CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yi Zhang,Peng Wang,Bibo Lou,Shengjie Niu,Haonian Bai,Dan Zhang,Chong-Geng Ma
To fulfill the escalating demand for high-quality white lighting, the exploration of novel and advanced luminescent materials holds a significant role in addressing the issues of reabsorption, color bleaching and deviation in modern WLED solid-state lighting technology based on phosphor-converted materials. In this research, a series of novel Bi 3+ -activated gallium-germanate luminescent materials Sr 2 Ga 2 GeO 7 (SGGO): Bi 3+ were synthesized by means of the classic high-temperature solid-phase method. A comprehensive exploration of their crystal structure, electronic structure, and optical transition properties were conducted through a combined experimental and theoretical calculation analysis. The research outcomes suggest that Bi 3+ , which is prone to occupying Sr sites, shows a remarkable blue emission with a peak at approximately 450 nm throughout the entire spectral range from near ultraviolet (UV) to near infrared when excited at 315 nm, and this is attributed to the 3 P 1 → 1 S 0 transition. Additionally, by devising an efficient energy transfer strategy from Bi 3+ to Eu 3+ , single-component white light can be attained by merely adjusting the doping concentration of Eu 3+ in the SGGO: Bi 3+ , Eu 3+ co-activation system. Eventually, devices packaged based on 310 nm ultraviolet chips also demonstrate the potential application of the synthesized material in WLEDs. These findings contribute to a deeper understanding of the luminescence and energy transfer mechanisms of Bi 3+ -activated systems, and also offer essential guidance for the advancement of high-performance Bi 3+ -doped advanced light-conversion materials and effective materials for various applications demanding enhanced light conversion properties.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2020
·Vol. 9
·期 12
·126001
·
IF 2.142
Dongxin Shi,Xiaoling Xie,Haiqi Pu,Xi Zhang,Qiang Zhou,Zhengliang Wang,Yanqing Ye,Minghong Chen
A novel red-emitting Rb2KGaF6:Mn4+ phosphor with octahedral particulate morphology was presented. The XRD Rietveld refinement results indicate that the phosphor crystallized into the cubic phase of Fm\overline{3}m space group with double perovskite structure. The photo-luminescence spectrum exhibits intense red emission lines with zero-phonon line (ZPL) and v6 peak locating at 620 and 628 nm respectively. The optical parameters of low color temperature (Tc = 3824 K) and high color rendering index (Ra = 90.2 ) from white LED imply its potential application in solid-state lighting.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2019
·
IF 1.914
Yulin Shi,Yudong Xu,Wenjie Hu,Lei Wang,Ruliang Liu,Heni Wang,Caiyue Zhao,Xinyi Chen,Min Shi
In this article, the authors prepared CaMgAl 10 O 17 : Sm 3+ , CaMgAl 10 O 17 : Eu 3+ and CaMgAl 10 O 17 : Sm 3+ , Eu 3+ phosphors via high temperature solid-state reaction and studied the phase constituents and photoluminescence (PL) of the phosphors as-synthesized. The main emission peaks of CaMgAl 10 O 17 : Sm 3+ at 559 nm, 590 nm and 639 nm are due to 4 G 5/3 → 6 H 5/2 , 4 G 5/3 → 6 H 7/2 and 4 G 5/3 → 6 H 9/2 transitions of Sm 3+ activator, respectively. The optimum doping concentration of Sm 3+ in CaMgAl 10 O 17 is 3 mol. %. The main emissions of CaMgAl 10 O 17 : Eu 3+ peaked at 586 nm and 610 nm belong to 5 D 0 → 7 F J (J = 1, 2) transitions of Eu 3+ activator. When Eu 3+ ions are added into CaMgAl 10 O 17 : 0.03 Sm 3+ phosphors, an energy transfer between Sm 3+ and Eu 3+ via an electrical multipole interaction occurs, and the emission intensity of CaMgAl 10 O 17 : 0.03 Sm 3+ , Eu 3+ phosphors is greatly improved.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Renping Cao,Zhuyang Jiang,Ting Chen,Huang Liang,Xuehua Yi,Yuancong Zhong,Haining Zhang,Wei Luo
