Article
Chemistry, Physical
Guna Doke, Andris Antuzevics, Guna Krieke, Aija Kalnina, Anatolijs Sarakovskis
Summary: In this study, the broadband near-infrared persistent luminescence of a novel MgGeO3: Cr3+ material is reported. The luminescence can be excited by ultraviolet radiation and detected for more than 16 hours. The interaction between Cr3+ luminescence centers, oxygen-impurity complexes, and oxygen vacancy related trapping states is suggested as the cause of the observed bands. The study also reveals that athermal tunnelling directly to the luminescence centers is the main detrapping route for the trapped charge carriers in the MgGeO3: Cr3+ material. This research contributes to a better understanding of the luminescence mechanism of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Sen Wang, Jize Cai, Ran Pang, Haiyan Wu, Yanqing Luo, Tao Tan, Weihong Yuan, Lihong Jiang, Chengyu Li, Hongjie Zhang
Summary: A series of novel non-gallate near-infrared long-persistent phosphorescence Mg2-xZnxSnO4:Cr3+ phosphors were synthesized and characterized. The optimized sample Mg1.4Zn0.6SnO4:0.005Cr(3+) showed the strongest photoluminescence intensity and all samples exhibited intense near-infrared long-persistent phosphorescence.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Ning Mao, Shengqiang Liu, Zhen Song, Yi Yu, Quanlin Liu
Summary: The study successfully synthesized a garnet-type NIR phosphor with weak crystal field strength and excellent luminescent properties, providing a good choice of phosphor for NIR LED devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Honglei Yuan, Yanzhi Bai, Gaoliang Wang, Liuyang Xu, Huanxia Jia, Xianke Sun
Summary: In this study, La3Ga5SiO14:Cr3+ phosphors with broadband near-infrared emission were successfully synthesized and their optical characteristics were investigated through various measurements. The results show that the substitution of Cr3+ ions in the La3Ga5SiO14 host leads to sharp emission bands and wide emission bands originating from different transitions of Cr3+. The fabricated NIR pc-LED device using La3Ga5SiO14:0.10Cr3+ phosphor demonstrates the potential applications of La3Ga5SiO14:Cr3+ phosphors in nondestructive examination.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Sourav Das, S. K. Sharma, J. Manam
Summary: This study synthesized Cr3+ doped Zn3Ga2Ge2O10 long persistent phosphor materials and investigated their crystal structure, band gap, photoluminescence excitation bands and emission wavelength. The experimental results indicate that the material is suitable for night vision devices and military tagging and tracking purposes.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Li You, Rundong Tian, Tianliang Zhou, Rong-Jun Xie
Summary: The research shows that the site engineering can achieve unusual broadband NIR emission in BaMgAl10O17:Cr3+ (BAM:Cr3+), with emission maximum and spectral bandwidth being tailored by controlling the site occupancy of Cr3+ on different Al sites. The optimal phosphor exhibits both a sharp line spectrum and a broadband emission, with an internal quantum efficiency of around 94%. A prototype NIR light source combining a blue laser diode with BAM:Cr3+ phosphor-in-glass (PiG) demonstrates an NIR light output power of 3.4 mW when driven by a 100 mW blue laser diode.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Meng Zhao, Shengqiang Liu, Hao Cai, Fangyi Zhao, Zhen Song, Quanlin Liu
Summary: A new broadband NIR phosphor Sr2ScSbO6:Cr3+ has been developed, showing high luminescence efficiency and thermal stability for potential use in solar-like lighting applications.
