Article
Materials Science, Ceramics
M. Kumar, Mohinder Singh Chauhan, M. Shaheer Akhtar, Ahmad Umar
Summary: Nanostructured ZnO doped with different Ce precursor concentrations were prepared and tested for photocatalytic and chemical sensing performances. Blue-shift was detected in 5 mol% Ce doping, which was found to be the optimum concentration for achieving the maximum dye degradation and sensing performances. Facile redox couple Ce3+/Ce4+ improved charge separation, leading to increased catalytic and PA sensing performances.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Shipra Choudhary, Dilruba Hasina, Mahesh Saini, Mukesh Ranjan, Satyabrata Mohapatra
Summary: ZnFe2O4-ZnO heterojunction photocatalysts were successfully fabricated using a simple co-precipitation method, showing superior photodegradation performance and stability for large-scale photocatalytic applications. The efficient sunlight utilization ability and suppression of recombination of charge carriers contribute to the improved photocatalytic performance of the ZnFe2O4-ZnO nanostructures. (C) 2021 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Wenyang Ma, Linhua Xu, Zhen Tian, Aoxin Zang
Summary: This research prepares ZnO whiskers through reactive evaporation and alters their surface properties by ultraviolet irradiation. The experimental results reveal that numerous oxygen vacancies are generated on the surface of ZnO whiskers under UV irradiation. The presence of surface oxygen vacancies enhances the photocatalytic activity of ZnO whiskers.
JOURNAL OF LUMINESCENCE
(2022)
Article
Engineering, Electrical & Electronic
Mahendra Kumar Gora, Arvind Kumar, Sanjay Kumar, Jagdish Nehra, Banwari Lal Choudhary, Satya Narain Dolia, Rishi Kumar Singhal
Summary: In this study, Cu-doped ZnO nanoparticles were synthesized and investigated to explore the mechanism of room-temperature ferromagnetism in these dilute magnetic semiconductors. The results showed that the 2% Cu-doped sample exhibited the highest oxygen vacancies and saturation magnetization. UV spectroscopy indicated a reduced band gap upon Cu doping. Photoluminescence spectroscopy and XPS results revealed the presence of defect-related states associated with Cu doping. The induced magnetization in the Cu-doped nano-crystalline samples was proposed to be caused by the exchange interactions between Cu2+ ions and oxygen vacancies.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Applied
Maetee Kunrugsa
Summary: The carrier dynamics in GaSb/GaAs quantum-ring-with-dot structures are explored and quantitatively described using a rate equation model developed from experimental photoluminescence spectra. The model considers carrier transition rates, activation energies, and the difference in PL intensities between quantum rings and quantum dots. The calculated electronic structures of a single QRDS are used to estimate radiative transition rates, with presented numerical values for various parameters matching experimental data.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Dhritiman Banerjee, Payal Banerjee, Asit Kumar Kar
Summary: This study examines the effects of surface modification on zinc oxide nanoplates, specifically on defect state densities, optical properties, photocatalytic efficiency, and quantum efficiencies. Different polymers were used to modify the surface and XPS and PL were employed to quantify defect states. The findings show that Zn-i significantly impacts photocatalytic activity along with V-O, but to a lesser extent due to accessibility and intrinsic nature differences. Photophysical processes like FRET and CT play a significant role in determining both PCA and quantum efficiency, with surface modification leading to a drop in quantum efficiency and changes in emission color.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Jiaqi Zhang, Jin Li
Summary: In this study, ZnO/NiO composites with oxygen vacancies were prepared and the existence of phases, morphology, and oxygen vacancies in the material were effectively proven through various testing methods. The results showed that 10% Ni doped OZN-10 exhibited the best photocatalytic activity and gas sensitivity characteristics.
Article
Chemistry, Physical
Fan Wu, Chuan Pu, Minxian Zhang, Bin Liu, Jingling Yang
Summary: The bicomponent photocatalyst Ag/TB-ZnO with strong metal-support interaction demonstrated efficient charge separation and surface reaction, achieving a NO oxidation efficiency of 71.0% and excellent stability, attributed to the SMSI effect and surface plasmon resonance effect of metallic Ag.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Inorganic & Nuclear
Fenghua Xu, Zhipeng Pan, Baicheng Weng
Summary: By incorporating sulfur into nanorods, vacancies of O and S are created, significantly enhancing light absorption and charge separation/transport efficiency, leading to highly efficient photocatalytic degradation of tetracycline hydrochloride.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.
