Article
Chemistry, Multidisciplinary
Zhipeng Wang, Zhijun Wang, Yuebin Li, Jinjin Liu, Qi Bao, Xiangyu Meng, Keliang Qiu, Zhiping Yang, Dawei Wang, Panlai Li
Summary: This study improved the composition of the phosphor to enhance the red component while increasing the spectral intensity and quantum efficiency, and also improved the thermal stability of the crystal, showing great potential for application in white LEDs.
Article
Chemistry, Applied
Shanshan Hu, Chenzhang Gu, Shuang Lu, Ying Hong, Qi Wu, Mengmeng Fu, Puxian Xiong, Yinzhen Wang
Summary: A series of UVA-emitting LaB3O6:Ce3+ phosphors and La0.96Ce0.04B3O6/PMMA films were prepared. The luminescence properties of the phosphors were studied by varying the calcining temperature, activator concentration, and PL test temperature. The composite films' transmittance and X-ray radiation capacity were also studied by varying the phosphor content. The results show that LaB3O6:Ce3+ can be used for UV phototherapy applications and La0.96Ce0.04B3O6/PMMA can be used for X-ray detection and imaging.
Article
Nanoscience & Nanotechnology
Lina Cao, Wei Li, Balaji Devakumar, Nan Ma, Xiaoyong Huang, Adam F. Lee
Summary: In this study, a new phosphor was reported for the fabrication of high-quality and full-visible-spectrum warm-white LED devices. The phosphor exhibited low color-correlated temperatures and high color rendering indexes, and it matched well with commercial blue LED chips. The combination of this phosphor with a red phosphor resulted in bright warm-white light.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Yuqi Huang, Tiange Li, Mengmeng Lei, Xianqing Huang, Tianlin Wang
Summary: In this study, a simple and reproducible method for synthesizing cerium(III)-based blue phosphor was demonstrated, which has applications in warm white-light-emitting diodes (WLEDs) and anticounterfeiting patterns. The mixture of dipicolinic acid (DPA) and Ce3+ in ethanol emitted blue fluorescence under UV induction. The quantum yield of the phosphor was improved by combining it with guanosine 5’-monophosphate (GMP). The study also integrated other ligands to construct full-color and white-light-emitting devices, and encoded anticounterfeiting patterns using lanthanide-based phosphors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Jiaojie Yang, Peihua He, Yijie Xie, Qiang Chen, Quan Dong, Wendong Nie, Fengli Yang, Wei Wang, Fu Du, Jiaqing Peng, Xinyu Ye
Summary: A brand-new blue phosphor NaSrScSi2O7: Eu2+ with high absorption efficiency and wide emission band has been successfully prepared. The phosphor exhibits excellent performance in the near-ultraviolet absorption and short-wavelength blue light emission. Packaged white light-emitting diode devices using this phosphor show lower correlated color temperature and improved color rendering index, indicating its potential prospects for applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Sanjay Kumar Baghel, Nameeta Brahme, D. P. Bisen, Yugbodh Patle, Tripti Richhariya, Ekta Chandrawanshi, Chitrkant Belodhiya
Summary: A novel Ce3+ doped SrZrSi2O7 phosphor with different doping concentration (0.05-1.5 mol %) was synthesized by conventional solid-state reaction method. The crystal structure, surface morphology, and optical properties of the phosphor were analyzed. The results showed that the optimum photoluminescence intensity was obtained when the Ce3+ doping concentration was 0.1 mol%, emitting cyan-blue light. Thermoluminescence experiments confirmed the potential application of the Ce3+ doped SZSO phosphor for UV-dosimetry.
Article
Chemistry, Analytical
V. R. Panse, D. B. Zade, Jog Milind, S. J. Dhoble, Korhan Cengiz
Summary: The excitation and emission spectra of BaSO3Cl2:Ce3+ phosphor were studied, with the emission intensity found to be related to the relative Ce3+ concentration. The prepared samples were characterized using various methods, and no additional emission band was observed in the emission spectra, indicating that the Ce3+ ion occupied a specific site in the host phosphor.