SCIENCE CHINA-MATERIALS
(2022)
Article
Materials Science, Ceramics
Tianyao Liu, Hao Cai, Ning Mao, Zhen Song, Quanlin Liu
Summary: An efficient broadband near-infrared phosphor LiInGe2O6:Cr3+ with good emission performance and quantum efficiencies that match commercial LEDs was demonstrated. By using this phosphor in LED illumination, clear identification of blood vessel distribution under near-infrared camera was achieved.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Optics
Liangliang Zhang, Dandan Wang, Feng Liu, Hao Wu, Guohui Pan, Huajun Wu, Zhendong Hao, Hong Zhang, Jiahua Zhang
Summary: A novel strategy of minimizing bond angle distortion is realized to suppress thermal quenching in NIR phosphors, resulting in enhanced thermal stability. The findings provide new insights and possibilities for the exploration of thermally stable NIR phosphors.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Junqing Xiahou, Qi Zhu, Lin Zhu, Siyuan Li, Ji-Guang Li
Summary: The study synthesized phosphors with near-infrared persistent luminescent properties and found that better luminescence can be achieved under specific doping and temperature conditions, showing potential for temperature sensing applications.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Spectroscopy
Birendra Kumar Rajwar, Jairam Manam, Shailendra Kumar Sharma
Summary: In this study, the luminescence intensity and afterglow luminescence of Cr3+ doped Zn3Ga2Ge2O10 phosphor were improved by incorporating an appropriate amount of Pr3+ ions. The developed Zn3Ga(2-x-y)CrxPryGe2O10 phosphors showed strong absorbance bands at 256, 412, and 570 nm, corresponding to the transition of Cr3+ ions. The phosphors exhibited narrow luminescence at 698 nm, which was significantly enhanced by increasing the Pr3+ content up to 0.02. The phosphors also showed long persistent luminescence for more than 24 hours. Thermoluminescence measurement was conducted to understand the luminescence process and trapping parameters associated with prominent glow peaks.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Optics
Junqin Feng, Xiao Wu, Daoyun Zhu, Jun Chen, Zhongfei Mu
Summary: This paper reports a broadband emission near-infrared phosphor Ca3Lu2Ge3O12:Cr3+, which exhibits a large full width at half maximum and good temperature characteristics. The phosphor can be used in the development of pc-LED devices for the near-infrared fields.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Jiyou Zhong, Ya Zhuo, Fu Du, Hongshi Zhang, Weiren Zhao, Shihai You, Jakoah Brgoch
Summary: This study identified a new Cr3+-substituted phosphor, GaTaO4:Cr3+, with high internal quantum yield and excellent thermal stability. The new compound generates a broadband NIR emission covering the 700-1100 nm region when irradiated with blue light.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Xiaomeng Wang, Jiaren Du, Hengwei Lin
Summary: Near-infrared persistent luminescence (NIR PersL) materials have great potential in night vision, biological imaging, and information encryption. This study investigates a series of Gd3MgxGexGa5-2xO12:Cr3+ materials prepared by microwave-assisted solid-state approach and demonstrates the improvement of PersL performance through chemical composition co-substitution. The study also reveals the trap level distribution of Gd3Mg0.5Ge0.5Ga4O12:Cr3+ phosphor and suggests that bandgap reduction and trap distribution optimization facilitate NIR PersL in Cr3+-doped gadolinium gallium garnets.
Article
Chemistry, Inorganic & Nuclear
Wei Xie, Wei Jiang, Rongfu Zhou, Junhao Li, Jianhong Ding, Haiyong Ni, Qiuhong Zhang, Qiang Tang, Jian-Xin Meng, Litian Lin
Summary: Materials with NIR persistent luminescence and photostimulated luminescence properties have been developed, showing potential for applications in optical information storage and bioimaging. The materials have a unique crystal structure, with doped Cr ions in a specific valence state and coordination, contributing to the broadband luminescence observed.
INORGANIC CHEMISTRY
(2021)
Review
Chemistry, Physical
Qiang Wang, Min Liao, Qiuming Lin, Mingxiang Xiong, Zhongfei Mu, Fugen Wu
Summary: This review examines the current research status of all inorganic thermometers based on fluorescence intensity ratio (FIR) technology, categorizing and analyzing the thermometers in detail, discussing performance parameters, and looking forward to the future development.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Qingtian Zhang, Kwok Sum Chan
Summary: The study introduced a new method to generate pure valley current in a three-terminal graphene junction using asymmetry in graphene nanostructures. By applying different biases to the armchair leads, a pure valley current can be obtained in the zigzag lead. The theoretical results provide a deeper understanding of pure valley current generation mechanism and may encourage further experimental studies in graphene and graphene-like materials.
Article
Nanoscience & Nanotechnology
Qiuming Lin, Qiang Wang, Min Liao, Mingxiang Xiong, Xing Feng, Xin Zhang, Huafeng Dong, Daoyun Zhu, Fugen Wu, Zhongfei Mu
Summary: This study demonstrates an NIR phosphor, ScF3:Cr3+, which has both a broad emission bandwidth and excellent luminescence thermal stability. An NIR pc-LED based on this phosphor was fabricated and showed strong broadband NIR emission.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Junqin Feng, Shuwen Yuan, Xiao Wu, Daoyun Zhu, Jun Chen, Zhongfei Mu
Summary: The Ce3+/Dy3+ co-doped KCaLa(PO4)(2) phosphors exhibit excellent thermal stability and high energy transfer efficiency, making them a promising candidate for white LED applications.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Xing Xie, Minru Wen, Zhenyang Chen, Huafeng Dong, Xin Zhang, Fugen Wu, Zhongfei Mu
Summary: The study predicts three new lowest-enthalpy structures for ZrN2 and HfN2 systems using the evolutionary algorithm method and first-principles calculations, analyzes their dynamic stability and mechanical properties, and investigates the behavior of the N-N bond under high pressure. Moreover, the differences in structural richness among TiN2, ZrN2, and HfN2 are studied by investigating the density of states.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Condensed Matter
Fu Li, Qingtian Zhang
Summary: This study investigates the quantum transport properties of hybrid silicene nanoribbons in the presence of a spatially alternative electric field. It is found that valley resolved inner-edge states can be obtained, and a dissipationless transistor is successfully designed based on these states. However, the inner-edge states are not robust and can be affected by defects.
