Article
Materials Science, Ceramics
Mengfang Chen, Shuzhen Liao, Yue Han, Shixun Lian, Jilin Zhang
Summary: This study reports a blue-emitting phosphor Na2MgSiO4:Ce3+ where Ce3+ occupies the Na+ sites, showing tunable emission color characteristics. The relationship between crystal structure and luminescent properties was studied through structural refinement and in-depth luminescent studies. The phosphor with proper Ce3+ content exhibited a high absolute quantum efficiency of 86.0% and acceptable thermal stability. The pc-wLED made of 365 nm UV chip, Na2MgSiO4:Ce3+,Li+, and commercial green and red phosphors showed good performance with a color rendering index of 93.3.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Bina Chaudhary, Yuwaraj K. Kshetri, Dhani Ram Dhakal, Soo Wohn Lee, Tae- Ho Kim
Summary: This report demonstrates the research progress on photon upconversion in CaSiO3 wollastonite through Yb and Tm doping, resulting in ultra-violet, blue, and near-infrared emissions.
Article
Chemistry, Physical
Amos Vincent Ntarisa, D. Joseph Daniel, D. Balaji, Arumugam Raja, H. J. Kim, Nguyen Duy Quang
Summary: In this study, powder samples of pure and Ce3+ doped cesium barium yttrium hexaborate were synthesized using a standard solid-state reaction technique. Various characterization techniques were employed to investigate the properties of the prepared samples. The rare earth ion Ce3+ was found to enhance the intrinsic luminescence of the phosphors, with an optimal doping concentration of 4 mol%. Additionally, the luminescence properties of the prepared phosphors were studied in detail for the first time in this manuscript.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Haihong Yin, Chenyuan Zhao, Lin Qin
Summary: This study synthesized blue-emitting Sr5Al2F16:Eu2+ phosphors through a solid-state reaction, confirming their phase structure and absorption properties. The optimal doping concentration of Eu2+ ions was determined to be 2.0 mol%, with good emission performance across a range of temperatures, suggesting their potential as candidate materials for WLEDs.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Applied
Yipeng Zhou, Yunsheng Hu, Ronghui Liu, Yuanhong Liu, Weidong Zhuang, Min Cao, Tongyu Gao, Junhang Tian, Yanfeng Li, Guantong Chen
Summary: A broadband blue-emitting Sr1-xCaxLu2O4:Ce3+ phosphor was synthesized for near-UV pumped white light-emitting diodes (w-LEDs). By partially substituting Sr2+ with Ca2+ (x = 0-0.2), the emission peak red-shifted, external quantum efficiency increased, and thermal stability improved in Sr1-xCaxLu2O4:Ce3+. The potential of Sr1-xCaxLu2O4:Ce3+ as blue phosphors for high CRI w-LEDs application was demonstrated.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Inorganic & Nuclear
Zikai Meng, Zhen Guo, Jiajia Cao, Zihui Li, Jihua Zhu, Zhenbin Wang, Cunhua Ma, Mingjin Zhang, Weisheng Liu
Summary: In recent years, there have been significant advancements in the development and utilization of persistent luminescence materials that can be excited by blue light. However, the challenge of developing a highly efficient red-emitting persistent phosphor remains. This study successfully synthesized a novel blue-light excited red-emitting persistent phosphor CaCd2Ga2Ge3O12:Pr3+ and investigated its luminescence properties. This phosphor holds great promise for applications in AC-LEDs, bio-imaging, and other fields.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Haonan Yu, Jingming Chan, Balaji Devakumar, Xiaoyong Huang
Summary: In this article, a new highly efficient Mn4+ ion-activated Li3La3W2O12 (LLWO) far-red emitting phosphor was synthesized and characterized. The LLWO:Mn4+ phosphors exhibited bright narrowband far-red emission peaking at 719 nm, which matched well with the absorption spectrum of phytochrome PFR. The phosphors could be efficiently excited by both ultraviolet and blue LED chips, and a LED device utilizing the LLWO:1.2%Mn4+ phosphor showed dual emission bands of blue and far-red.
