Article
Materials Science, Multidisciplinary
S. K. Jakka, M. J. Soares, M. P. F. Grata, A. J. Neves, P. C. Nagajyothi, K. Pavani
Summary: This paper investigates the optical properties and potential of YOF:Ho3+/Yb3+ phosphor nanoparticles synthesized by the Pechini sol-gel method as thermal sensors. The results show that visible UC emission can be achieved using 980 nm excitation, and luminescence in the NIR region is also observed. By calculating the fluorescence intensity ratio based on thermally non-coupled levels, a thermal sensitivity of 0.32 at 300 K is obtained for the YOF material.
Article
Chemistry, Inorganic & Nuclear
Shihao Wu, Heng Liang, Yan Li, Wanfang Zou, Zhijian Liao, Wei Wang, Xinyu Ye
Summary: In this paper, a novel Y2Mg2Ga2-xSi2O12:xCr(3+) (YMGS:xCr(3+), x = 0.005-0.08) phosphor was developed, which exhibited broadband emission from 650 nm to 1000 nm under 440 nm excitation. The phosphor showed a peak wavelength at 790 nm and a wide full width at half-maximum (FWHM) of up to 180 nm, making it suitable for NIR spectroscopic technology. The NIR pc-LED device, combining the YMGS:0.04Cr(3+) phosphor with a commercial blue chip, achieved a near-infrared output power of 14 mW and a photoelectric conversion efficiency of 5% at a drive current of 100 mA.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Jinmeng Xiang, Jiming Zheng, Xiaoqi Zhao, Xue Zhou, Changheng Chen, Minkun Jin, Chongfeng Guo
Summary: The near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have promising applications in fields such as non-destructive detection, bio-imaging and modern agriculture. This study successfully synthesized a broadband NIR-emitting phosphor CZGO: Cr3+, and improved its performance by introducing Yb3+. The fabricated NIR pc-LED device showed satisfactory performance in night vision and bio-imaging.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Environmental Sciences
Tran Le Luu, Pham Thi Kim Ngan
Summary: Textile wastewater containing harmful organic compounds and colors can affect aquatic life and human health. This study aims to fabricate Ti/SnO2-Nb2O5 electrodes for the treatment of textile wastewater. The Ti/SnO2-Nb2O5 electrode with a mole ratio of 3:7 showed the best performance with a longest service life of 39 hours in textile wastewater treatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Inorganic & Nuclear
Yi Zhang, Zhexuan Gao, Yingguang Li, Shuyang Chen, Mingxiao Han, Jie Li, Qihao Zhang, Yang Shen, Degang Deng, Shiqing Xu
Summary: The La2LiSbO6: xCr3+ phosphors were synthesized and the optimized doping concentration of Cr3+ was determined to be 0.01. The phosphor exhibits a wide emission band under 517 nm excitation, making it promising for night vision applications.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Gabriella Garbarino, Giovanni Pampararo, Elisabetta Finocchio, Guido Busca, Antonella Gervasini, Sebastiano Campisi, Brigida Silvestri, Claudio Imparato, Antonio Aronne
Summary: Amorphous catalytic materials belonging to the Nb2O5-P2O5-SiO2 system were prepared through a sustainable sol-gel procedure, exhibiting strong acidity and good selectivity in ethanol conversion but with the generation of by-products at high temperature and conversion.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Biochemical Research Methods
Julio Tadashi Tanaka, Susane Bonamin Moscardini, Willian Euripedes do Nascimento Melo, Helena Brunckova, Eduardo Jose Nassar, Lucas Alonso Rocha
Summary: The research discusses the factors influencing the emergence of a single YVO4 tetragonal phase and the optimal Nd3+ concentration for improving the infrared emission properties of YVO4:Nd phosphors. Results showed that a V5+/Y3+ molar ratio of 1.48 was the best composition to avoid undesired phases, while a sample containing 3.0% Nd3+ and annealed at 1000 degrees C exhibited the best infrared emission properties.
