KEY ENGINEERING MATERIALS
·
2016
·
IF 0
D.C. Huang,You Fu Zhou,Chao Quan,Wen Tao Xu
New luminescent oxynitridosilicates doped with Eu2+ and Ce3+ have been synthesized by solid state reaction method at 1450oC. The host has the general formula La1-ySr1-xSiO3N: (yCe3+, xEu2+), which presents greenish-yellow or orange photoluminescence under UV/blue excitation. Remarkable long wavelength emissions centered above 565 nm were observed for the Ce3+ activated oxynitridosilicates, with compositions LaSrSiO3N:0.02Ce3+, and LaSrSiO3N:(0.02Ce3+, 0.02Eu2+) for 598 nm due to a significant amount of energy transfer from Ce3+ ions to Eu2+ ions. By combining the title LaSrSiO3N:(Ce3+, Eu2+) phosphors with the 450 nm InGaN chip, a broad range of white light with correlated color temperatures of ~3500 K and color-rendering index of 92 can be generated, demonstrating their promising practical applicability to the warm-white light-emitting diodes.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 31
·15887-15893
·
IF 5.968
Hongde Luo,Jie Liu,Xiao Zheng,Lixian Han,Kuaixia Ren,Xibin Yu
Trivalent ions B3+, Al3+ and Ga3+ have been introduced into Sr3SiO5:Ce3+ in this study. Among these ions, Al3+ and Ga3+ act as charge compensators and significantly enhance the maximum emission of Ce3+ by about 100% and 90%, respectively. Then, Al3+, Eu2+ co-doped Sr3SiO5:Ce3+ phosphors have been researched, which indicate that the emission spectra can be tuned from 530 to 575 nm by changing the concentration of Eu2+. The CIE chromaticity coordinates of the phosphors were calculated from (0.342, 0.518) to (0.442, 0.479). This indicates a potential for applications in daylight LEDs or warm-white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Renping Cao,Jinrong Wang,Binhui Zhong,Ting Chen,Bang Lan,Fangrui Cheng,Ru Liu,Jing Wang
New tunable-color luminescent materials with single pure phase are one of the main research objectives at present. We synthesize La 7 Nb 3 W 4 O 30 :R (LNWO:R) (R Dy 3+ , Eu 3+ , and Dy 3+ /Eu 3+ ) in air. The high temperature solid-state method is used. We study the purity, crystal phase and structure, luminescence properties, and lifetimes of the samples. Excitation spectrum of LNWO:Dy 3+ comes from the O 2− - Dy 3+ charge transfer band (CTB) and the f – f electron transitions of Dy 3+ . LNWO:Dy 3+ can glow yellow light due to the transitions 4 F 9/2 → 6 H 15/2 , 6 H 13/2 , 6 H 11/2 , and 6 H 9/2 of Dy 3+ . LNWO:Eu 3+ has excitation spectrum due to the O 2− - Eu 3+ CTB and the f – f electron transitions of Eu 3+ . LNWO:Eu 3+ emits the red-orange/red light owing to the transitions 5 D 0 → 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 of Eu 3+ . The emitting color of LNWO:Dy 3+ , Eu 3+ can be adjusted by changing the excitation wavelength and the content of Dy 3+ and Eu 3+ because of the double effects of energy transfer among Eu 3+ ions and energy of Dy 3+ . The yellow, red-orange, and red emission of LNWO:Dy 3+ , Eu 3+ is found. The lifetime rises with adding doped-ions concentration owing to the increase of non-radiative transitions. The luminous mechanism is analyzed via energy level diagrams. The research results offer a help for the development of new luminescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 14
·4786-4793
·
IF 3.842
Qianming Wang,Zhengyang Zhang,Yuhui Zheng,Weisheng Cai,Yifei Yu
A systematic study of the preparation of lanthanide (Eu3+, Tb3+, Sm3+ and Dy3+) phosphors was carried out and luminescent materials (red, green, orange-red and blue-yellow) were successfully achieved at low temperature (70 °C) in 45 min, using simultaneous supersonic and microwave irradiation. Scanning and transmission electron microscopic images indicate that one-dimensional nanorods with diameters of 10–20 nm and lengths of up to 200 nm were formed. The phosphors were entrapped in cellulose gels and the corresponding hydrogels were also strongly emissive.