MATERIALS TODAY CHEMISTRY
(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
Chemistry, Multidisciplinary
S. Wu, Y. Fu, Q. Liu, P. Xiong, D. Wang, G. Zhang, S. Yuan, Y. Chen
Summary: This study reports a bismuth-doped cyan phosphor, SrLaGaO4:Bi3+, which solves the cyan gap in phosphor-converted white light-emitting diodes. The properties of the phosphor were systematically investigated, and its performance in full-spectrum white light-emitting diode devices was evaluated. The results show that SrLaGaO4:Bi3+ plays an essential role in bridging the cyan gap and provides new possibilities for full-spectrum white lighting.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Zheng-Guang Wu, Bing Yang, Yu-Chen Qiu, Yang Wang, Hong Dai, You-Xuan Zheng, Yi Wang, Lanping Hu, Yi Pan
Summary: Cyclometalated iridium (Ir)(iii) complexes are currently the most promising emitters for OLEDs. Two novel blue Ir(iii) complexes were designed to achieve blue emission and good electron mobility simultaneously, showing improved electroluminescence performances. This provides an effective strategy for the future molecular design of blue Ir(iii) complexes with good electron transport property for OLEDs.
DALTON TRANSACTIONS
(2021)
Article
Optics
Jun Chen, Shuang Zhao, Zhiyu Zhao, Min Liao, Shengbiao Pan, Junqin Feng, Daoyun Zhu, Wei Pang, Jiayu Lin, Zhongfei Mu
Summary: The study focuses on the luminescent properties of Bi3+-doped Sr2YNbO6 phosphors, showing that these materials can adjust luminescence color under different excitation wavelengths and possess suitable luminescent thermal stability, indicating potential application in the field of w-LEDs.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Ceramics
Yaomin Deng, Huifang Xu, Xuan Cheng, Ying Zhang, Jingyu Sun, Xiaotian Yu, Shuochen Bao
Summary: Polymer-derived greenish-yellow emitting silicon (oxy)nitride phosphors were prepared with specific raw materials, leading to controlled and enhanced emission spectra. The Ca-containing Eu-activated silicon (oxy)nitride sample demonstrated stronger luminescence under blue light excitation, showing potential for application in white light emitting diode devices.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Weihong Yuan, Ran Pang, Shangwei Wang, Tao Tan, Jiangyue Su, Xuexia Chen, Ruize Liu, Chengyu Li, Su Zhang, Hongjie Zhang
Summary: We have developed a series of green-emitting persistent luminescence (PersL) phosphors BaY2Al2Ga2SiO12:Ce3+,Bi3+ (BYAGSO:Ce3+,Bi3+) via a defect engineering approach, which can be efficiently activated by blue-light and effectively reduce flicker in AC-LEDs. By investigating the trapping levels related to Bi3+ in BYAGSO:Ce3+,Bi3+ and fabricating an AC-LED device with low flicker, we demonstrate that the BYAGSO:Ce3+,Bi3+ phosphor is a promising candidate for low-flicker AC-LEDs.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Electrical & Electronic
Tripti Richhariya, Nameeta Brahme, D. P. Bisen, Yugbodh Patle, Ekta Chandrawanshi, Nikeeta Shah
Summary: Ce3+-doped Ca2Al2SiO7 and Sr2Al2SiO7 phosphors were prepared and their Fracto-mechanoluminescence (ML) and Photoluminescence (PL) properties were analyzed. The PL studies showed emission of intense blue light under near-UV excitation, with two peaks attributed to Ce3+ ion transitions. The calculated energy difference between these peaks matched the theoretical value, and the color purity of the prepared phosphors was superior to a commercial phosphor.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Xinzhe Zhou, Xiuxiu Feng, Jian Yin, Xiurong Zhang, Panlai Li, Huanrong Li
Summary: A highly efficient blue-emitting phosphor with superior thermal stability was successfully synthesized by heating Eu3+-doped Faujasite Y zeolite under a reducing atmosphere. The intensity and peak value of the phosphor were highly dependent on the calcination temperature and reached a maximum at 1100 degrees C. Under 360 nm excitation, the phosphor exhibited a high quantum efficiency (90%) and thermal stability (the emission intensity at 423 K was about 125% of that at room temperature). White light-emitting diodes (WLEDs) fabricated using this blue phosphor, a yellow Eu2+-SOD phosphor, and a commercially available red Sr2Si5N8:Eu2+ phosphor showed excellent optical performance with a correlated color temperature of 4359 K and a color rendering index of 97. This work provides a new strategy for the synthesis of phosphors with high thermal stability and luminous efficiency.
INORGANIC CHEMISTRY
(2023)
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)