JOURNAL OF FLUORESCENCE
(2021)
Article
Optics
Artem D. Sinelnik, Mikhail Rybin, Dmitry S. Gets, Soslan A. Khubezhov, Lev E. Zelenkov, Sergey Makarov, Ivan I. Shishkin
Summary: Carbon dots (CDs) are a promising type of fluorescent materials with excellent properties. Laser-assisted synthesis allows the production of near-infrared emitting CDs.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
S. Kotresh, Aashish S. Roy, Adhigan Murali, Ameena Parveen, N. Anilkumar, H. G. Rajprakash, Nacer Badi
Summary: We investigated the AC electrical response of MgFe2O4-Nb2O5 nanocomposite and synthesized the nanocomposite using a simple combustion method. The structural characterization of the nanocomposites was performed using FTIR, XRD, SEM, and EDX methods. The results showed that doping Nb2O5 can enhance the AC conductivity of MgFe2O4-Nb2O5 nanocomposite. The polarization mechanism of conductivity was explained by permittivity and impedance spectroscopy.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Xiaoyu Sun, Kai Hu, Jielei Tu, Ketong Chen
Summary: This study utilizes the widespread use and antireflective properties of double-layer ARC coatings to achieve a maximum transmittance of 97.6% and super-hydrophobic properties through parameter optimization and structure adjustments. This opens up new possibilities for the application of large outdoor solar photovoltaic power plants.
SURFACES AND INTERFACES
(2021)
Article
Optics
Wenwen Chen, Zhengang Dong, Haisheng Chen, Jiaying Shen, Xiaona Du, Feng Dong, Tianhong Zhou, Wen Huang, Zhenping Wu, Weiwei Liu, Yang Zhang
Summary: This paper describes an experimental investigation of photon upconversion (UC) in perovskite BaTiO3/SrTiO3 superlattices doped with different lanthanide compositions. The results demonstrate that UC emission can be effectively enhanced by precisely incorporating a set of lanthanide ions into separated layers. Furthermore, controlled energy migration can lead to CC emission.
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, Physical
M. Chaika, R. Tomala, W. Strek
Summary: The laser-induced broadband emission of (YbxY1-x)(3)Al5O12 nanocrystals was investigated in vacuum using focused infrared laser beam. Different shapes of emission spectra were observed, with intensity decreasing over time but the shape remaining consistent, and broadband emission appearing within a certain time threshold before disappearing. These characteristics were described within the framework of the intervalence charge transfer (IVCT) model for RE doped phosphors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Bo-Mei Liu, Xiao-Xuan Guo, Lin Huang, Rong-Fu Zhou, Rui Zou, Chong-Geng Ma, Jing Wang
Summary: A multicenter strategy is developed for the preparation of blue-light-excitable Mg2SnO4:Cr3+,Ni2+ phosphors with NIR dual-emission. A ratiometric measurement system with a self-calibration function is established for highly precise and nondestructive detection of water/ethanol mixtures in the field of NIR spectroscopy applications. Additionally, a super-broadband pc-LED with a NIR output power of 16.1mW@300 mA is fabricated, demonstrating its applications in high-penetration imaging and anticounterfeiting.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Optics
Hao Suo, Yu Wang, Xiaoqi Zhao, Xin Zhang, Leipeng Li, Kuiwen Guan, Wenge Ding, Panlai Li, Zhijun Wang, Feng Wang
Summary: This study reports a novel double-perovskite phosphor La2MgHfO6:Cr3+/Yb3+ that exhibits ultra-broadband NIR emissions and remarkable luminescence properties. By controlling energy transfer process, the quantum efficiency and thermal stability of emissions are substantially improved. The phosphors are further integrated into a miniaturized NIR LED package, demonstrating superior performance.
LASER & PHOTONICS REVIEWS
(2022)
Article
Green & Sustainable Science & Technology
Ariane V. S. Cebrian, Rafael S. Carvalho, Arthur R. J. Barreto, Fernando E. Maturi, Hernane S. Barud, Robson R. Silva, Cristiano Legnani, Marco Cremona, Sidney J. L. Ribeiro
Summary: A new method for preparing transparent BC membranes as substrates for OLEDs has been developed in this study, combining sustainable techniques with recycled petrochemical plastics and naturally occurring biopolymers. The resulting membranes exhibit lower roughness and the fabricated OLEDs show good current efficiency and power density.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Lais R. Lima, Gabriela Conte, Larissa R. Brandao, Rafael M. Sabio, Alan S. de Menezes, Flavia Aparecida Resende, Jose M. A. Caiut, Sidney J. L. Ribeiro, Caio G. Otoni, Ana C. S. Alcantara, Hernane da S. Barud
Summary: Bacterial cellulose nanocrystals are versatile and sustainable biomaterials with high performance. Films based on surface-modified nanocrystals show improved thermal stability and maintained noncytotoxicity. These films have potential in biomedical applications and contribute to the circular bioeconomy by upcycling industrial byproducts.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Optics
Daniel F. Luz, Rodrigo F. da Silva, Celio V. T. Maciel, Gabriela Soares, Emanuel P. Santos, Carlos Jacinto, Lauro J. Q. Maia, Bismarck C. Lima, Andre L. Moura
Summary: In recent years, an unconventional excitation method of Nd3+ ions at 1064 nm has been investigated, demonstrating a photon-avalanche-like (PA-like) mechanism that is facilitated by temperature increase. NdAl3(BO3)4 particles were used as a proof-of-concept. This mechanism enhances the absorption of excitation photons and enables light emission across a broad range of visible and near-infrared spectra. Furthermore, the PA-like mechanism has been switched on by an auxiliary beam at 808 nm for the first time, utilizing the additional heating through phonon emissions from Nd3+ relaxation pathways. These findings have potential applications in controlled heating and remote temperature sensing.
