Article
Materials Science, Multidisciplinary
Sungjun Yang, Sangmoon Park
Summary: Optical materials were prepared via solid-state reaction, with X-ray diffraction and photoluminescence emission spectra analyzed. Investigations on internal quantum efficiency and parameters related to white LEDs were conducted.
Article
Chemistry, Multidisciplinary
Wenke Ruan, Renrong Zhang, Qi Zhong, Yan Fu, Zhiwei Yang, Mubiao Xie
Summary: A series of Ba3P4O13:xEu(2+/3+) phosphors were synthesized at a relatively low temperature in a CO reduction atmosphere, and their crystallization and optical properties were studied. The results show that the emission color of the phosphor can be adjusted by changing the Eu ion doping concentration, making it a potential white light-emitting material.
Article
Chemistry, Inorganic & Nuclear
Wenke Ruan, Mubiao Xie, Qiaoli Yang, Limin Hu, Kangsheng Su
Summary: A series of single-phase white light-emitting phosphors Ca9Lu(PO4)(7):xEu(2+/3+) were successfully synthesized and their crystallization and optical properties were investigated. By adjusting the valence mixing of Eu2+/Eu3+ ions, the emission colors can change from blue-green to white and eventually to red.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Elena V. V. Sipina, Dmitry A. A. Spassky, Nataliya R. R. Krutyak, Vladimir A. A. Morozov, Evgenia S. S. Zhukovskaya, Alexei A. A. Belik, Mikhail S. S. Manylov, Bogdan I. I. Lazoryak, Dina V. V. Deyneko
Summary: beta-Ca-3(PO4)(2)-type phosphors Ca9-xMnxEu(PO4)(7) were synthesized and characterized. The abnormal reduction of Eu3+ to Eu2+ in air was observed and confirmed by PL spectra study and XPS. The redistribution of Eu2+/Eu3+ ions among crystal sites and the abnormal quenching of Eu3+ emission were discussed in detail.
Article
Materials Science, Ceramics
Qiuling Chen, Yinlei Hao, Qiuping Chen
Summary: A novel Eu2+/Eu3+:Na3Bi5(PO4)6 phosphor with eulytite-like structure was synthesized via high temperature solid-state reaction in reduction environment. The study investigated its structure, luminescence performances, and thermal stability, and found that Eu doping and Eu2+ activation significantly improved the properties of the phosphor, especially in tunable red emission.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Atsunori Hashimoto, Jumpei Ueda, Yasushi Aoki, Pieter Dorenbos, Setsuhisa Tanabe
Summary: RE2O2S:Eu3+-Ln(3+) (RE = La, Gd, Y, Lu; Ln = Pr, Tb) samples were prepared and studied as red persistent phosphors. Eu3+-singly doped RE2O2S showed weak TL glow peaks, but additional strong TL peaks were observed by codoping Pr3+ or Tb3+ ions. The PersL and TL spectra only showed luminescence from Eu3+, indicating that Eu3+ acts as a recombination center while Pr3+ and Tb3+ ions act as hole trap centers. La2O2S:Eu3+-Pr3+ was found to be the best composition, displaying strong red persistent luminescence at ambient temperature.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
ChaoFei Luo, Ke Liu, WeiWei Ji, Zhan Li, Liangjun Yin, LuYuan Hao, Xin Xu, Simeon Agathopoulos
Summary: A series of apatite phosphors with a general formula of Ca2+xLa8-x(SiO4)(6)O2-0.5x: Eu2+ were successfully synthesized, showing strong green emission at 510 nm with increasing Ca2+ substitution for La3+ ions and the reduction from Eu3+ to Eu2+ ions. XANES results indicated higher Eu2+ content with increasing x value. Rietveld refinement and XANES analyses suggested that the non-equivalent substitution of Ca2+ for La3+ led to a decrease in the number of O2- ions in the crystal, favoring the reduction of Eu3+ to Eu2+.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Shaoqiang Huang, Chaogang Lou, Han Diao, Zhaoyong Wang, YunZhen Yin
Summary: By mixing Y2O3:Eu3+ (YO) phosphors with CaAlSiN3:Eu2+ (CASN) phosphors in ethyl vinyl acetate films, the conversion efficiency of crystalline silicon solar cells is significantly improved. This is attributed to the scattering effect of YO phosphors which enhances light absorption, leading to a higher external quantum efficiency in the wavelength range below 280 nm for the solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Lei Liu, Xianying Shao, Zhenyuan Zhang, Jiayu Liu, Yuebo Hu, Chaofeng Zhu
Summary: Eu-doped aluminosilicate oxyfluoride glass was studied using various techniques. Reduction of Eu3+ to Eu2+ ions was observed in the glass prepared in air. The emission spectra and fluorescence lifetimes of Eu2+ and Eu3+ ions varied with the incident beam wavelength and excitation wavelength, respectively. The energy transfer and emission mechanisms of Eu2+ ions were also discussed.
