Article
Optics
Xunsheng Zhou, Baolong Wang, Aihua Yao, Shuang Lu, Ying Hong, Shanshan Hu, Jun Cheng, Yinzhen Wang, Cailin Wang
Summary: Te4+-doped YCa4O(BO3)3 phosphors were successfully prepared by a high temperature solid-state reaction method, showing strong fluorescence properties and linear temperature response.
JOURNAL OF LUMINESCENCE
(2021)
Article
Instruments & Instrumentation
Yuxia Zhang, Liang Dong, Wenjuan Han, Honghao Xu, Junhai Liu
Summary: The polarized absorption and emission spectra of Yb:LaCa4O(BO3)3 crystals were examined and the performance of microchip lasers using these crystals were investigated. The crystals, cut along their principal optical axes, showed strong absorption at 977.2 nm and the largest absorption cross-section among Yb-doped oxyborates. However, the crystals exhibited the smallest cross-section for the main emission band. The microchip lasers operated in different wavelength ranges with high optical conversion efficiencies.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Xiangqiao Feng, Feiyan Long, Baoling Wang, Zhehui Weng, XiaoYan Wang, Yizhou Li, Haidong Ju
Summary: Ba7(BO3)3(SiO4)Br:Ce3+ phosphors were synthesized by high temperature solid-state reaction, and the effects of Ce3+ ion concentration and lattice sites on the emission properties were investigated. The phosphors exhibited good thermal stability, providing a new approach for designing phosphors for solid-state white lighting.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Masato Iwaki, Haruto Sato, Mizuki Watanabe, Kazuyoshi Uematsu, Mineo Sato, Kenji Toda
Summary: Ce3+, Tb3+ co-doped multicolour emission phosphors exhibit highly efficient green emission through energy transfer from Ce3+ to Tb3+. However, the spectral mismatch between the emission peak of near ultraviolet LEDs and the absorption wavelengths in most Ce3+, Tb3+ co-activated phosphors leads to low emission efficiencies in phosphor-converted white LEDs (pc-wLEDs). In this study, Ce3+, Tb3+ co-activated ScCaO(BO3) (SCBO) multicolour phosphors with the orthorhombic warwickite structure were successfully synthesized for the first time, showing bright blue or green emission under near UV excitation around 390 nm due to energy transfer from Ce3+ to Tb3+. The internal quantum efficiency of SCBO : 0.01Ce(3+), 0.15Tb(3+) was reported to be 62% under the near UV excitation at 390 nm. Rietveld refinement, photoluminescence properties, and decay curve analysis using the Inokuti-Hirayama model were conducted to verify the potential of SCBO for optical devices, especially backlighting LEDs.
MATERIALS ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Jin Zhao, Xin Wang, Qing Pang, Aiping Zhang
Summary: The Ba3Y(BO3)(3): Ce3+, Nd3+ phosphor with NIR emission can improve the efficiency of silicon solar cells by transferring sunlight to the optimal response range of the cells. Ce3+ acts as an efficient sensitizer with broad absorption cross-section, making it a promising application for solar spectral conversion in silicon-based solar cells.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Crystallography
Gabor Mandula, Zsolt Kis, Krisztian Lengyel, Laszlo Kovacs, Eva Tichy-Racs
Summary: A series of pump-probe spectral hole-burning experiments were conducted on Yb3+- or Er3+-doped Li6Y(BO3)(3) (LYB) single crystals in different temperature ranges. The results showed that the spectral hole structure was complex for Yb3+ with narrow and broad bands, while a single absorption hole was observed for Er3+. The population relaxation times (T-1) and dipole relaxation times (T-2) varied for different transitions and the spectral diffusion rate was different in Yb3+-doped crystal. The temperature dependence of spectral hole halfwidth was also investigated.