In this work, we synthesize successfully Na 4 CaSi 3 O 9 :R (R = Ce 3+ , Sm 3+ , and Ce 3+ /Sm 3+ ) phosphors in the reducing atmosphere (95% N 2 + 5% H 2 ) by using the high-temperature solid-state method. The crystal structure and luminescence properties of samples are investigated. The excitation spectrum of Na 4 CaSi 3 O 9 :Ce 3+ phosphor is observed in the range of 220–400 nm due to the 4 f → 5 d transitions of Ce 3+ ion. The emission spectrum contered at ∼425 nm of Na 4 CaSi 3 O 9 :Ce 3+ phosphor is in the range of 360–650 nm owing to the 5 d → 2 F 5/2 and 2 F 7/2 transitions of Ce 3+ ion. Na 4 CaSi 3 O 9 :Sm 3+ phosphor can show the excitation spectrum in the range of 200–550 nm owing to the O 2− - Sm 3+ charge transfer band and the f - f transitions of Sm 3+ ion, and its emission spectrum covers the region from 575 nm to 750 nm with four emission bands because of the 4 G 5/2 → 6 H 5/2 , 6 H 7/2 , 6 H 9/2 , and 6 H 11/2 transitions of Sm 3+ ion. The tunable emission, luminescence improvement, temperature-dependent emission, and lifetime in Na 4 Ca 0.96-x Si 3 O 9 :4 mol%Ce 3+ , xSm 3+ phosphors are investigated. The luminous mechanism of Na 4 CaSi 3 O 9 :Ce 3+ , Sm 3+ phosphors is explained by using the energy level diagrams of Ce 3+ and Sm 3+ ions. The experimental results are beneficial to research new Ce 3+ and Sm 3+ co-doped phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Qiying Huang,Weihao Ye,Guangqi Hu,Xiaotang Liu
Bi 3+ and Mn 4+ co-activated Mg 3.5 Ge 1.25 O 6 phosphors were synthesized via a solid-state method in air. Codoping Bi 3+ into the matrix leads to effective enhancement of the deep-red emssion (659 nm) compared to Bi 3+ -free samples. The spectroscopic properties are discussed based on the Bi 3+ (6s 2 )→Ge 4+ (3d 10 ) metal-to-metal charge transfer and energy transfer between Bi 3+ and Mn 4+ . All samples emit deep-red emission ascribed to 2 E g → 4 A 2g transition of Mn 4+ . We have carried out the X-ray power diffraction (XRD), photoluminescence spectrum (PL), field emission scanning electron microscope (FESEM), fourier transform infrared spectroscopy (FT-IR) and UV–Vis absorption measurement to investigate the influences induced by Bi 3+ incorporation.
研究领域:
材料科学
·
光学农业
✓ 已验证
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2024
·
IF 2.8
Bingjie Han,Xinyu Chang,Haili Jiang,Yuhan Wang,Fengjun Tian,Kang Li,Sivagunalan Sivanathan,Xinghua Yang
Red inorganic phosphors are widely utilized in the field of artificial plant supplemental lighting. Nevertheless, their red light emission falls short of satisfying the plant's dual requirements for both deep-red and far-red light simultaneously. In this work, multiple red emission Sm 3+ and Sm 3+ -Mn 4+ activated CaGdMgNbO 6 (CGMNO) red phosphors were prepared by high-temperature solid-state reaction. The luminescence characteristics, thermal stability, energy transfer behaviour and optical temperature sensing properties were investigated. The 550–750 nm emission bands of CGMNO:Sm 3+ and CGMNO:Sm 3+ , Mn 4+ matched the absorption band of the plant. The inhibition of energy transfer between activated ions and the structural reconstruction of conduction band traps reveal the anomalous thermal quenching behavior of Sm 3+ ions at high temperatures. These results show that Sm 3+ -Mn 4+ co-activated CGMNO phosphors have potential applications in plant growth.