Article
Chemistry, Physical
Alexis Duval, Yan Suffren, Mourad Benabdesselam, Patrick Houizot, Tanguy Rouxel
Summary: This article reports on the luminescence properties of green Ba4Si6O16:Eu2+, rare-earths (RE) phosphors and discusses its long-lasting phosphorescence in terms of trap depths and concentrations. A second emission band is observed at low temperatures, and a new mechanoluminescence mechanism is proposed.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Optics
Wanping Chen, Yuejun Ouyang, Min Mo, Haizhou Zhang, Qiong Su
Summary: The study involved preparing Eu2+ and Eu3+ co-activated YF3:Eu phosphors using a traditional hydrothermal method, where the relative amounts of Eu2+ and Eu3+ could be tuned by adjusting Eu concentration, citric acid concentration, and hydrothermal reaction time. Energy transfer from Eu2+ to Eu3+ was observed, resulting in effective excitation by ultraviolet light and tunable luminescence colors from red, white, to blue, offering an alternative solution for new LED phosphor development.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Nianmin Chen, Yunjian Wang, Longfeng Li, Lei Geng, Maolin Zhang
Summary: Designing phosphors that can be excited by blue light is crucial for white light-emitting diodes (w-LEDs). In this study, a new type of SZO:xEu(3+) phosphors, based on solid-state reactions, was developed. The doping of Eu3+ ions led to a phase transformation in the host material, Sr3Zr2O7, and the impact of Eu3+ ion occupancy on the phosphors' lifetime was discussed. The fabricated w-LED using YAG:Ce3+ and SZO:0.1Eu(3+) phosphors showed warm white light with a high color rendering index and color temperature, indicating its potential for application in blue chip white LEDs.
Article
Chemistry, Physical
M. Ruhul Amin, Eugenia Elzer, Wolfgang Schnick, Alexander Moewes
Summary: The band gaps, electronic structures, optical properties, and energy levels of the incorporated activator Eu2+ ions in the synthesized luminescent nitridoberyllates MBe20N14: Eu2+ (M = Sr, Ba) were investigated. The band gaps for both compounds were found to be 4.4 +/- 0.3 eV, and the energy levels of Eu2+ ions were determined to be 0.31 +/- 0.04 eV for Sr and 0.30 +/- 0.04 eV for Ba. X-ray excited optical luminescence measurements showed luminescence in the blue spectral region at 430 nm for Sr and 427 nm for Ba.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Ke Su, Lefu Mei, Qingfeng Guo, Pengfei Shuai, Yujia Wang, Yukun Liu, Yang Jin, Zhijian Peng, Bo Zou, Libing Liao
Summary: A multi-mode optical pressure sensor based on Eu2+-doped Li4SrCa(SiO4)(2) phosphors has been designed, which shows high sensitivity and accuracy in measuring pressure in various complex environments. The sensor demonstrates improved performance compared to commercially available ruby sensors, with a massive redshift in the emission peak and a new approach in pressure readout method.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Arup K. Kunti, Nirmalendu Patra, Richard A. Harris, Shailendra K. Sharma, Dibyendu Bhattacharyya, Sambhu N. Jha, Hendrik C. Swart
Summary: This study investigated the impact of Eu3+ doping concentration on the structural and luminescence properties of Eu3+ doped CaZrO3 red phosphors. Rietveld refinement method confirmed the occupancy of Eu3+ ions and explored the local structure around Eu3+ ions. Luminescence investigation showed the brightest red emission at 3 mol% Eu3+ doping concentration and revealed the energy transfer mechanism.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Yanbin Wang, Xinyou Huang, Ziqiu Cheng, Penghui Chen, Yuyang Chen, Junhao Ye, Haohong Chen, Zhenzhen Zhou, Denis Yu Kosyanov, Jiang Li
Summary: Uniform Al2O3-Ce:LuAG composite phosphor ceramics (CPCs) with excellent luminescent properties and thermal stability have been successfully synthesized in this study, showing great potential for application in solid-state laser lighting.
Article
Materials Science, Multidisciplinary
Syed Muhammad Ali Zaidi, Mazhar Ali Kalyar, Zulfiqar Ali Raza, Aayesha Shoukat, Rubaila Waseem, Muhammad Aslam
Summary: Polyvinyl alcohol (PVA) nanocomposite strips embedded with graphene nanosheets and copper-ferrite nanoparticles were synthesized using solution casting technique. Laser pulse irradiations were then applied to modify the structural, optical, and electrical properties of the strips, showing potential for optoelectronic devices.
Article
Materials Science, Multidisciplinary
Yunru Chen, Jialing Wu, Jiajia Wang, Shihui Ma, Hongwei Yu
Summary: This paper investigates the angular non-critical phase-matching second-harmonic-generation properties of Ba3(ZnB5O10)PO4 crystal and explores its potential applications in the output spectral regions.