研究领域:
材料科学
·
纳米技术
·
发光材料
·
凝胶化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yanzhi Zhang,Xiaoxu Deng,Ruirui Cui,Xiang Guo,Jun Zhang,Chaoyong Deng
In order to obtain efficient single-phase co-doped phosphors with excellent luminescence properties under near-ultraviolet excitation, Ca 3 Gd 2 Si 3 O 12 : x Dy 3+ (CGSO: x Dy 3+ ) and Ca 3 Gd 2 Si 3 O 12 :0.08Dy 3+ , y Sm 3+ (CGSO:0.08Dy 3+ , y Sm 3+ ) phosphors were effectively manufactured using the classical high-temperature solid-phase method. The phase structure, morphology and XPS test results of the phosphor all show that the Ca 3 Gd 2 Si 3 O 12 (CGSO) material has been successfully synthesized, and Dy 3+ and Sm 3+ ions have been successfully doped into the matrix lattice. Under 362 nm illumination, the PL spectra of CGSO:0.08Dy 3+ , y Sm 3+ phosphor revealed that the typical peak intensity of Dy 3+ ions declined as the amount of Sm 3+ ions increased, whereas the distinctive peak intensity of Sm 3+ ions achieved its maximum at y = 0.07. As Sm 3+ doping grows larger, the fluorescence lifetime shortens, signifying the occurrence of transferring energy among Dy 3+ and Sm 3+ ions, with a maximum efficiency of 81 % being attained. The Ca 3 Gd 2 Si 3 O 12 :0.08Dy 3+ , y Sm 3+ phosphor demonstrates a commendable thermal stability of 90.17 %, with adjustments to the Sm 3+ concentration revealing the potential to yield warm white light, as evidenced by both CIE chromaticity coordinates and CCT measurements. In addition, compared with the phosphor containing only Dy 3+ , the LED assembled with CGSO:0.08Dy 3+ , y Sm 3+ phosphor containing Sm 3+ ions and 365 nm LED chip emits warmer white light with lower color temperature, which confirms the application value of CGSO:0.08Dy 3+ , y Sm 3+ phosphor in the domain of solid-state lighting.
研究领域:
材料科学
·
光学
·
固体照明
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Bo Liu,You Li,Sai Xu,Jianglong Chang,Yuefeng Gao,Hongquan Yu,Yichao Wang,Baojiu Chen
Lead-free double perovskite (DP) materials have garnered growing interest because of their outstanding optoelectronic attributes. Nevertheless, realizing efficient, multimodal photoluminescence (PL) with adjustable emission spectra within single-host DP materials still poses a formidable hurdle. Herein, Er-based lead-free DPs (Cs2NaErCl6) were developed, which achieves downshift (DS) emissions from visible to near-infrared (NIR) and multicolor upconversion (UC) emissions, resulting from the abundant energy levels of Er3+ ions. Alloying with Yb3+ introduces new Yb3+-Er3+ cross-relaxation (CR) pathways, leading to a 308.5-fold increase in DS red emission and achieving a maximum color purity of 98.63%. Additionally, Yb3+ alloying enhances UC luminescence by 10.8-fold due to its strong absorption cross section around 980 nm. The colors of the UC emission can be adjusted by altering the doping concentration of Yb3+ and laser power density. Spectral analysis and theoretical calculations reveal the high compatibility of Yb3+ ions with Cs2NaErCl6, and the critical role of CR and energy-transfer processes in achieving efficient, tunable, and multimodal PL. Furthermore, the developed DP materials have been utilized in anticounterfeiting, information encoding, and narrow-band NIR photodetectors, expanding the versatile uses of rare-earth (RE)-based DP materials in the optoelectronics field.
研究领域:
材料科学
·
光学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Zhongfa Li,Wenjun Zhang,Chengyue Xin,Zihan Chen,Jian Sheng
Mn ions in different valence states can emit light of different colors in an octahedral coordination environment, which is conducive to the development of a single matrix with multi-color luminescence and applications in the field of anti-counterfeiting. The dual mode multi-color luminescent material CaSb 2 O 6 : Mn has been successfully synthesized using a single Mn source in the atmosphere. The CaSb 2 O 6 matrix itself can also absorb 285 nm UV light, emit blue light, and show a long afterglow phenomenon. Both Mn 4+ and Mn 2+ ions will appear in the [SbO 6 ] octahedra, whether the Mn source adopts MnCO 3 or MnO 2 . The Mn 4+ ion exhibits red emission upon UV excitation at 347 nm. The Mn 2+ ion can emit a bright green light at 285 nm excitation while exhibiting a long afterglow phenomenon. In this study, the Mn 2+ doped octahedron showed unique green emission and broadens the range of its photoluminescence (PL) wavelength. The performance of the material's long afterglow properties on the digital codes demonstrates its potential for dynamic anti-counterfeiting.