Article
Materials Science, Ceramics
Huahui Li, Runze Li, Chengkang Chang
Summary: A new Eu2+, Dy3+: Sr2B5O9Cl phosphor with long afterglow was synthesized through a solid-state reaction in a reducing atmosphere. The introduction of Eu2+ resulted in blue emission, with the Dy3+/Eu3+ co-doped sample showing better afterglow properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Zhiyu Yang, Yifei Zhao, Jumpei Ueda, Maxim S. Molokeev, Mengmeng Shang, Zhiguo Xia
Summary: In this study, a blue-light-excitable red-emitting phosphor Ce3+-doped SrLaScO4 (SLO:Ce3+) was discovered. Spectroscopy and structural analyses confirmed that Ce3+ ions competitively occupied the [LaO8] polyhedrons, generating a strong crystal field splitting and a large Stokes shift, resulting in a red emission. Furthermore, incorporating a large electronegative Ga3+ in the Sc3+ site effectively enhanced the thermal stability of SLO:Ce3+ by suppressing the thermally stimulated ionization process, thereby presenting a general design principle for discovering novel Ce3+-doped red phosphors with good thermal stability for white light-emitting diode (WLED) applications.
SCIENCE CHINA-MATERIALS
(2023)
Article
Optics
Junshan Hu, Xiaomin Bian, Ruonan Wang, Lixin Liu, Yanzhuo Li, Fengyi Wang, Hao Fu
Summary: Recent decades have seen significant developments in the research of pure upconversion red emission, which has important applications in bioimaging and anti-counterfeiting. This study achieved a single-band red upconversion emission in the new material beta-Ba2ScAlO5: Yb3+/Er3+ with the assistance of Ce3+ doping. The red to green integrated intensity ratio reached up to 430.9. The doping of Ce3+ ions enhanced the red emitting level of Er3+ while suppressing the green emission. The study investigated the upconversion luminescence mechanism and concluded that energy transfer and cross-relaxation probabilities between Er3+ and Ce3+ ions played a key role in enhancing the red emission. This work provides a valuable insight for the development of new phosphor materials with single upconversion red emission in various fields.
JOURNAL OF LUMINESCENCE
(2022)
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
Chemistry, Inorganic & Nuclear
Xiaoxi Ma, Shuo Yang, Chuqi Wang, Nana Jia, Chengyu Cai, Chuang Wang
Summary: In this study, blue to cyan color-tunable phosphors were prepared by using Ce3+ ions as sensitizer to enhance the optical performance of Eu2+ ions. The co-doped cyan phosphor-based WLED lamp showed outstanding warm white light with high light intensity and quantum efficiency.
DALTON TRANSACTIONS
(2023)
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
Jingzhou Song, Weiren Zhao, Hongshi Zhang, Yuan Liu, Hao Huang, Huanxin Yang, Hui Zhang, Jiyou Zhong
Summary: A series of dual-emitting phosphors NaMgBO3: Ce3+, Mn2+ were synthesized and characterized, demonstrating potential application in optical thermometry with excellent temperature sensitivity and resolution.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Multidisciplinary
Pratik D. Baheti, Rupesh A. Talewar, S. V. Moharil
Summary: This study investigates a phosphor converted white LED using a yellow and red emitting material. K2SiF6:Mn4+ is prepared as the red emitting phosphor using a wet chemical technique. A white LED is fabricated using a blue InGaN LED chip coated with Y3Al5O12:Ce3+ and K2SiF6:Mn4+ phosphor. The effects of K2SiF6:Mn4+ as the red emitting material in combination with the blue InGaN LED chip and Y3Al5O12:Ce3+ phosphor are also studied. The resulting white LED shows a CIE value of (x=0.31, y=0.33) and a CRI of 78.1.
Article
Materials Science, Multidisciplinary
Xuefei Miao, Chenxu Wang, Tuwei Liao, Shenghong Ju, Jiaju Zha, Wenyao Wang, Jun Liu, Yujing Zhang, Qingyong Ren, Feng Xu, Luana Caron
Summary: Magnetic refrigeration based on the magnetocaloric effect has the potential to revolutionize the refrigeration industry due to its high energy efficiency and elimination of greenhouse gas emissions. However, challenges in magnetocaloric materials such as low thermal conductivity and poor mechanical properties hinder its implementation. This paper presents a novel magnetocaloric composite with a unique microstructure that addresses these challenges. The composite exhibits high thermal conductivity and compressive strength, making it a promising solution for practical applications in magnetic refrigeration.