Article
Optics
Mateus Grecco Manfre, Rogeria Rocha Goncalves
Summary: The study investigated the influence of annealing temperature on the structural and luminescent properties of Nb2O5:Eu3+ and Nb2O5:Nd3+ nanostructured materials. It was found that higher annealing temperature resulted in a more ordered distribution of Eu3+ ions, while Nb2O5:Eu3+ nanoparticles annealed at intermediate temperature exhibited better luminescent performance and colloidal stability.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Amanda Maria Claro, Caroline Cassia Alves, Kelvin Sousa dos Santos, Euzane Gomes da Rocha, Marina de Lima Fontes, Gustavo Claro Monteiro, Gustavo Senra Goncalves de Carvalho, Jose Mauricio Almeida Caiut, Andrei Moroz, Sidney Jose Lima Ribeiro, Hernane S. Barud
Summary: Tissue engineering is a multidisciplinary field that aims to improve health and quality of life by restoring tissue and organ functions. Cells and scaffolds are the major components of tissue engineering, and 3D porous scaffolds are more suitable for tissue regeneration. In this study, a regenerated cellulose sponge was used as a sacrificial template to synthesize a three-dimensional porous alumina-silica scaffold.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
York E. Serge-Correales, David Neumeyer, Sajjad Ullah, Robert Mauricot, Qilin Zou, Sidney J. L. Ribeiro, Marc Verelst
Summary: In this study, oleic acid-stabilized ZnGa2O4 nanoparticles were successfully synthesized with controlled size and monodispersity. The size and persistent luminescence of the nanoparticles could be further increased using a seed mediated approach. Surface modification strategies involving poly(acrylic acid) or cysteamine in conjunction with BF4- provided long-term colloidal stability and enhanced persistent luminescence.
Article
Materials Science, Multidisciplinary
Filipe A. Couto, Kelly T. Paula, Moliria V. Santos, Sidney J. L. Ribeiro, Cleber R. Mendonca
Summary: Periodic dielectric structures have the potential to control light propagation at micro-and nanoscale efficiently with low losses. Among various techniques, femtosecond Laser-Induced Forward Transfer (fs-LIFT) is a promising method due to its simplicity and ability to process different materials while maintaining their integrity. In this work, well-ordered periodic arrays of silk fibroin (SF) microstructures were successfully printed using fs-LIFT. Finite-element simulations were performed to study their response to electromagnetic radiation in the near to mid-infrared range with consideration of the substrate. The results showed a decrease in reflectivity, which was supported by experimental results. Coating the structures with a higher index dielectric material further enhanced the decrease in reflectivity in the mid-infrared range. This study demonstrates a straightforward approach to fabricate ordered arrays of SF microstructures, which have potential applications as controllable reflectivity coatings in the near to mid-infrared range.
Review
Polymer Science
Thales Alves Faraco, Marina de Lima Fontes, Rafaella Takehara Paschoalin, Amanda Maria Claro, Isabella Salgado Goncalves, Mauricio Cavicchioli, Renan Lira de Farias, Marco Cremona, Sidney Jose Lima Ribeiro, Hernane da Silva Barud, Cristiano Legnani
Summary: With the progress of nanotechnology, organic electronics have gained momentum, especially in the production and development of electronic devices based on organic semiconductors. In recent years, there has been great interest in using organic electronics in various fields, including biomedicine. Bacterial nanocellulose (BNC) has attracted attention as an advanced material for its unique physical and mechanical properties, making it a versatile substrate for organic electronics applications. This review focuses on BNC production methods, properties, and applications, particularly in OLEDs and flexible OLEDs (FOLEDs), and discusses the future progress of BNC-based flexible substrate nanocomposites.