Article
Materials Science, Multidisciplinary
Qun Jing, Menglin Zhu, Lu Li, Xu Ji, Haiming Duan, Henglei Chen, Ming-Hsien Lee
Summary: The paper introduces two new nonlinear optical materials, MZnPO4 (M = Rb, Cs), synthesized by cation substitution. These materials exhibit a honeycomb-like structure and show mild SHG responses with short absorption edges. The thermal properties, IR spectra, and theoretical calculations of the materials are also discussed.
Article
Materials Science, Multidisciplinary
Camila Ianhez-Pereira, Akhil Kuriakose, Ariano De Giovanni Rodrigues, Ana Luiza Costa Silva, Ottavia Jedrkiewicz, Monica Bollani, Marcio Peron Franco de Godoy
Summary: This study aims to evaluate the crystalline changes induced by ultrafast laser micromachining on manganese oxide thin films using micro-Raman spectroscopy. The results show that laser-writing is effective in locally modifying low-crystallinity films and increasing crystallite sizes, highlighting an interesting approach to evaluate laser-induced structural modifications on metal oxide thin films.
Article
Materials Science, Multidisciplinary
Kamal Bansal, Neeraj Kumar Mishra, Ibrahim Abdullahi, Param Jeet Singh, Mohit Tyagi, Sukhpal Singh
Summary: A novel Sm3+ activated oxyfluoride glass was synthesized and its structure and properties were analyzed. The glass showed potential applications in lasers, optical temperature sensing, and high-energy scintillators.
Article
Materials Science, Multidisciplinary
Xingjian Wang, Zhixu Wu, Jiawei Zhu, Yubin Kang, Mengqiang Cai, Yong Xia, Hui Deng
Summary: Antimony sulfide (Sb2S3) has been investigated as a promising material for visible light photodetectors due to its non-toxicity, stability, and high absorption coefficient. In this study, we systematically explored the impact of key parameters on the performance of Sb2S3 devices using simulation and successfully fabricated self-powered photodetectors with high responsivity and specific detectivity. Furthermore, we demonstrated the application of the Sb2S3 detector in a scanning imaging system, showcasing its potential for developing new types of visible light detectors and imaging systems.
Article
Materials Science, Multidisciplinary
O. I. Sallam, R. M. Ahmed
Summary: The 20NaF-60P2O5-20Na2O fluorophosphate glass systems doped with 3 wt% of CoO and NiO were investigated for their optical parameters before and after gamma irradiation. The presence of defects within the glass network and the addition of transition metals were found to affect the properties of the composites. After irradiation, a red shift was observed in the dissipation factor spectrum. The energy lost at the surface of the composites was larger than the energy lost within the constituent materials. All investigated composites showed insulating behavior and exhibited increased nonlinear optical parameters after irradiation, with the CoO-doped composite showing the highest values.
Article
Materials Science, Multidisciplinary
Fahimeh Ahmadi, Zeinab Ebrahimpour, Asghar Asgari, Bao Van
Summary: In this study, Er3+-doped sulfophosphate glasses containing titanium nanoparticles (TiO2 NPs) and different concentrations of silver nanoparticles (AgNPs) were synthesized. The impact of AgNPs on the physical and structural characteristics, optical absorption and emission features, and photocatalytic activity of the glasses were investigated. The results showed that the addition of AgNPs enhanced the emission intensity of the glasses, with the system containing 0.04 mol% of AgNPs exhibiting optimal performance. Furthermore, the presence of AgNPs and TiO2 NPs in the glass matrix positively affected the photocatalytic performance.
Article
Materials Science, Multidisciplinary
Zhuang Li, Rongfei Huang, Wei Yuan, Shaoqiang Zheng, Wenlu Liao, Huiying Xu, Zhiping Cai
Summary: This study reports the first realization of an 868 nm Pr:YLF laser pumped by an InGaN blue laser diode. The laser achieved a maximum power of 641 mW with stable output and good beam quality. The experimental results were in agreement with theoretical simulations.
Article
Materials Science, Multidisciplinary
Bhishma Karki, Youssef Trabelsi, Amrindra Pal, Sofyan A. Taya, Ram Bharos Yadav
Summary: This study proposes an SF11 Prism- Ag- ZnO nanowires-CeO2-Sensing layer-based surface plasmon resonance sensor for measuring dopamine concentration in human blood. The sensor demonstrates high sensitivity and detection accuracy, and holds significant importance for early diagnosis of neurological diseases.
Article
Materials Science, Multidisciplinary
M. Taoufiq, A. Soussi, A. Elfanaoui, A. Ait Hssi, S. Baoubih, A. Ihlal, K. Bouabid
Summary: In this study, the effect of copper doping within ZnS on glass substrates was investigated through experimental and theoretical approaches. Pure ZnS and Cu-doped ZnS films with varying copper concentrations were deposited on glass substrates using the SILAR technique. The structural, morphological, and optical properties of the films were characterized, and the theoretical FP-LAPW method based on density functional theory was employed to study the properties of copper-doped ZnS.