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
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光学
·
固体照明
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ying Li,Jia Liu,Xiwei Qi,Aihua Mao,YongHong Ma
A series of transparent (3- x ) Sr 3 Al 2 O 6 - x Sm 2 O 3 amorphous spheres were well fabricated using an aerodynamic levitation furnace with an x -value ranging from 0 to 0.065. In the visible light region, the maximum transmittance was approximately 80% for x = 0, 82% for x = 0.025 and 85% for x = 0.055. The excitation peak located at 405 nm was the strongest. The maximum intensity of the photoluminescence spectra appeared at 0.045. The chromatic coordinates of the CIE were all in the orange region.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2020
·
IF 2.187
Dan Zhao,Xiao-Qi Cui,Yan-Ping Fan,Bao-Zhong Liu,Jing Zhu,Ya-Li Xue
In this work, a series of K 3 Bi 1- x TaP 3 O 13 : x Sm 3+ ( x = 0.02–0.12) phosphors were synthesized using traditional high-temperature solid state reaction and their photoluminescence properties were studied. With 403 nm light excitation , three main peaks at 560–570 nm, 596–608 nm and 643–651 nm appeared, due to the 4 f →4 f characteristic transition of Sm 3+ . The best concentration of Sm 3+ ions doping is x = 0.06, and further increasing Sm 3+ will decrease the emission intensity because of concentration quenching effect. The decay curves of K 3 Bi 1- x TaP 3 O 13 : x Sm 3+ were recorded, showing decreasing luminescent lifetimes with increasing Sm 3+ concentrations. The CIE coordinates of K 3 Bi 0.94 TaP 3 O 13 :0.06Sm 3+ were (0.5515, 0.4455) corresponding to orange-red color. Furthermore, the phosphor had good thermal stability , retaining 86.9 % intensity at 200 ℃ of that at 25 °C. These results indicate that K 3 Bi 1- x P 3 O 13 : x Sm 3+ is a good orange-red phosphor for LED applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Noor Zamin Khan,Sayed Ali Khan,Weilong Chen,Abdul Jalil,Jahangeer Ahmed,Muhammad Amin Padhiar,Chen Li,Marcin Runowski,Ren-Kui Zheng
The high-temperature solid state reaction approach was used to successfully synthesize novel tunable-color emitting Ca 2 LuTaO 6 phosphors with double perovskite structure that were un-doped, single-doped, and co-doped with Bi 3+ /Sm 3+ ions. The crystal structure, microstructure, steady-state photoluminescence, time-resolved luminescence measurements, and thermal quenching features of the material were studied. The density functional theory method was used to compute the band gap of the Ca 2 LuTaO 6 , and Ca 2 LuTaO 6 : Bi 3+ , Sm 3+ phosphors. The blue emission at 407 nm (with 313 nm excitation) is due to the host's luminescence, while the cyan emission at 480 nm (under 365 nm excitation) is related to the distinctive 3 P n − 1 S 0 transitions (n = 0, 1, 2) of Bi 3+ . Similarly, efficient red emission is observed in the case of Sm 3+ single-doped Ca 2 LuTaO 6 phosphors. In addition, the Ca 2 LuTaO 6 : 0.04Bi 3+ , 0.05 S m 3+ phosphors exhibit energy transfer phenomena and have excellent thermal stability, the fluorescence intensity at 150 °C maintains 73% of that at 25 °C and has a small chromaticity shift. The intense blue emission at 407 nm was effectively converted to cyan, red, and white light through doping with Bi 3+ and Sm 3+ , and the resulting energy transfer. The results obtained confirm that Ca 2 LuTaO 6 : Bi 3+ , Sm 3+ phosphors as a single matrix have great potential for high-power WLED applications.
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 PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Tong Wu,Jingyao Li,Meiqi Chang,Yanhua Song,Qi Sun,Fangke Wang,Haifeng Zou,Zhan Shi
Dual functional Sm 3+ ion doped SiO 2 @TiO 2 composites were designed to investigate their luminescence properties and photocatalytic activities under ultraviolet and simulated solar light excitation, respectively. The TiO 2 :Sm 3+ nanoparticles , SiO 2 @TiO 2 :Sm 3+ nanospheres and SiO 2 @TiO 2 :Sm 3+ nanorods were successfully fabricated via the solvothermal method followed by the calcination at 700, 800 and 900 °C, respectively. The effects of morphology and calcination temperature on photocatalytic activities and luminescent properties were studied. The results demonstrated that the SiO 2 @TiO 2 :Sm 3+ nanorods calcined at 700 °C exhibited the highest luminescence intensities. This was attributed to possess the least specific surface area, which decreased the quenching center of surface defects , as well as without rutile phase. Moreover, SiO 2 @TiO 2 :Sm 3+ nanorods annealed at 800 °C were the optimum for improving the photodegradation efficiency of hydrolyzed polyacrylamide (HPAM) under simulated solar light irradiation. The degradation experiments results confirmed that the synergistic effect of the crystallinity/Ti–O–Si bond was the main reason for excellent photocatalytic activities. As a result, SiO 2 @TiO 2 :Sm 3+ nanorods meet our requirements for better photoluminescence intensities and photocatalytic activities.