Article
Chemistry, Physical
Allison R. Pessoa, Jefferson A. O. Galindo, Luiz F. dos Santos, Rogeria R. Goncalves, Stefan A. Maier, Leonardo de S. Menezes, Anderson M. Amaral
Summary: Lanthanide-doped single dielectric nanoparticles are used for nanoscale temperature sensing with high resolution. However, the low number of emitters in individual nanocrystals requires higher excitation power densities, which can cause overlapping emissions and affect temperature measurements. This study demonstrates a method to separate and correct these overlapping bands, resulting in improved temperature readout accuracy and corrected thermal artifacts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Beatriz Damasio de Freitas, Bruno Seiki Domingos Onishi, Fabio Jose Caixeta, Ricardo Bortoletto-Santos, Francis Dayan Rivas Garcia, Younes Messaddeq, Sidney Jose Lima Ribeiro
Summary: In this study, an organic-inorganic hybrid (OIH) was successfully synthesized using mild conditions, based on castor oil (CO)-derived urethanesil (Ut), as well as incorporating and interacting with europium beta-diketone [Eu(tta)3(H2O)2]. The CO-based OIH-Ut films exhibited high transmittance in the visible and infrared spectrum (90%), while urethanesil showed photoluminescence (PL) with emission at 416.0 nm when excited at 319.0 nm. The results also demonstrated an increase in the intrinsic quantum yield of PL (QEuL) for [Eu(tta)3(H2O)2], from 27% for the isolated complex to 49% when incorporated into OIH-Ut.
Article
Chemistry, Physical
Fernando E. E. Maturi, Anuraag Gaddam, Carlos D. S. Brites, Joacilia M. M. Souza, Hellmut Eckert, Sidney J. L. Ribeiro, Luiis D. Carlos, Danilo Manzani
Summary: Glasses with tunable properties are versatile materials for optical technologies. To design new optical glasses, understanding the correlation between their chemical composition and physical properties is crucial. We demonstrate the feasibility of using fluoride phosphate glasses co-doped with Pr3+ and Yb3+ ions for temperature sensing. These glasses have high stability and act as luminescent thermometers without the need for recurring calibration. They exhibit competitive thermal sensitivity and uncertainty, making them promising for cost-effective and accurate temperature probes, advancing photonic technologies.
CHEMISTRY OF MATERIALS
(2023)
Article
Energy & Fuels
Marivone Gusatti, Daniel A. R. Souza, Sidney J. L. Ribeiro, Marcelo Nalin
Summary: In this study, a novel all-solid-state electrochromic device (ECD) was prepared using a cost-effective and industrially applicable spray coating technique, eliminating the use of indium tin oxide (ITO), tungsten(VI) oxide (WO3), and Li+ or any other liquid/gel electrolytes. The fabricated ECD demonstrated a reversible color change between a light-blue (off) and darkblue (on) state, with good and homogeneous contrast. The device exhibited a coloration efficiency of 174.62 cm2/C and cycle stability for at least 150 times.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mateus Grecco Manfre, Hayra do Prado Labaki, Vitor dos Santos de Souza, Rogeria R. Goncalves
Summary: In this study, Eu3+- or Nd3+-doped lanthanum niobate systems were synthesized via a sol-gel route and their structural and luminescence properties were evaluated. The Eu3+ ions predominantly occupied the C-2 symmetry sites in the LaNbO4 host lattice, while Nd3+ ions occupied distinct symmetry sites in either La3NbO7 or LaNbO4. Eu3+-doped samples have potential applications in the lighting field, while Nd3+-doped samples could be used as solid-state lasers and biomarkers.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Qing Cai, Fengrui Li, Linfeng Zhang, Huadong Wu, Kun Wu, Jia Guo
Summary: In this study, a novel AgSCN/Bi2WO6 heterojunction composite was successfully synthesized, which significantly improved the photocatalytic performance by establishing the heterojunction structure. Among them, the 50%AgSCN/Bi2WO6 composite achieved the highest photocatalytic H-2 production. The optical and electrochemical characterization results indicated that the introduction of AgSCN reduced the charge carrier recombination rate in Bi2WO6. Possible mechanisms for the excellent photocatalytic performance of the AgSCN/Bi2WO6 composite are discussed.
SOLID STATE SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
York E. Serge-Correales, Sajjad Ullah, Elias P. Ferreira-Neto, Hernan D. Rojas-Mantilla, Chanchal Hazra, Sidney J. L. Ribeiro
Summary: The study developed a smart photocatalytic system by combining upconversion particles, silver phosphate, and an oxidant, successfully enhancing the photocatalytic activity and stability of silver phosphate. The system exhibited excellent photocatalytic performance under different light conditions.
MATERIALS ADVANCES
(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)