Article
Chemistry, Multidisciplinary
Wenjing Wang, Tao Tan, Shangwei Wang, Su Zhang, Ran Pang, Da Li, Lihong Jiang, Huimin Li, Chengyu Li, Hongjie Zhang
Summary: By synthesizing a phosphor with broadband blue-cyan emission, the cyan-gap in the emission spectrum of white LEDs can be filled, resulting in improved color rendering index and suitability for healthy lighting applications.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Chuansheng Zhong, Liang Zhang, Yonghui Xu, Xiudi Wu, Shuwen Yin, Xibao Zhang, Hongpeng You
Summary: A novel highly efficient cyan emitting phosphor was synthesized, and a neighbor cation effect was used to design phosphors with good thermal stability and tunable emission. By combining the cyan phosphor with commercial phosphors, a high color rendering index wLED that fills the cyan gap was fabricated.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Applied
Mingzhang Liang, Jianfei Xu, Yaochun Qiang, Haojian Kang, Lulu Zhang, Jie Chen, Chun Liu, Xianbi Luo, Ying Li, Jingjing Zhang, Liqing Ouyang, Weixiong You, Xinyu Ye
Summary: This study presents a novel blue-light excitable cyan-emitting phosphor with excellent performance, offering great application potential in full-spectrum white LEDs.
JOURNAL OF RARE EARTHS
(2021)
Article
Optics
Lina Cao, Zhe Xu, Jingming Chan, Balaji Devakumar, Xiaoyong Huang
Summary: In this study, a high-efficiency garnet phosphor was developed for near-UV pumped full-visible-spectrum warm-white LEDs. The phosphor exhibited a wide excitation spectrum and cyan-green emission spectrum, and had good thermal stability. By incorporating this phosphor in an LED device, a low correlated color temperature and high color rendering index full-spectrum warm-white light was achieved.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Yuhe Shao, Hao Cai, Fangyi Zhao, Shengqiang Liu, Zhen Song, Quanlin Liu
Summary: An efficient and thermally stable blue-cyan phosphor, doped with Eu2+ and suitable for full-spectrum lighting, is reported. The phosphor emits light with an asymmetric spectrum peaking at 475nm, and has high internal/external quantum efficiencies and stable emission intensity at high temperatures.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Optics
Feng Du, Zuobin Tang, Qianqian Zhao, Longsheng Du, Wenqi Xia
Summary: Efficient cyan phosphors, such as Ba5GeO4Br6: Bi3+, have been successfully prepared to address the cyan gap issue in the spectrum of white light-emitting diodes (WLEDs). The crystal structure, luminescent properties, and thermal quenching behavior of Ba5GeO4Br6: Bi3+ were studied, along with the valence state of Bi ions in the phosphor determined by XPS spectroscopy. Ba5GeO4Br6: Bi3+ showed strong absorption in the 250-400 nm range, resulting in a bright and broad cyan emission when excited by UV light. Furthermore, a full-spectrum WLED lamp with a high color rendering index (CRI) of 93.4 was achieved by coating Ba5GeO4Br6: Bi3+ phosphor, along with commercial BaMgAl10O17:Eu2+ and (Ca,Sr)AlSiN3:Eu2+ phosphors, on a 310 nm UV LED chip.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Multidisciplinary
Tonglu Sun, Danyang Liu, Yan-Gai Liu, Xiaoya Bu, Haojun Yu, Juyu Yang, Ci-An Xie, Jian Chen
Summary: Phosphors are crucial for white light-emitting diodes (WLEDs), and silicate-based phosphors have been focused on due to their varied crystal structures and high chemical stability. In this study, a novel cyan-emitting phosphor Ba2La8(SiO4)(6)O-2:Eu2+ was synthesized and its optical properties were investigated. The results indicate that Ba2La8(SiO4)(6)O-2:Eu2+ phosphors have great potential in full-spectrum WLEDs application.
