Article
Chemistry, Inorganic & Nuclear
Yuming Gong, Yujun Liang, Shiqi Liu, Haoran Li, Yanying Bi, Qiangke Wang, Yi Dou
Summary: The study focused on developing composite phosphors of CYPO:Ce3+,Mn2+/g-C3N4 with different proportions for highly sensitive optical-temperature measurement. Through X-ray powder diffraction and fluorescence spectroscopy, it was found that the composite phosphors exhibited better temperature-dependent properties compared to pure CYPO:Ce3+,Mn2+. The maximum absolute and relative sensitivities of the designed composite phosphors were determined based on FIR technology, providing a feasible idea for versatile applications in optical-temperature measurement.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Bin Hui, Kai Zhao, Han Si, Xinlin Tong, Xinyi Wu, Li Yin, Saifang Huang
Summary: In this study, a bimodal optical temperature sensor Sr2SiO4:Ce3+/Eu2+/K+ with excellent thermometric sensitivity was synthesized through a high-temperature solid-state reaction method. It shows low cost, high reliability, and high sensitivity, which have attracted increasing research interest in recent years.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Ceramics
Jiaqi Fan, Weiying Zhou, Jiabao Luo, Jilin Zhang, Zhan-chao Wu, Xiaohua Dai, Xinguo Zhang
Summary: The urgent need for efficient and high-purity red phosphors in LED development was addressed in this study. The whitlockite compound Ca19Mn2(PO4)(14) with its compact and compositional-tunable structure was chosen as the phosphor host for Eu2+ sensitization. Various analyses were conducted to investigate the properties of Ca19Mn2(PO4)(14): Eu2+, including Rietveld refinement, steady-state spectra, decay lifetime analysis, and temperature-dependent emission spectra. The results showed that Ca19Mn2(PO4)(14): Eu2+ exhibited strong Mn2+ sensitized emission under 360 nm excitation, with excellent emission engineering achieved through Sr2+ co-doping. The phosphor also demonstrated promising thermal stability. Overall, this study highlights the great potential of Ca19Mn2(PO4)(14): Eu2+ phosphor as an efficient red phosphor for phosphor-converted white LEDs.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Lingling Sun, Huizhong Ma, Liwei Wang, Minqiang Xu, Jun Liu
Summary: Eu2+/Ce3+/Mn2+-doped Y2Mg2Al2Si2O12 phosphors were synthesized and investigated for their luminescence characteristics and energy transfer processes. The phosphors exhibited tunable luminescence and were capable of generating white lights with different correlated color temperatures.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Nailya S. Akhmadullina, Aleksey Ishchenko, Anton S. Lysenkov, Oleg N. Shishilov, Yury F. Kargin
Summary: The Eu2+/Ce3+, Ce3+/Tb3+, and Eu2+/Tb3+ co-doped aluminum oxynitrides Al5O6N prepared by the sol-gel technique showed non-radiative energy transfer among the rare-earth ions. Optimal contents of the REE ions differed in the co-doped samples compared to singly doped ones.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Sen Wang, Haiyan Wu, Xin Wen, Yanqing Luo, Tao Tan, Shengjian Jiao, Ran Pang, Lihong Jiang, Su Zhang, Da Li, Guanyu Liu, Chengyu Li, Hongjie Zhang
Summary: A series of Eu2+/Dy3+ single doped and co-doped Na3Sc2(PO4)(3) phosphors were synthesized and characterized. The Na3Sc2(PO4)(3):Eu2+,Dy3+ phosphor can emit white light and the color coordinates can be adjusted by varying the Dy3+ concentration. The fluorescence lifetime decrease and the application of Dexter's theory confirm the energy transfer from Eu2+ to Dy3+. These phosphors have potential applications in white LEDs.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yanyan Zhou, Yanyan Li, Haoyang Wu, Xiang Li, Shuaishuai Yu, Junxiao Wu, Wenjie Wang, Lei Zhao
Summary: The study synthesized Sr8MgCe(PO4)7:Eu2+ phosphor with a wide yellow emission band and demonstrated its emission characteristics in the spectral range. The phosphor matched well with the excitation spectrum of NUV LED chips and showed energy transfer between Eu2+ ions at different crystallographic sites through time-resolved photoluminescence spectra.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Ceramics
Jiamin Tang, Jiayong Si, Guodong Xie, Gemei Cai