Letter
Chemistry, Multidisciplinary
Yiqiang He, Cailing Chen, Yuxin Liu, Yilin Yang, Chunguang Li, Zhan Shi, Yu Han, Shouhua Feng
Summary: This study synthesized full-spectrum responsive metallic ZnIn2S4 (VIn-rich-ZIS) material rich in indium vacancies for the first time and quantitatively studied the influence of defects on carrier dynamic parameters. It was found that the minority carrier diffusion length is closely related to the catalytic performance. Infrared spectroscopy and theoretical calculations revealed that the presence of indium vacancies lowers the energy barrier for CO2 to CO conversion.
Article
Chemistry, Multidisciplinary
Ronghua Li, Tsuyoshi Takata, Beibei Zhang, Chao Feng, Qianbao Wu, Chunhua Cui, Zemin Zhang, Kazunari Domen, Yanbo Li
Summary: In this study, efficient photocatalytic water splitting criteria were revealed using SrTiO3: Al as a model photocatalyst, showing that suppressing photocarrier recombination and establishing a facile charge separation and extraction mechanism can achieve high quantum efficiency. Even on photocatalysts with a very short intrinsic photocarrier lifetime, high quantum efficiency can be achieved by challenging the belief that a long carrier lifetime is a fundamental requirement. These findings could guide the design of more efficient solar-to-fuel conversion OWS photocatalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Materials Science, Ceramics
Vitaly Gurylev, Tsong Pyng Perng
Summary: Defects in zinc oxide (ZnO) play a crucial role in influencing its properties and applications, with potential for improved characteristics through the introduction of oxygen and zinc vacancies. Defective ZnO shows broad application potential in nanoscale devices, yet faces challenges and requires further research for in-depth exploration.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
B. B. Wang, X. X. Zhong, C. L. He, B. Zhang, U. Cvelbar, K. Ostrikov
Summary: The solvothermal synthesis method successfully controlled the morphology and structure of WO3-x nanomaterials. The study on the photoluminescence properties revealed emissions in ultraviolet, blue, green, and red, with the intensity enhancement attributed to factors like increased oxygen vacancies and nanocavity structures. These results offer a new technique for structure control and potential applications in catalysis fields, contributing to the development of next-generation nanodevices and catalytic materials.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Applied
Alireza Ranjbari, Jiyun Kim, Ju Ho Kim, Jihee Yu, Kristof Demeestere, Philippe M. Heynderickx
Summary: The effect of hydrogen reduction on commercial ZnO by introducing oxygen vacancies on the adsorption and photocatalytic degradation of methylene blue was investigated. The results showed that hydrogen reduction increased the concentration of active sites of the photocatalyst, leading to improved adsorption and photocatalytic degradation.