研究领域:
材料科学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Jintai Lin,Zhan Zhou,Qianming Wang
GdNbO 4 :Eu 3+ and LuTaO 4 :Eu 3+ have been successfully prepared with different fluxes (NaCl, KCl, NaCl and KCl) by the molten salt method. X-ray diffraction (XRD) patterns illustrated that well crystallized GdNbO 4 :Eu 3+ and LuTaO 4 :Eu 3+ in the presence of fluxes were formed under reduced temperature (900 °C) in contrast to conventional method (GdNbO 4 :Eu 3+ : around 1200 °C; LuTaO 4 :Eu 3+ : around 1500 °C). Scanning electron microscope (SEM) images revealed that well dispersed particles were achieved (granular or rod-like structures). Meanwhile, the photo-luminescent studies demonstrated that both niobate and tantalate are efficient hosts to sensitize europium red emissions. The results indicated that GdNbO 4 :Eu 3+ using NaCl as the flux gave much enhanced red emission whereas LuTaO 4 :Eu 3+ synthesized with the assistance of mixed salts (NaCl–KCl) achieved the best luminescence.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Weixi Xia,Yulong Ye,Qinan Mao,Yang Ding,Xinyue Li,Meijiao Liu,Jiasong Zhong
The combination of indoor plant growth lamps and soilless cultivation is considered as a promising direction for future agricultural technology. Its environmentally friendly, effective, and energy-saving characteristics make the plant lighting phosphor widely concerned. However, the phosphor with the required emission spectrum for plant growth while simultaneously achieving dual emission of blue and far-red light is still rarely developed. To address this challenge, a series of Sr 2 GdGaO 5 :Bi 3+ , Sr 2 GdGaO 5 :Mn 4+ , and Sr 2 GdGaO 5 :Bi 3+ , Mn 4+ phosphors have been designed and thoroughly characterized in terms of their phases, morphologies, and optical properties . Dual emission of Sr 2 GdGaO 5 : Bi 3+ , Mn 4+ in blue light (475 nm) and far-red light (726 nm) regions is observed under 350 nm ultraviolet light excitation, and the energy transfer mechanism determined to be dipole-dipole interaction. A high coincidence between plant growth absorption spectrum and co-doping induced double emission is realized. Tremendous acceleration of garlic and bean seedling growth can be observed under the illumination of phosphor-encapsulated LED in soil-free conditions. This comprehensive work contributes to the understanding and utilization of phosphors for efficient indoor plant lighting applications and opens new possibilities for energy-saving and effective plant cultivation.
研究领域:
农业技术
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Na-Na Zhang,Yu-Guo Yang,Xue-Yuan Yan,Meng-Qi Wang,Yuan-Yuan Zhang,Hua-Di Zhang,Rui Zhang,Cheng-Cheng Qiu,Fu-Di Chen,Ji-Yang Wang
In the present work, orange-red Sm 3+ doped La 3 Ga 5 SiO 14 phosphors were successfully formed through high temperature solid state method at 1350 °C. The phase purity, size distribution, vibrations, absorption and series of luminescence characteristics were studied, respectively. The X-ray diffraction and Rietveld refinements results show the single phase and crystal lattice information. The results of scanning electron microscope and energy-dispersive spectroscopy demonstrate the basic particle shape and verify the constituent elements for the prepared samples. The infrared spectra clarify the phonon vibration properties of the La 3 Ga 5 SiO 14 :Sm 3+ phosphors. The UV–visible absorption spectra indicate that the absorption properties and the corresponding band gaps. The luminescence results show that the La 3 Ga 5 SiO 14 :Sm 3+ phosphors emit intense orange-red emission peaking at 600 nm as excited at 401 nm. The optimum doping concentration of Sm 3+ ion is x = 0.05 and the mechanism of concentration quenching is from dipole-quadrupole interaction. In addition, the prepared phosphors have good thermostability, and its thermal activation energy is 0.2161 ev. Finally, red and white light emitting diodes were successfully manufactured with 395 nm chip. All experimental results show that the La 3 Ga 5 SiO 14 :Sm 3+ phosphors have good application prospect in light emitting diodes .
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Applied Spectroscopy
·
2020
·Vol. 87
·期 4
·753-757
·
IF 0.71
Sun J.,Li Q.,Zhou Q.