Summary: The new dual-emitting and color tunable single phase of Na2BaSr(PO4)(2):0.03Eu(2+), xMn(2+) (NBSP:0.03Eu(2+), xMn(2+)) phosphor is successfully prepared. The Eu2+ ions occupy the Sr2 and Sr3 site, while the Mn2+ ions occupy the Sr3 site. Strong energy transfer between Eu2+ and Mn2+ exists with a high efficiency of 92%. The color tunable emission from blue to cold white is achieved in these phosphors.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yanxia Zhao, Dan Zhang, Yanhua Song, Zhongliang Li, Baofeng Zheng, Zhibo Zheng, Xiangting Zhang, Haifeng Zou
Summary: A single-phase full-spectrum emission Ca9NaLu0.667(PO4)(7) (CNLP):Eu2+/Mn(2+) phosphor was synthesized and its luminous color was adjusted by changing the content of Mn(2+). The average bond length obtained using Rietveld refinements was used to analyze the occupancy of Eu2+/Mn(2+). The energy transfer process of Eu2+ ? Mn(2+) was discussed, and the ET efficiency reached 77.81%.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Caroline Hasler, Andreas Hauser, Jacob Olchowka, Hans Hagemann
Summary: The study shows that the emission spectrum of Ba7F12Cl2:Eu2+ white phosphor shifts systematically from warm white to cold white with changes in excitation wavelength, and that energy transfer is concentration and temperature dependent. The observation of constant emission lifetimes at different temperatures and concentrations suggests that energy transfer first occurs between the normal states of the Eu ions, followed by relaxation to anomalous emission states.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Jia Zhang, Songsong An, Yuqing Pei, Yining Zhang, Jiajun Chen
Summary: Mechanoluminescence materials, such as MCP phosphors, with tunable emissions have potential applications but their mechanism is not fully understood. By fabricating Eu2+/Mn2+/Ce3+-activated MCP phosphors, researchers obtained intense blue and weak red mechanoluminescence. The position of excited energy levels and traps play a crucial role in determining the ML efficiency. The concentration-dependent ML in MCP:Eu2+,Mn2+-based devices opens up possibilities for visualized multimode anti-counterfeiting.
INORGANIC CHEMISTRY
(2023)
Article
Optics
Yinkun Li, Wanjun Tang, Guangyong Xie, Yuhong Yuan
Summary: Ce3+ ion doping successfully facilitates the reduction of Eu3+ to Eu2+, leading to an increase in the effective number of Eu2+ ions in the crystal lattice. Under 393nm radiation excitation, the integrated luminescent intensity of Sr9MgK(PO4)(7):0.01Eu(2+), 0.06Ce(3+) is found to be about 163% that of Sr9MgK(PO4)(7):0.01Eu(2+).
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Lin-Ying Shi, Dan Zhao, Rui-Juan Zhang, Shuang-Yin Zhu, Meng-Han Yu
Summary: The Eu2+ ion is an important activated ion due to its symmetry-allowed electron transition. A new type of blue phosphor, NCMP:xEu(2+), was successfully prepared. Eu2+ serves as a sensitizer ion in this phosphor. NCMP:xEu(2+) with optimal concentration of x = 0.18 exhibits high quantum efficiencies and thermostability. It can be used in the production of a white illuminating lamp.
DALTON TRANSACTIONS
(2022)
Article
Optics
Ying Xiong, Jian Liu, Jingwen Zhang, Fabin Cao, Xingmei Shen, Weiming Liu, Xingrong Wu, Zhaojin Wu
Summary: Ca2Mg0.75Al0.5Si1.75O7: Eu2+/Ce3+ melilite phosphors with emission from blue to green were prepared through Eu2+/Ce3+ doped molten high-alumina blast furnace slag, quenched by icy water, and heat treatment. The Eu2+/Ce3+ emission structural unit revolution processes and Eu2+-Ce3+ energy transfer pathways were systematically studied. The Ca2Mg0.75Al0.5Si1.75O7: 0.4Eu2+,0.4Ce3+ phosphor emits green light under excitation at 385 nm wavelength and possesses good luminescence thermal stability at 150 degrees C.
JOURNAL OF LUMINESCENCE
(2023)
Article
Spectroscopy
Heng Dai, Zhuowei Li, Miao Gao, Yuehui Yan, Chuang Wang, Shuangyu Xin, Ge Zhu
Summary: White light emission phosphors with adjustable emission and good thermal stability are synthesized in this study. The emission spectrum of the phosphors can be tuned by adjusting the doping ratio, showing potential for solid state lighting applications. Energy transfer efficiency and mechanism from Tm3+ to Dy3+ are further investigated to enhance their optical performance.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