Article
Nanoscience & Nanotechnology
Gisung Kim, Namhee Kwon, Dongho Lee, Mijoung Kim, Moonhoe Kim, Yongjei Lee, WooJong Kim, Daseul Hyeon, Bora Kim, Mun Seok Jeong, Jinpyo Hong, JungYup Yang
Summary: Recent studies have found that copper (I) thiocyanate (CuSCN) has significant potential as a hole extraction material for perovskite solar cells. However, the use of CuSCN can lead to unwanted dissociation of MAPbI(3) to PbI2, and the solvent DES can damage the surface of the perovskite layer. By increasing the molar ratio of MAI in the MAPbI(3) precursor solution, the surface damage to MAPbI(3) can be reduced and the dissociation to PbI2 can be effectively suppressed.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jaekak Yoo, Kihyuk Yang, Byeong Wook Cho, Ki Kang Kim, Seong Chu Lim, Seung Mi Lee, Mun Seok Jeong
Summary: In this study, the phonon vibrational origin of a single sulfur-vacancy-induced Raman peak was identified as A(1)'(k) through quantum mechanical calculations. This finding is of great importance for improving the quality of transition metal dichalcogenides materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Byeong Geun Jeong, Chanwoo Lee, Sung Hyuk Kim, Seok Joon Yun, Dong Hyeon Kim, Juchan Lee, Dongki Lee, Ki Kang Kim, Seong Chu Lim, Mun Seok Jeong
Summary: Defect analysis in two-dimensional transition-metal dichalcogenides (TMDs) is important due to its significant impact on the optical and electrical properties of TMD. This study investigated the influence of sulfur vacancies and oxygen substitution on the optical properties of WS2 using laser irradiation technique. The defect-induced photoluminescence (PL) exhibited distinct features depending on the type of defects, resulting in changes in the intensities and peak positions of excitons, biexcitons, and defect-bound excitons. Defect-activated Raman modes provided information about the defects and revealed the origin of the alteration in PL.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Chang Seon Park, Changwoo Lee, Won Jun Jung, Min Park, Dong Su Lee, Hong Seok Lee, Dae-Young Jeon
Summary: This study investigates the ambient effects on multi-layer MoS2 FETs for the first time and finds that the channel thickness has a significant impact on their performance. This is important for the development and optimization of highly sensitive chemical or gas sensors, as well as for a better understanding of the operation of multi-layer MoS2 FETs.
MICROELECTRONIC ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Anh Thi Le, T. Anh Thu Do, Minh Hoa Nguyen, Manh Ha Hoang, Man Minh Tan
Summary: CdSe/CdS core-shell and gradient alloy CdSeS hetero quantum dots (HQDs) were synthesized using a wet chemical technique. Their carrier localization-influencing recombination mechanism and energy band gap structure were carefully examined and found to be sensitive to changes in temperature and excitation power. Increasing the excitation power caused the emission peak energies to shift lower in energy due to the bandgap renormalization effect, while the full-width half-maximum (FWHM) broadened and the photoluminescence (PL) peaks weakened as temperature range increased from 80 to 300 K. These findings were compared with those from two other HQD samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Sung Hun Kim, Hong Seok Lee
Summary: CdSe quantum dots (QDs) functionalized with a binary ligand system were prepared using the hot-injection strategy. The optical properties of the resultant CdSe QDs were investigated under different reaction parameters using absorption and photoluminescence (PL) spectroscopy. The redshift, spectral broadening, and change in full-width at half maximum (FWHM) of the PL peak were observed with increasing reaction time and oleic acid ligand molar ratio, as well as after 20 min of reaction due to quantum size effect, rapid abnormal growth, and monomer depletion.
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Hwi Je Woo, Sangmin Ji, Jaewon Han, Seongwon Woo, Hyuntae Kim, Seonyeong Kim, Chang-Won Lee, Soobong Choi, Deok-Soo Kim, Mun Seok Jeong, Euyheon Hwang, Byungkwon Lim, Young Jae Song
Summary: We used scattering-type near-field scanning optical microscopy (s-NSOM) to observe optical phenomena on mono-crystalline silver nanoflakes. The momentum of tip-launched surface plasmon polaritons (SPPs) was successfully identified and showed good agreement with analytical calculations.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Taesun Yun, Yong Bin Kim, Taegeon Lee, Heesuk Rho, Hyeongwoo Lee, Kyoung-Duck Park, Hong Seok Lee, Sangmin An
Summary: This article demonstrates a direct 3D printing technique using a micropipette and an atomic force microscope to print cadmium selenide quantum dot solution into microstructures, achieving micro/nanoscale patterning.
NANOSCALE ADVANCES
(2023)
Article
Physics, Applied
Sung Hun Kim, Hong Seok Lee
Summary: We passivated the surfaces of CdSe quantum dots (QDs) with Z-type ligands and demonstrated enhanced emission from the QDs. The presence of Z-type ligands effectively repaired surface defects and increased the photoluminescence intensity of the QDs, while the absence of ligands caused surface defects and decreased the photoluminescence intensity. Temperature and ligand treatment also had an impact on the surface properties and emission of the CdSe QDs.