Eu 3+ -doped NaLaMo 2 O 8 phosphors were synthesized by a conventional solid-state reaction. The phase and luminescent properties of the synthesized phosphors were investigated in the current work. In NaLaMo 2 O 8 , Eu 3+ ions replace La 3+ ions and form solid compound. This substitution induces the 2θ angles of diffraction peaks to shift to larger values. Under excitation at 395 nm, NaLaMo 2 O 8 :Eu 3+ phosphors exhibit emission bands in the range of 550–725 nm originating from 5 D 0 → 7 F J transitions (J = 0, 1, 2, 3, 4) of Eu 3+ . The strongest emission band corresponds to the 5 D 0 → 7 F 2 transition, which indicates a site of Eu 3+ without inversion symmetry in NaLaMo 2 O 8 . The Eu 3+ concentration has obvious influence on the luminescent properties of NaLaMo 2 O 8 :Eu 3+ phosphors. NaLaMo 2 O 8 :6 mol%Eu 3+ has the strongest excitation and emission intensities.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Renping Cao,Minhong Wu,Bang Lan,Tengyu Huang,Jingheng Nie,Fangrui Cheng,Xiaohu Luo,Jing Wang
New single phase and adjustable emission phosphors have attracted a lot of attention because of the good luminous properties. In this work, Sm 3+ doped CaTbAl 3 O 7 phosphors are prepared in air by solid-state method. The crystal structure, concentration dependent spectra, lifetimes, and luminescence properties are investigated. Because of the 4 f 8 → 4 f 7 5 d 1 and 4 f → 4 f transitions of Tb 3+ ion, host (CaTbAl 3 O 7 ) shows an excitation spectrum in the range of 220–520 nm under monitored at 544 nm and emits yellow-green light under excitation 248, 284, and 368 nm due to the 5 D 4 → 7 F J ( J = 0, 1, 2, 3, 4, 5, and 6) transitions of Tb 3+ ion. CaTbAl 3 O 7 :Sm 3+ under monitored 598 nm contains the excitation spectral peaks of both CaTbAl 3 O 7 and Sm 3+ ion. With excitation at 368 nm, CaTbAl 3 O 7 :Sm 3+ glows orange-red light, its PL spectrum has both host (CaTbAl 3 O 7 ) and Sm 3+ ion contributing, and the chromaticity coordinates are about (0.5499, 0.4351). Under excitation 402 nm, the red-orange emission of CaTbAl 3 O 7 :Sm 3+ is only the contribution of Sm 3+ ion and the chromaticity coordinates are about (0.5823, 0.4168). The energy transfer process from Tb 3+ in host (CaTbAl 3 O 7 ) to Sm 3+ ions can be confirmed via the spectral properties. We explain the luminous mechanism of CaTbAl 3 O 7 :Sm 3+ by the energy level diagrams of Tb 3+ and Sm 3+ .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhenyu Tang,Peichang Ouyang,Yunfang Liu
Plant greenhouse planting has aroused great attention to the development of plant growth light-emitting diode (LED) light source. Far-red emitting phosphors as the main component of plant growth LED lighting have been studied more and more widely. In this study, Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ with far-red emission for plant LED lighting is synthesized in air. X-ray diffractometer (XRD) with the energy dispersive spectroscopy (EDS) is used to test XRD patterns, EDS, and the element mapping diagrams, confirming that Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ has a hexagonal crystal structure of with pure phase Li 1.6 Mg 1.6 Sn 2.8 O 8 . Photoluminescence excitation (PLE) spectrum, time-resolved PL spectra, decay curves, photoluminescence (PL) spectrum, as well as concentration and temperature dependent PL spectra are investigated in detail. Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ under excitation at 305 nm shows far-red emission peaking at ∼702 nm due to the transition 4 T 1 ( 4 G) → 6 A 1 ( 6 S) of Fe 3+ ion in octahedron [FeO 6 ]. PL spectrum of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ matches with the absorption spectra of plants during the process of photosynthesis, indicating a promising application of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ in plant growth LED lighting. Time-resolved PL spectra prove the only luminescence center (Fe 3+ ). Concentration dependent PL spectra confirm the optimal Fe 3+ concentration (0.8 mol%) and the concentration quenching mechanism is analyzed. The temperature dependent PL spectra show good thermal stability of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ and the heat quenching mechanism is explained.
研究领域:
材料科学
·
园艺学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）