Article
Chemistry, Physical
Dan Zhang, Xiangting Zhang, Zhengce An, Rujia Dong, Zhan Shi, Yanhua Song, Haifeng Zou
Summary: The single-phase Ba3Sc(BO3)(3):Ce3+/Tb3+ samples were synthesized via high-temperature solid-state reaction, characterized by XRD, Rietveld refinement, and TEM. The research discussed in detail the photoluminescence emission and excitation spectra, lifetime decay behavior, and thermal stability of the phosphors. The energy transfer mechanism of Ce3+ to Tb3+ and the temperature-dependent PL spectra of the phosphors demonstrated excellent performance, making the green Ba3Sc(BO3)(3):2%Ce3+,6%Tb3+ phosphor desirable for white LED applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Yunlin Yang, Bibo Lou, Yiyi Ou, Fang Su, Chong-Geng Ma, Chang-Kui Duan, Pieter Dorenbos, Hongbin Liang
Summary: Ce3+-doped LiSr4(BO3)3 phosphors were synthesized using a high-temperature solid-state reaction method, and their structure and luminescence properties were investigated. The results showed that Ce3+ ions preferentially occupied the Sr2+ sites in LiSr4(BO3)3, and concentration quenching did not occur. Thermal ionization was found to be the dominant mechanism for thermal quenching of Ce3+ luminescence.
INORGANIC CHEMISTRY
(2022)
Article
Optics
Wenjuan Han, Liang Dong, Youshi Zhou, Yuxia Zhang, Honghao Xu, Junhai Liu
Summary: Polarized absorption and emission cross-sections were determined for an Yb-doped La-containing mixed oxyborate crystal. The crystal exhibited strong absorption at a specific wavelength and dominant polarization for emission, indicating efficient laser emission. The use of appropriate crystal cutting and resonator structure led to high optical-to-optical efficiencies in the laser output.
LASER PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Shuai Yang, Yannan Dai, Jiwei Tan, Qingbiao Zhao
Summary: In this study, a single-composition white emission phosphor YAl3(BO3)(4):Bi with three primary color emissions was reported. The presence of both Bi3+ and diluted Bi4+ in the phosphor is responsible for the three emission bands. The stabilization of the exotic oxidation state of Bi4+ through a cation-deficiency approach opens up new possibilities for next generation white emission phosphors.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Sanjay Prakash Hargunani, Rajkumar Pandurang Sonekar, Anoop Singh, Ajit Khosla, Sandeep Arya
Summary: Ce3+ activated Sr3Y(BO3)(3) phosphors were synthesized by the solution combustion method and characterized for their structural, morphological, and optical properties. The phosphors showed broad photoluminescence excitation wavelength band and exhibited concentration quenching at high Ce3+ ion concentration.
MATERIALS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Riti Ghosh, Shankhanil Sarkar, Yatramohan Jana, Danuta Piwowarska, Pawel Gnutek, Czeslaw Rudowicz
Summary: We investigate the low-symmetry properties and reliability of crystal-field parameters through calculations of energy levels of Eu3+ ions doped in various hosts. Two independent modeling approaches were used and compared with observed values. The study highlights the importance of clear definitions of axis systems and adequate treatment of actual site symmetry for low-symmetry crystal-field parameter modeling.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Optics
Fenfen Liu, Liang Dong, Junxian Chen, Junhai Liu
Summary: The (Yb, Y, Lu, Gd) mixed oxyborate crystal Yb0.19Y0.34Lu0.12Gd0.35Ca4O (BO3)(3) exhibits polarized spectroscopic properties and efficient laser emission, with the main emission band strongest for E//Z orientation. Laser emission efficiency can be achieved with a Y-cut crystal under broad-band 937 nm or narrow-band 973 nm pumping, reaching output powers of 7.36 W to 16.80 W with high slope efficiencies.
JOURNAL OF LUMINESCENCE
(2021)
Article
Microbiology
Zitao Guo, Yuliang Yang, Qianjie Wu, Meng Liu, Leyuan Zhou, Liang Zhang, Dake Dong
Summary: This study investigated the skin microbiota of Asian acne patients using 16S and 18S rRNA gene sequencing. The results showed that the species diversity of the skin microbiota did not differ significantly between groups. However, there were significant alterations in the abundance of certain bacteria and fungi in severe acne patients, particularly a decrease in Pseudomonas and Ralstonia and an increase in Pseudidiomarina and Candida. Additionally, different acne sites had different biomarkers, with the cheek having the highest number of biomarkers.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Biochemical Research Methods
Yan Sun, Jiangmei Huang, Zhiwei Wang, Ni Pan, Cuihong Wan
Summary: This study identified stress-responsive microproteins in Saccharomyces cerevisiae using mass spectrometry-based proteomics, revealing their involvement in stress-related processes such as cell redox reactions, protein folding and degradation. It provides valuable information for understanding the functions of these microproteins and improving the stress tolerance of S. cerevisiae.
JOURNAL OF PROTEOME RESEARCH
(2022)
