystals embedded in a glass matrix. The measured spin coherence time and spin dephasing time are 13 ns and a nanosecond respectively, and the developed theoretical model agrees well with the experimental data.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yuqi Huang, Tiange Li, Mengmeng Lei, Xianqing Huang, Tianlin Wang
Summary: In this study, a simple and reproducible method for synthesizing cerium(III)-based blue phosphor was demonstrated, which has applications in warm white-light-emitting diodes (WLEDs) and anticounterfeiting patterns. The mixture of dipicolinic acid (DPA) and Ce3+ in ethanol emitted blue fluorescence under UV induction. The quantum yield of the phosphor was improved by combining it with guanosine 5’-monophosphate (GMP). The study also integrated other ligands to construct full-color and white-light-emitting devices, and encoded anticounterfeiting patterns using lanthanide-based phosphors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Saptarshi Mandal, Swarnali Ghosh, Soumen Mukherjee, Chayan K. De, Debjit Roy, Tridib Samanta, Prasun K. Mandal
Summary: With an increasing bromide content in CsPb(Br/Cl)(3) perovskite nanocrystals (PNCs), various parameters including photoluminescence quantum yield, band edge population, hot exciton trapping time, ON fraction distribution peak, and detrapping rate compared to trapping rate have shown significant increases. Standardized measurements and analyses were conducted to ensure consistency in the results obtained for all three PNCs.
Article
Chemistry, Multidisciplinary
Vasilii V. Belykh, Mikhail L. Skorikov, Evgeniya V. Kulebyakina, Elena V. Kolobkova, Maria S. Kuznetsova, Mikhail M. Glazov, Dmitri R. Yakovlev
Summary: Lead halide perovskite nanocrystals in a glass matrix show excellent optical properties and stability, making them a promising platform for optoelectronic applications. By studying the electron spin properties of these nanocrystals, we uncover their potential for spintronics.
Article
Optics
Bohdan Mahlovanyi, Michael Truax, Andriy Luchechko, Yaroslav Shpotyuk, Guang Yang, Roman Golovchak, Andriy Kovalskiy, Jozef Cebulski
Summary: The optical absorption and photoluminescence properties of novel lithium borate glasses doped with Dy and Ce ions were studied. The optical absorption edge of these glasses appeared in the range of 315-390 nm and varied depending on the alkaline-earth metals used as network modifiers. The photoluminescence spectra of Dy-doped glasses exhibited two intense emission bands at 486 nm and 580 nm, while Ce-doped glasses showed a broad band at 340 nm.
JOURNAL OF LUMINESCENCE
(2023)
Article
Optics
Mengqi Lin, Xizhen Zhang, Lizhu Guo, Linke Song, Yichao Wang, Sai Xu, Jinsu Zhang, Xiangping Li, Baojiu Chen
Summary: Researchers have fabricated novel CsPb(Cl/Br)(3) QDs-Tb3+-Mn2+ trichromatic glasses for white LED application, achieving suitable Ra and color coordinates by optimizing PL peak, concentrations, and heat treatment conditions.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Xiaoqing Chu, Xirong Yang, Zhao Li
Summary: BaSc2O4:Ce3+ phosphor prepared by high temperature solid phase method has good structure and particle properties. It can be excited by ultraviolet light and emit green light with high purity. By combining it with other phosphors, a WLED with good luminous performance can be obtained.
Article
Chemistry, Multidisciplinary
Chen Zhang, Minqiang Wang, Jindou Shi, Junnan Wang, Zheyuan Da, Yun Zhou, Youlong Xu, Nikolai V. Gaponenko, Arshad Saleem Bhatti
Summary: In this study, CsPb(Cl/Br)(3) nanocrystals were grown in-situ in TiO2 hollow shells doped with Eu3+ ions using a modified thermal injection method to prepare CsPb(Cl/Br)(3)/TiO2:Eu3+ composites with direct excitation of white light without additional treatment. The composites showed bright white light emission, high luminous efficiency of 87.39 lm/W, and long-time operating stability, providing new options for the development of perovskite devices.
FRONTIERS IN CHEMISTRY
(2023)
Article
Optics
Han Zhou, Pianpian Wu, Xubo Tong, Hongzhi Zhang, Jin Han, Xinmin Zhang
Summary: This paper reports a simple energy transfer (ET) strategy to enhance Tb3+ emission in Y4Zn4(SiO4)5 (YZS) doped with Ce3+/Tb3+ phosphors under near-UV excitation, allowing the adjustment of emitted light color from blue to green. The improved phosphors show outstanding performance in a WLED device, indicating their potential applications as green-emitting components in near-UV pc-WLEDs.
Article
Chemistry, Physical
Yonghua Chen, Yanbo Zhang, Liang Bao, Wenqiang Liu, Yang Zhang
Summary: The incorporation of silver nanoparticles (NPs) into cesium lead mixed-halide perovskite nanocrystals (NCs) was found to significantly enhance the blue emission intensity and photoluminescence quantum yield (PLQY). However, an excessive amount of silver NPs may reduce the quantum yield of blue emission. Overall, optimization of the size and quantity of Ag NPs can improve the efficiency of blue emission from CsPb(Br/Cl)3 NCs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
Lin Lv, Jianshan He, Qi Xiao, Xingyu Wu, Xinyao Dong, Xiumei Yin, Xixian Luo
Summary: In this study, Y3Al5O12:Ce3+,Cr3+ (YAG:Ce3+,Cr3+) nano-phosphors were prepared using the co-precipitation method, with an average particle size of around 100 nm. Two surface treatments, involving the addition of sodium dodecyl sulfate and the coating of a carbon layer using glucose as the carbon source, were introduced to enhance the uniformity of the nanoparticles. The optical properties and mechanisms of the synthesized YAG:Ce3+,Cr3+ nano-phosphors were thoroughly analyzed, and it was found that the nanoscale YAG:Ce3+,Cr3+ phosphor combined with a 450 nm blue chip exhibited CIE color coordinates (0.30, 0.36) close to standard white light, indicating its potential application in white LED.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Linke Song, Xizhen Zhang, Mengqi Lin, Lizhu Guo, Sai Xu, Jiashi Sun, Jinsu Zhang, Baojiu Chen
Summary: This study investigates the properties and quenching mechanisms of Cu2+-doped perovskite CsPbBr3 quantum dot glasses as long-wavelength-pass filters. The results show that the filters exhibit good transmittance and optical density at low Cu2+ concentrations, while the photoluminescence intensity decreases and the decay rate increases as the Cu2+ concentration increases, indicating a shift from dynamic quenching to static quenching. Furthermore, double-anion CsPb(Cl/Br)3 quantum dot glasses with different Cu2+ concentrations extend the operation wavelength to the blue light region.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Li Zhao, Wu Kunyao, Wang Yanan, Cao Jing, Wang Yongfeng, Lu Yuanyuan
Summary: CaSc2O4:Ce3+ green phosphors were prepared using CaCO3, Sc2O3, and CeO2 as raw materials via a high-temperature solid-phase method in a reducing atmosphere. The product exhibited a broadband green emission peak under blue light excitation.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2022)
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)