Article
Optics
Jun Wang, Tianchun Lang, Mingsheng Cai, Xiaolong Jing, Lingling Peng, Qinping Qiang, Nikolaevich Yakovlev, Tao Han, Bitao Liu
Summary: In this study, a series of Sr2-xNaxSi1-xNbxO4:Eu2+ (x = 0-0.25) (SNSNO:Eu2+) solid solution phosphors were prepared to fill the cyan gap in order to achieve high-quality full-spectrum white lighting. The cosubstitution of Na+-Nb5+ ion pair improved the cyan sub-band emission and the spectrum of SNSNO:Eu2+ could be tuned by crystallographic site engineering. The results demonstrate the significance of SNSNO:Eu2+ phosphor in closing the cyan gap for full-spectrum white lighting.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Ceramics
Yongwang Li, Yanqun Shao, Weibin Zhang, ShanShan Ye, Jiangcong Zhou, Mengting Chen, Jianyan Ding, Quansheng Wu, Zhibiao Hu
Summary: A novel narrow-band cyan-emitting phosphor CYGO: Bi3+ was successfully synthesized, showing unique luminescent properties and potential applications in high-end lighting. The WLED device fabricated using this phosphor exhibited low correlated color temperature and high color rendering index, indicating great thermal stability and efficient performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Jingming Chan, Balaji Devakumar, Wei Li, Nan Ma, Xiaoyong Huang, Adam F. Lee
Summary: This study developed a novel green-emitting CaY2HfAl4O12:2%Ce3+ garnet-type phosphor through the co-substitution of Ca2 +-Hf4+ ion-pairs into a Y3Al5O12:Ce3+ phosphor, which exhibited high efficiency and excellent thermal stability under blue light excitation. Incorporating this green phosphor into LED devices enabled full-spectrum lighting with high CRI and low color temperature characteristics.
APPLIED MATERIALS TODAY
(2022)
Article
Materials Science, Multidisciplinary
Jun Sun, Wei Zhu, Bei Zhang, Feifei Huang, Limin Hu, Hongping Ma, Renguang Ye, Youjie Hua, Shiqing Xu
Summary: This paper studies a method of achieving spectral conversion in phosphors by doping Eu2+ ions. By controlling the concentration of Eu2+ ions in Rb2KNa(Li3SiO4)(4) phosphors, the emission spectrum of dual-peak emission in green and cyan can be achieved. The obtained phosphors demonstrate excellent thermal stability and show significant application value in w-LED devices.
Article
Chemistry, Inorganic & Nuclear
Sunggeun Shim, Woon Bae Park, Minseuk Kim, Jin-Woong Lee, Satendra Pal Singh, Kee-Sun Sohn
Summary: The novel KGaS2 phosphor host fills the cyan gap in phosphor-converted white light-emitting diodes (pc-wLEDs) with optimized composition and excellent photoluminescence properties. It performs much better under near-UV excitation compared to blue excitation, making it suitable for pc-wLED applications.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Lili Liu, Lei Chen, Ruixiang Wang, Yanfei Xiao, Fengli Yang, Jiaqing Peng, Fu Du, Xinyu Ye
Summary: The study achieved the successful development of cyan Ba2.85Si5.65Al0.35O12.35N1.65:0.15Eu(2+) phosphor with emission peak shifted from 512 nm to 495 nm, and emission intensity 36% higher than other phosphors. The main mechanism of spectral blue shift involves the decrease in crystal field splitting and centroid shift of the 5d level.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Yi Zeng, Fan Guo, Guang-Hui Rao, Jing-Tai Zhao, Zhi-Jun Zhang
Summary: In this study, a high color rendering PiGF (Phosphor-in-glass film) was successfully prepared at a low sintering temperature. The effect of sintering temperature, glass and phosphor mass ratio, and different fluorescent layers on the luminescence properties of PiGF were systematically investigated. By adding cyan phosphor (BaSi2O2N2:Eu2+), the cyan cavity was significantly reduced. PiGF exhibited the highest luminous efficiency of 94.55 lm/W under 455 nm blue light laser excitation, and a white light composite PiGF with a correlated color temperature of 5500 K and a color rendering index of 95 was achieved. This work demonstrates the great potential application of PiGF in white light laser lighting.
CERAMICS INTERNATIONAL
(2023)
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
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)