Article
Chemistry, Multidisciplinary
Shengqiang Liu, Yuantian Zheng, Dengfeng Peng, Jing Zhao, Zhen Song, Quanlin Liu
Summary: NIR ML materials, such as gallate spinel and gallate magnetoplumbite doped with Cr3+, have shown bright NIR ML behavior under low load and exhibit excellent tissue penetration and concealment capability. They have great potential in the fields of bio-medicine and anti-counterfeiting.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yan Wan, Jinlong Jiao, Gaoting Lin, Yan Wu, Xiaoming Wang, Ranran Zhang, Qiyang Sun, Wei Tong, Guohua Wang, Qingyong Ren, Jinfeng Zhu, Binru Zhao, Meng Zhang, Minnan Chen, Jonas Weissenrieder, Xin Yao, Jie Ma
Summary: The orbital effect on the anomalous magnetism and evolution of single crystals with low La doping has been studied. It is found that substituting Y3+ by La3+ increases the degeneracy of the yz/zx orbitals and decreases the Jahn-Teller distortion, weakening the G-type orbital ordering phase. Furthermore, the substituting decreases the magnetism entropy, indicating the shrinking of the t2g and eg orbital hybridization, destabilizing the C-type antiferromagnetic ordering phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Niu Sun, Jiawei Lin, Shihui He, Jindong Cao, Zhongnan Guo, Jing Zhao, Quanlin Liu, Wenxia Yuan
Summary: We report a novel 0D In-based OIMH (C10H22N2)2In2Br10 with intrinsic broadband emission (610 nm) and a high photoluminescence quantum yield (PLQY) of 70% without Sb doping.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Chao Dou, Shengqiang Liu, Fangyi Zhao, Zhen Song, Quanlin Liu
Summary: This study reports on how the external quantum efficiency (EQE) of Eu2+-doped Ba(K)-beta-Al2O3 blue-emitting phosphor can be significantly improved through lattice site engineering. By partially substituting K+ for Ba2+, the crystallographic site and coordination polyhedron of Eu2+ change, leading to the red shift of the excitation spectrum. The optimized blue-emitting (B0.4K1.6)(0.84)AO:Eu phosphor shows an EQE of up to 53% under violet light excitation.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Qingyong Ren, Mayanak K. Gupta, Min Jin, Jingxuan Ding, Jiangtao Wu, Zhiwei Chen, Siqi Lin, Oscar Fabelo, Jose Alberto Rodriguez-Velamazan, Maiko Kofu, Kenji Nakajima, Marcell Wolf, Fengfeng Zhu, Jianli Wang, Zhenxiang Cheng, Guohua Wang, Xin Tong, Yanzhong Pei, Olivier Delaire, Jie Ma
Summary: Superionic materials have ultralow thermal conductivity and fast ionic diffusion, making them excellent for thermoelectric converters and solid-state electrolytes. However, the correlation between these two features is unclear due to limited understanding of their atomic dynamics. In this study, we investigate ionic diffusion and lattice dynamics in Ag8SnSe6 and identify the interplay between vibrational dynamics and the host framework that enables superionicity. We also find that extreme phonon anharmonicity and weak bonding contribute to the ultralow thermal conductivity. These insights provide a fundamental understanding of atomic dynamics in superionic materials for energy conversion and storage.