APPLIED SCIENCE AND CONVERGENCE TECHNOLOGY
(2022)
Article
Physics, Applied
Heedae Kim, Sung Hun Kim, Hong Seok Lee
Summary: In this work, the size-dependent optical properties of CdSe nanocrystals (NCs) at low temperature (around 10 K) were demonstrated. The shift of photoluminescence (PL) peak to higher energies with decreasing growth time of synthesized CdSe NCs was attributed to the differences in size. Power-dependent PL measurements showed linearly increased PL intensities with laser excitation powers, supporting the excitonic properties of confined states in CdSe NCs. Carrier dynamics of CdSe NCs were observed using time-resolved PL measurements, with increased carrier decay times as the sizes of CdSe NCs increased.
APPLIED SCIENCE AND CONVERGENCE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Wonchae Jeong, Taeyoung Kim, Yoonsok Kim, Mun Seok Jeong, Eun Kyu Kim
Summary: We demonstrate area-selective doping of MoS2 field-effect transistors using 1,2-dichloroethane (DCE) solution. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy measurements confirm the blocked layer (BL) using a photoresist, which suppresses the doping effect of the DCE treatment. Electrical measurements confirm the enhancement in field-effect mobility and subthreshold swing after area-selective doping.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Hyeongwoo Lee, Yeonjeong Koo, Shailabh Kumar, Yunjo Jeong, Dong Gwon Heo, Soo Ho Choi, Huitae Joo, Mingu Kang, Radwanul Hasan Siddique, Ki Kang Kim, Hong Seok Lee, Sangmin An, Hyuck Choo, Kyoung-Duck Park
Summary: In this study, the authors present a method for all-optical control of exciton-to-trion conversion and its spatial distribution in a monolayer of MoS2. They induce a nanoscale strain gradient in a 2D crystal on a lateral MIM waveguide and use propagating SPPs to localize hot electrons, facilitating complete exciton-to-trion conversion even at ambient conditions. The SPP mode is modulated using adaptive wavefront shaping, enabling reversible all-optical control of the exciton-to-trion conversion rate and trion distribution.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Ming Mei, Minju Kim, Minwoo Kim, Inhong Kim, Hong Seok Lee, Robert A. Taylor, Kwangseuk Kyhm
Summary: The optical modal gain of Cd0.6Zn0.4Te/ZnTe double quantum dots was measured using a variable stripe length method. Two gain spectra were observed with a large separation layer thickness of ZnTe, corresponding to the exciton levels of the large and small quantum dots. With a small separation layer thickness of ZnTe, a merged single gain spectrum was observed, indicating a coupled state between the two types of quantum dots.
Article
Materials Science, Multidisciplinary
Geunchang Choi, Dong-Hwan Choi, Junho Ryeom, Dae Young, Wu-Sin Kim, Ju-Jin Kim, Young-Mi Bahk, Mun Seok Jeong
Summary: High-quality indium thin films were fabricated by substrate cooling method, reducing the threshold thickness for insulator-to-metal transition. The films' complex conductivities were measured by terahertz time-domain spectroscopy, showing that the conductivity of the cooled indium films was 10 times higher than that deposited at room temperature, despite their lower thickness. These results suggest the promising applications of substrate cooling in metal thin films and contacts.
CURRENT APPLIED PHYSICS
(2023)
Article
Automation & Control Systems
Jaekak Yoo, Youngwoo Cho, Byeonggeun Jeong, Soo Ho Choi, Ki Kang Kim, Seong Chu Lim, Seung Mi Lee, Jaegul Choo, Mun Seok Jeong
Summary: The application of explainable artificial intelligence in nanomaterial research has facilitated the discovery of novel physical findings. In this study, the correlation between light scattering and emission in a WSe2 monolayer is investigated by bridging explainable artificial intelligence and quantum mechanical calculations. Convolutional neural networks are trained using light scattering and emission data to determine the relationships between them. The findings are independently evaluated through quantum mechanical calculations, providing reliable fundamental physical insight and suggesting a novel methodology for materials science.
ADVANCED INTELLIGENT SYSTEMS
(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)
