Article
Materials Science, Multidisciplinary
Woo Sug Yoon, Ho Sug Lee, Kiin Choi, Tai Kyu Lee
Summary: A visible light responsive TiO2 photocatalyst was prepared and tested for degradation of trichloroethylene using FTIR spectroscopy. In-situ FTIR analysis was found to be a useful tool for evaluating photocatalytic performance, suggesting the potential proposal of a new ISO standard for photocatalysis testing method with FTIR analysis.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Dawei Wen, Hongmin Liu, Zhe Ma, Lei Zhou, Junhao Li, Yue Guo, Qingguang Zeng, Peter A. Tanner, Mingmei Wu
Summary: This study presents the synthesis and properties of yellow-orange-red emitting SrAl2Si3ON6:Eu2+ oxynitride phosphors with high thermal and chemical stability. The oxynitride phosphors were synthesized from the nitride iso-structure by introducing oxygen, enabling facile synthesis using air-stable raw materials. The phosphors exhibited excellent thermal and chemical stability, with no decrease in emission intensity even after exposure to high temperatures and water immersion.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Electrical & Electronic
Shuai He, Liangliang Zhang, Xueqing Liu, Dashuai Sun, Hao Wu, Huajun Wu, Guohui Pan, Zhendong Hao, Jiahua Zhang
Summary: Efficient cyan BaSi2O2N2:Eu2+ phosphor emission was enhanced by adding Ho3+ to promote conversion from Eu3+ to Eu2+. Full-color WLEDs with high color rendering were achieved by packaging commercial yellow and red phosphors, with ultra-high color rendering index (CRI = 98) and high luminous efficiency (95 lm/W) at a correlated color temperature of 5112 K.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yifei Liu, Yifeng Liu, Meihua Wu, Can He, Qiyun Liu, Ximing Huang, Xin Min, Zhaohui Huang, Hui Wang, Ruiyu Mi
Summary: A novel blue-emitting phosphor, MgAl2Si4O6N4:Eu2+, was successfully synthesized with changing emission band properties under increasing Eu2+ concentration. The prepared phosphor showed excellent emission characteristics in white LED devices.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Ceramics
Yanan Li, Shujie Gai, Hui Zhu, Jian Yin, Wenyuan Guo, Maxim S. Molokeev, Xiangyang Lu, Mao Xia, Zhi Zhou
Summary: In this study, the strategy of replacing Ge4+ with smaller Si4+ was adopted to selectively occupy the site of Bi3+ activator in the small ring and achieve near-infrared light-emitting in Zn-2(Ge,Si)O-4. The designed phosphor exhibited a broad near-infrared emission range from blue to NIR by controlling the crystal field engineering. This work provides new insights for the development of Bi3+-activated near-infrared emitting phosphors and sheds light on the potential near-infrared luminous mechanism of Bi3+.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Xiangming Yue, Ju Xu, Hang Lin, Shisheng Lin, Renfu Li, Bo Wang, Qiugui Huang, Pengfei Wang, Ping Sui, Yao Cheng, Yuansheng Wang
Summary: The study incorporates beta-SiAlON:Eu2+ with admirable luminescent feature into a robust silicate glass matrix, successfully maintaining green-emissive performance and alleviating luminescence droop. Optimization of composite material leads to high quantum efficiency, thermal conductivity, and saturation threshold, demonstrating efficient laser-driven color conversion for projection displays with high brightness, low etendue, and wide color gamut.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Physical
S. Mahlik, J. Barzowska, K. Szczodrowski, N. Majewska, M. Grinberg, D. Michalik, B. J. Adamczyk, T. Pawlik, T. Rzychon, A. Adamczyk, M. Sopicka-Lizer
Summary: In this study, phosphor powders with the composition of Sr0.98Eu0.02Si2O(5-1.5x)Nx were successfully synthesized, and the effects of N3- and O2- ions on the structural and photoluminescent properties were investigated by varying the nitrogen content. The specimen with a bi-phase composition exhibited the highest quantum yield at 540 nm, related to Eu2+ in the triclinic phase SrSi2O2N2. Low quantum yield in single triclinic phase materials was attributed to absorption of excitation light by defects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Limin Fang, Liangliang Zhang, Hao Wu, Huajun Wu, Guohui Pan, Zhendong Hao, Feng Liu, Jiahua Zhang
Summary: Broadband NIR pc-LEDs are crucial for integrating NIR spectrometers into mobile devices for rapid and noninvasive detection of biological components. However, efficient broadband NIR phosphors with a peak emission wavelength longer than 800 nm are lacking. In this study, a CaMgGe2O6:Cr3+ phosphor was prepared and used to fabricate a high-performance broadband NIR pc-LED, achieving the highest reported photoelectric efficiency and NIR output power for pc-LEDs with a peak wavelength longer than 800 nm. The results demonstrate the considerable potential of CaMgGe2O6:Cr3+ phosphor in NIR spectroscopic applications.