研究领域:
材料科学
·
光学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 5
·055011
·
IF 2.07
Jian Zhang,Ming Wang,Zhiyong Fang,Xiaohui Lai,Zhiqiang Zhong,Rui Zhang
Bi3+-activated luminescence materials have gained growing attentions for optoelectronic applications. In this work, a novel BaLu2MgGa2Si2O12: Bi3+ garnet phosphor was synthesized through a traditional high-temperature solid phase reaction method. The crystal structure was ascertained through X-ray diffraction analysis and Rietveld structural refinement. The particle morphology and constituent elements distributions were investigated through scanning electron microscope and element mapping. Excited at 330 or 370 nm, the phosphors exhibit two emission peaks located at 413 and 495 nm, which is ascribed to the allowed transitions of Bi3+: 3P1 → 1S0. The luminescence intensity reaches the maximum at the 4 mol% Bi3+ doping content, and the emission color is easily manipulated by tuning the excitation wavelength. Besides, the luminescence intensity at 150 ℃ remains 80% of that at room temperature. These results suggest that the novel phosphors have promising application in the near-UV excited white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xue Bai,Zan Xu,Yingzhu Zi,Heping Zhao,Bokun Zhu,Rongbao Feng,Yangke Cun,Anjun Huang,Yue Liu,Yuewei Li,Jianbei Qiu,Zhiguo Song,Steven J. Langford,Jiayan Liao,Zhengwen Yang
This study explores the integration of X-ray-induced photochromism and photoluminescence in a single material, offering innovative multi-mode applications in optical memory, anti-counterfeiting, and X-ray detection and imaging. The photochromic phosphor LiAlSi 2 O 6 :Sm 3+ is synthesized, which undergoes a color change from white to dark green under bright field conditions and displays orange photoluminescence in dark field conditions after X-ray exposure due to defect formation. The phosphor shows accelerated bleaching and recovery under 473 nm laser stimulation. The distinct X-ray-induced color contrast and luminescence intensity modification in LiAlSi 2 O 6 :Sm 3+ highlight its potential in advanced luminescent material design. Moreover, a LiAlSi 2 O 6 :Sm 3+ -based flexible film demonstrates “dual-mode” 3D X-ray imaging and detection capabilities, paving the way for future X-ray detecting and imaging device research.
研究领域:
材料科学
·
光学
·
医学影像
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Yingnan Dong,Yumeng Jia,Kenan Xu,Xu Sun,Jing Wang,Zhongxiang Shi,Yanchen Liu
In order to expand the multi-scene application of rare earth doped luminescent materials in the field of blue light illumination, a series of Ce 3+ doped Na-β″-Al 2 O 3 phosphors were prepared by solid-state method with Na-β″-Al 2 O 3 as matrix. The crystal structure, micro-morphology, optical properties and thermal stability were investigated systematically. The results show that the activated ion Ce 3+ in the prepared Na-β″-Al 2 O 3 : x Ce 3+ phosphor replaces the Al 3+ (CN = 6) lattice in the crystal, and with a outstanding blue light emission. In addition, the thermal stability of Na-β″-Al 2 O 3 : 0.05Ce 3+ phosphor is analyzed by variable temperature spectrum, and its luminescence intensity at 573K can reach 71.55 % at room temperature. Finally, Na-β″-Al 2 O 3 : 0.05Ce 3+ phosphors are packaged with 330 nm n-UV LED chips to obtain high quality blue LED devices. With its high color rendering index (81.60), low color temperature (2886 K) and good color consistency, it provides a theoretical basis for the application of Na-β″-Al 2 O 3 -based phosphors in blue LED devices, and makes it show great application potential in the field of solid-state blue spectral lighting.
研究领域:
材料科学
·
固体化学
·
发光材料
·
照明工程
·
无机功能材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 24
·9501-9510
·
IF 4.569
Jianhong Ding,Meng Kuang,Shuifu Liu,Ziheng Zhang,Kangrong Huang,Jiansheng Huo,Haiyong Ni,Qiuhong Zhang,Junhao Li
Developing novel luminescent materials with ideal properties is an endless project, urged by growing requirements of advances in energy saving, healthy lighting and environmental friendliness. Herein, a series of ScCaOBO3:Ce3+,Mn2+ phosphors with excellent luminescence properties were synthesized by the high temperature solid state method. X-ray diffraction was applied to analyse the phase composition of the obtained phosphors. The morphology and dopant distribution were observed by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS), respectively. The Rietveld refinements and luminescence spectra indicate that Ce3+ preferentially occupies the Sc3+ site and produces a blue emission band at around 460 nm, which originates from the characteristic 5d–4f transitions, while Mn2+ preferentially occupies the Ca2+ site and emits red light due to its characteristic 4T1(4G)–6A1(6S) transitions. Upon excitation at 354 nm, both Ce3+ and Mn2+ emissions can be obtained and further investigations evidenced that the broad and intense light emission of Mn2+ located in the red spectral region is the result of energy transfer from Ce3+ to Mn2+. Theoretical calculations reveal that the energy transfer process from Ce3+ to Mn2+ is of the resonance type and is governed by electric dipole–dipole interactions. Since the ScCaOBO3:Ce3+,Mn2+ phosphors are capable of producing broadband emissions that widely cover the blue and red spectral regions, the introduction of a green light-emitting phosphor CMA:Tb3+ can conveniently generate high quality white light. Therefore, a white light-emitting diode device with extremely high color rendering indices, Ra = 93.7 and R9 = 91.9, was successfully obtained.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Arabian Journal of Chemistry
·
2021
·
IF 5.165
Hong-Xia Song,Ting Lei,Fang Wu,Xiaoyu He,Jiang Wang
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( http://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the Editor-in-Chief. In investigating concerns brought up regarding the authenticity of the article, the editors reached out to the corresponding author for an explanation. The authors failed to reply. The editors therefore feel that the findings of the manuscript cannot be relied upon and that the article needs to be retracted.
研究领域:
配位化学
·
医学应用
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）