Article
Chemistry, Physical
Pu Fan, Zefeng Xu, Qi Luo, Zongjie He, Yuhui Chen, Qiqi Miao, Cong Huang, Xiaoguang Liu, Ling Li
Summary: Phosphor-converted white LEDs were successfully fabricated by designing a broadband yellow phosphor material Ba2CaB2Si4O14:Eu2+, which displayed a wide emission band. The fabricated WLED devices showed a correlated color temperature and chromaticity coordinates of 5522 K and (0.3293, 0.3036) respectively, indicating great potential.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Plant Sciences
Vanessa Harbart, Katja Frede, Maria Fitzner, Susanne Baldermann
Summary: With the increasing world population and limited land, there is a need for higher productivity and nutritional value of food crops. This study investigates the regulation of carotenoid and flavonoid metabolisms in lettuce and highlights the importance of environmental conditions in optimizing crop quality.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Chemistry, Analytical
Mocharla Purna Durga Parimala, M. C. Rao, K. Suresh, Ch Vijay Anil Dai, K. V. R. Murthy, Vikas Dubey
Summary: This paper presents new aspects of Sm3+-doped pure Li2CaSiO4 as a suitable candidate for white light emitting diode (WLED) applications. The samples were prepared using a modified solid-state synthesis technique and characterized using X-ray diffraction and scanning electron microscopy. Photoluminescence analysis showed that the doped samples emitted intense blue, green, and red emissions, with the strongest red emission peak at 605 nm under 408 nm excitation. The study suggests that the prepared phosphor may be useful for optical devices, especially WLEDs, and the chromaticity coordinates support its application in near-UV-blue excited WLEDs.
Article
Materials Science, Multidisciplinary
Yuntao Yu, Kai Li, Zhenzhen Zhu, Shenchuang Wang, Chunmiao Xia, Honge Wu
Summary: An excellent red-emitting La4Ti9O24:Eu3+ phosphor was successfully produced using eco-friendly hydrothermal and heat treatment techniques, eliminating the need for high-temperature and multiple-sintering processes. The phosphor can be excited by multiwavelength light and exhibits characteristic emission peaks at 592, 616, and 709 nm. Its decay time at 616 nm is calculated to be 3.32 ms. The red-emitting phosphor can be used to fabricate a red light-emitting diode, providing a viable source of healthy illumination for display and lighting by eliminating the harmful effects of blue light on human eyes.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Zhengqiang Liu, Zebin Li, Takatoshi Seto, Yuhua Wang
Summary: By adopting ion substitution engineering, an ultra-broadband yellow-emitting phosphor excited by near-ultraviolet (NUV) was successfully obtained. The white light-emitting diode (WLED) device fabricated with this yellow phosphor exhibits super-high color rendering index and appropriate correlated color temperature, indicating its great potential for application in NUV-excited white LEDs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Huifang Yang, Panlai Li, Zejun Ye, Xiaoxue Huo, Yu Wang, Qian Wu, Zhijun Wang
Summary: A novel yellow-emitting phosphor was synthesized and used to fabricate white LEDs with high color rendering index and low correlated color temperature.
DALTON TRANSACTIONS
(2022)
Article
Optics
Xin Ding, Yuanyuan Mu
Summary: A Ce3+ doped borate mineral phosphor was successfully prepared by high thermal solid state reaction, with its crystal structure and energy band properties studied in detail and applied in generating warm white light in white-LEDs.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Multidisciplinary
Xinzhe Zhou, Tiezhen Ren, Jian Yin, Xiurong Zhang, Peng Li, Huanrong Li
Summary: This study successfully developed a broadband yellow phosphor with excellent thermal stability by heating a europium-doped SOD zeolite under a reducing atmosphere. The phosphor exhibited a broad emission band and high thermal stability under UV excitation. Prototype white LEDs using this phosphor, along with other phosphors, demonstrated excellent color quality and low correlated color temperature, outperforming most tricolor NUV-LEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Optics
Sichun Li, Jiang Guo, Wen Shi, Xiaopeng Hu, Shanshan Chen, Junmeng Luo, Yuxin Li, Jiayun Kong, Junzhi Che, Haiqiang Wang, Bin Deng, Ruijin Yu
Summary: LaNb2VO9:Dy3+ yellow phosphors were successfully synthesized by high-temperature solid-state method, with detailed studies on their luminescent properties, structure, and color purity. LaNb2VO9:0.1Dy3+ phosphors exhibit strong yellow light emission under excitation, and can effectively visualize latent fingerprints and lip prints. The research demonstrates the potential application of LaNb2VO9:Dy3+ phosphors in forensic detection.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Jialin Dang, Zhi Yang, Wei Guo, Yongqiang Ji, Hui Wang, Jianping Deng, Minqiang Wang
Summary: In this study, a flexible large-area 2D metal halide perovskite-phosphor film was fabricated using a novel method, which exhibited yellow light emission under UV LED excitation and passed harsh environment tests.
ADVANCED MATERIALS INTERFACES
(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)