MICRO AND NANOSTRUCTURES
(2022)
Article
Optics
Shuang Zhao, Lulu Lou, Shuwen Yuan, Daoyun Zhu, Fugen Wu, Zhongfei Mu
Summary: An ultra-broad band NIR emitting phosphor Li3Sc1.92(PO4)(3):0.08Cr(3+) with a good FWHM performance has been reported. It has great potential in areas such as night vision and NIR spectroscopy.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Qingtian Zhang, Yongri Piao, Shining Ma, Yue Liu, Yongtian Wang, Weitao Song
Summary: In this study, a waveguide-type near-eye display using a pin-mirror array and a concaved reflector is proposed for improved image uniformity and stray light. Various factors such as field of view, resolution, and depth of field are discussed in detail. The experimental results demonstrate that the proposed display can extend the depth of field and enhance the overall image quality.
Article
Multidisciplinary Sciences
Fu Li, Qingtian Zhang, Kwok Sum Chan
Summary: We report a theoretical study on the electronic transport properties of alpha-T-3 lattice nanoribbons in the presence of uniform electric and magnetic fields. We obtained unexpected Landau levels and observed unique flat bands due to the crossed electric and magnetic fields. By considering a double constriction structure of alpha-T-3 lattice, we investigated the quantum transport in the flat band and obtained novel quantum transport properties that showed significant differences from conventional Dirac electrons.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Junheng Ou, Qingtian Zhang
Summary: We investigated spin-dependent thermoelectric transport in zigzag phosphorene nanoribbons with a ferromagnetic stripe. We explored the possibility to enhance the spin thermopower via modifications of the edge states in zigzag ribbons. Two methods are proposed to modulate the edge transport: one is applying gate voltages on the edges; the other is including notches on the ribbon edges. The transport gap is enlarged by the edge-state modifications, which enhance the charge and spin Seebeck coefficients almost twofold.
Article
Physics, Applied
Lekang Wang, Lingling Guo, Qingtian Zhang
Summary: The study focused on the tunneling transport properties of topological edge states in irradiated graphene and graphene-like materials, revealing that electrons cannot transport through the device due to the band gap, but will tunnel through when anomalous topological edge states are induced by a laser.
APPLIED PHYSICS EXPRESS
(2022)
Article
Optics
Qiang Wang, Jun Wen, Jiangyun Zheng, Qiangsheng Xia, Chenlong Wei, Xiaoxiao Huang, Zhongfei Mu, Fugen Wu
Summary: This study successfully regulated the thermal enhancement effect by changing the Yb3+ concentration in the material and explored the mechanism of thermal enhancement luminescence. By establishing a dual temperature sensing model, it was confirmed that the material has high sensitivity, wide temperature sensing range, and good thermal fatigue resistance.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Qiang Wang, Shuang Zhao, Jun Wen, Xiaoxiao Huang, Chenlong Wei, Qiangsheng Xia, Zhongfei Mu, Hai Guo
Summary: Optical temperature sensing based on fluorescence intensity ratio (FIR) technology is a potential method for temperature measurement due to its fast response, non-invasive nature, and high accuracy. A multi-strategy combination method was used to study the multi-mode temperature sensing performance of optical temperature sensing materials, leading to the development of high-performance materials and the establishment of temperature sensing models. This approach opens up an effective pathway for the rapid development of inorganic optical temperature sensing materials.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Jun Wen, Jing Gao, Guisheng Jiang, Xiaoxiao Huang, Qiang Wang, Chenlong Wei, Lixin Ning, Chang-Kui Duan
Summary: Theoretical studies were conducted to investigate the thermodynamic stabilities and luminescent properties of defects and lanthanide ions in BaZrSi3O9, aiming to gain a better understanding of the luminescence mechanisms in undoped and lanthanide-doped BaZrSi3O9.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Multidisciplinary
Chenlong Wei, Qiang Wang, Zhaoshi Dong, Jun Wen
Summary: This article reviews the latest research progress and methods in improving the properties of W-Cu composites by adding a third component. It also discusses the related issues and development directions.
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)