INORGANIC CHEMISTRY
(2022)
Article
Optics
Jianyan Ding, Shuijing Huang, Hongling Zheng, Liting Huang, Peiru Zeng, Shanshan Ye, Quansheng Wu, Jiangcong Zhou
Summary: A novel cyan light-emitting oxynitride based phosphor, Y10Si3Al2O18N4: Ce3+, with promising luminescence properties and thermal stability was successfully synthesized for the application in full-visible-spectrum lighting. The study also investigated the energy transferring between multiple luminescent centers and the spectral characteristics of phosphors in detail.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Yu Xiao, Wenge Xiao, Dan Wu, Linquan Guan, Min Luo, Ling-Dong Sun
Summary: The study has successfully designed an extra-broadband VIS-NIR emitting phosphor capable of emitting light from 460nm to 880nm upon 450nm excitation, with efficient energy transfer and potential applications in multifunctional LED devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Shruti Hariyani, Jakoah Brgoch
Summary: In the race to develop new luminescent materials, color theory and human perception should be principal factors guiding materials design; antiquated colorimetrics are still widely applied in the literature despite shortcomings; contemporary ideas in color theory are needed to accurately describe the color quality of modern LED light bulbs and flat-panel displays.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
I. Elhamdi, F. Mselmi, S. Kammoun, E. Dhahri, A. J. Carvalho, P. Tavares, B. F. O. Costa
Summary: ZnAl2-xCrxO4 (x = 0 and 0.05) samples were synthesized and investigated for their structure, photoluminescence properties, EPR measurements, thermal stability, and chromaticity diagram. It was found that ZnAl1.95Cr0.05O4 is a potential far-red phosphor for plant growth applications.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Qi Wang, Shangwei Wang, Tao Tan, Jiutian Wang, Ran Pang, Da Li, Chengyu Li, Hongjie Zhang
Summary: In this study, a novel efficient broadband NIR phosphor was designed and synthesized for NIR pc-LED applications. It demonstrated high photoelectric conversion efficiency and excellent fluorescence emission performance, making it suitable for night vision applications.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Multidisciplinary Sciences
Jonathan Trisno, Darren C. J. Neo, Maxine M. X. Ong, Ray J. H. Ng, Christina Y. L. Tan, Isabelle S. H. Lee, Hong Son Chu, Ee Jin Teo
Summary: This study introduces a new method to improve the efficiency of green LEDs and finds that the wall-plug efficiency of the enhanced green LED can reach 48% compared to 38% for a solid-state green LED. By retrofitting existing white LEDs and tuning the spectral output, a significant improvement in plant growth of up to 39% can be achieved.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Ye Jin, Zhen Zhou, Rongxia Ran, Shuang Tan, Yongfu Liu, Jinju Zheng, Guotao Xiang, Li Ma, Xiao-jun Wang
Summary: Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have promising applications in various fields. A novel NIR phosphor Ca2LuScAl2Si2O12:Cr3+ (CLSAS:Cr3+) is reported, which exhibits broadband emission and high internal quantum efficiency. It is used to fabricate NIR pc-LEDs for fast imaging of veins in human palm and fist, as well as night vision for objects.
ADVANCED OPTICAL MATERIALS
(2022)
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)