Article
Chemistry, Inorganic & Nuclear
An Hou, Liubing Fan, Yan Xiong, Jiawei Lin, Kunjie Liu, Mingyue Chen, Zhongnan Guo, Jing Zhao, Quanlin Liu
Summary: Three new organic-inorganic metal halides (OIMHs) with efficient luminescent properties and broadband emission due to Sb3+ electron transitions are reported. The incorporation of Sb3+ significantly enhances the photoluminescence properties, demonstrating the potential applications of these compounds in solid-state lighting.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Na Wang, Shiqiang Hao, Yan Xiong, Mingyang Li, Kunjie Liu, Christopher Wolverton, Yonggang Wang, Jing Zhao, Quanlin Liu
Summary: The study presents a new compound (NH4)3In0.95Sb0.05Cl6 that exhibits efficient broad-band emission and good thermal stability for potential solid-state lighting applications. The material shows remarkable resistance to thermal quenching and can be used to fabricate high color rendering white light-emitting diodes.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Yongcheng Huo, Hao Cai, Yuhe Shao, Zhen Song, Quanlin Liu
Summary: In this work, Yb3+ luminescence, responsive to visible light, is achieved by utilizing energy transfer from Cr3+ in Mg2GeO4. The introduction of Yb3+ leads to intense NIR luminescence peaking at 974 nm. The preferential occupation of Yb3+ ions and the energy transfer process in Mg2GeO4 are investigated through local structure analysis. The potential application of Mg2GeO4:Cr3+, Yb3+ as thermometers is demonstrated based on the properties of thermally coupled anti-Stokes and Stokes emissions of Yb3+, and the sensitive variation of the emission intensity.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Shangqing Qu, Jinhao Chen, Jikun Chen, Guohong Cai, Yonggang Wang, Zhongnan Guo, Jing Zhao, Quanlin Liu
Summary: We report the synthesis of a quaternary selenide, In0.5Mn2Bi3.5Se8, which shows good thermal stability and has potential for thermoelectric applications. It exhibits semiconductor properties with electrical conductivity and Seebeck coefficient exceeding 3 S/cm and 300 μV/K at 810 K. This finding enriches our understanding of the pavonite homologous series and provides valuable insights for future exploration in related fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Yuhe Shao, Hao Cai, Fangyi Zhao, Zhen Song, Quanlin Liu
Summary: This study presents a new blue-violet phosphor SrSc4Si5O17:Ce3+ with a small stokes-shift, which exhibits efficient luminescence. The fabricated white light-emitting diodes show excellent color rendering index, indicating the potential of this phosphor in indoor healthy lighting and agricultural lighting applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Shen Han, Shengnan Dai, Jie Ma, Qingyong Ren, Chaoliang Hu, Ziheng Gao, Manh Duc Le, Denis Sheptyakov, Ping Miao, Shuki Torii, Takashi Kamiyama, Claudia Felser, Jiong Yang, Chenguang Fu, Tiejun Zhu
Summary: This study finds that aliovalent doping can be more effective in reducing the lattice thermal conductivity of thermoelectric semiconductors compared to isoelectronic alloying. The introduction of aliovalent dopants leads to the softening and deceleration of optical phonons, resulting in a significant reduction in thermal conductivity. Moreover, the heavy dopant can induce the avoided crossing of acoustic and optical phonon branches, further suppressing phonon propagation.
Article
Nanoscience & Nanotechnology
Xiao-Ming Huang, Ying Zhao, Hai-Le Yan, Nan Jia, Bo Yang, Zongbin Li, Yudong Zhang, Claude Esling, Xiang Zhao, Qingyong Ren, Xin Tong, Liang Zuo
Summary: This work adopts a microstructure design strategy to improve the mechanical properties and elastocaloric effect (eCE) performance of ferromagnetic shape memory alloys. By introducing strong texture and ductile interfacial phase, the discontinuity of strain near the grain boundary is reduced and grain boundary cohesion is enhanced, resulting in increased compressive strength and strain capacity. The prototype Ni54Fe19Ga27 alloy achieved a compressive strength exceeding 1.5 GPa and strain capacity exceeding 30.0% at room temperature, along with a wide working temperature window of 120 K and superior eCE fatigue life. This study is expected to provide an effective strategy to enhance the eCE performance of ferromagnetic shape memory alloys.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Jingxuan Du, Shengqiang Liu, Zhen Song, Quanlin Liu
Summary: This study successfully substituted the toxic solvent system with a commonly used one to synthesize small-sized K2SiF6:Mn4+ phosphor. Surface passivation was performed to enhance luminescence intensity and resistance to moisture. The K2SiF6:Mn4+@CaF2 phosphor showed high luminescence efficiency and maintained good luminescence performance under high humidity and temperature conditions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Fangyi Zhao, Yuhe Shao, Zhen Song, Quanlin Liu
Summary: This study utilizes the structural confinement effect to selectively control energy transfer pathways, suppress luminescence concentration and thermal quenching, and enhance the luminescence intensity. By controlling the distances between doped ions, the energy can migrate more quickly from the quenching center to the thermally stable center, improving the thermal stability of the phosphor. This research provides a strategy for enhancing near-infrared luminescence and demonstrates the potential applications of the phosphors in night vision and optical thermometry fields.
INORGANIC CHEMISTRY FRONTIERS
(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)