研究领域:
材料科学
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光学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Renping Cao,Xuantian Wang,Yuming Jiao,Xun Ouyang,Siling Guo,Pan Liu,Hui Ao,Chunyan Cao
NaCa 2 Mg 2 V 3 O 12 :Sm 3+ phosphors are successfully prepared in air via solid-state reaction method. The crystal structures, concentration-dependent emission spectra , decay curves, and luminescence properties are investigated. The prepared samples have only a single phase (NaCa 2 Mg 2 V 3 O 12 ). The excitation spectrum of host (NaCa 2 Mg 2 V 3 O 12 ) monitored at 510 nm is observed in the region from 210 nm to 400 nm. The host (NaCa 2 Mg 2 V 3 O 12 ) with excitation at 340 nm shows a strong broadband green emission with a maximum at 510 nm in the range of 400–800 nm. The excitation spectrum of NaCa 2 Mg 2 V 3 O 12 :Sm 3+ phosphor monitored at 618 nm is shown in the region from 210 nm to 550 nm, which includes many absorption peaks. NaCa 2 Mg 2 V 3 O 12 :Sm 3+ phosphor with excitation at 340 nm displays the tunable emission color in the region from green to yellow light with changing Sm 3+ concentration, however, that with excitation at 406 nm only emits red light. The optimual Sm 3+ concentration is about 4 mol% in NaCa 2 Mg 2 V 3 O 12 :Sm 3+ phosphor. The lifetime of NaCa 2 Mg 2 V 3 O 12 :Sm 3+ phosphor decreases from 929.16 μs to 832.11 μs with increasing Sm 3+ concentration. The luminous mechanism of NaCa 2 Mg 2 V 3 O 12 :Sm 3+ phosphor is explained by the configurational coordinate diagram of VO 4 3− and energy level diagram of Sm 3+ ion. The experimental results are beneficial to the research of other Sm 3+ -doped luminescence materials.
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 RARE EARTHS
·
2023
·
IF 4.9
Biao Zhou,Xiangtong Zhang,Ranran Hu,Ruixue Hou,William W. Yu
Metal halide perovskites exhibit promising prospect in light-emitting diodes, solar cells, photodetectors and bioimaging. However, the workhorse of metal halide perovskites relies on toxicity lead element, which severely damages human body and environment. Among lead-free perovskites, Cs 2 NaInCl 6 double perovskite is one of the most promising candidates because of its great stability and easy synthesis, but suffers inadequate optical performance. Here, we doped Sb 3+ and Sm 3+ into Cs 2 NaInCl 6 nanocrystals by a hot injection method. Cs 2 NaInCl 6 :Sb 3+ exhibits blue emission at 447 nm. Cs 2 NaInCl 6 :Sm 3+ ,Sb 3+ nanocrystals simultaneously generate the blue emission of Sb 3+ and the multiple emissions of Sm 3+ at 565, 602, 650 and 710 nm. With the increase of Sm 3+ feed ratio, the emission color of Cs 2 NaInCl 6 :Sm 3+ ,Sb 3+ gradually moves to cold white region at (0.27, 0.28) in CIE chromaticity diagram and correlated color temperature of 11,840 K. This work shows the potential application of Cs 2 NaInCl 6 :Sm 3+ ,Sb 3+ nanocrystals as a single-component cold white emitter.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Xuemei Yao,Yifan Zhong,Junzhi Che,Jun Chen,Fanhua Zeng,Bin Deng,Ruijin Yu
Red phosphor based on Sm 3+ has a high potential application in displays and lighting. In this work, novel reddish-orange emitting phosphors were obtained by introduced Sm 3+ into the double-perovskite structure Sr 3 TeO 6 host lattice by solid-state reaction method. The phase composition and optical properties were discussed in detail. Through the X-ray diffraction (XRD) and Rietveld refinement analysis, the prepared Sr 3 TeO 6 :Sm 3+ phosphors presented the triclinic symmetry with the and space group Fm3m . The photoluminescent spectra reveal that The Sr 3 TeO 6 :Sm 3+ phosphors emit intense reddish-orange emission light at 652 nm ascribed to the 4 G 5/2 - 6 H 9/2 transition. Furthermore, the correlated color temperature (CCT) and color purity of Sr 3 TeO 6 : x Sm 3+ (0.01 ≤ x ≤ 0.30) are calculated using emission spectra . The optimum doped concentration is 2 mol%. The luminescence intensity remained at 87% at 480 K of its original value at 300 k. The red light-emitting diode (LED) is successfully fabricated based on Sr 3 TeO 6 :0.02Sm 3+ samples. The CIE coordinates of the fabricated white LED nearly overlaps with an equal energy point (0.333, 0.333) in the CIE 1931 color system. All results indicate that the Sr 3 TeO 6 :Sm 3+ phosphors can be applied in the white light-emitting diodes (W-LEDs) field.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2019
·Vol. 10
·期 21
·5452-5460
·
IF 9.556
Yu Gao,Renfu Li,Wei Zheng,Xiaoying Shang,Jiaojiao Wei,Meiran Zhang,Jin Xu,Wenwu You,Zhuo Chen,Xueyuan Chen
Near-infrared (NIR) photostimulated luminescence (PSL) nanocrystals (NCs) have recently evoked considerable interest in the field of biomedicine, but are currently limited by the controlled synthesis of efficient PSL NCs. Herein, we report for the first time the controlled synthesis of CaS:Eu2+,Sm3+ NIR PSL NCs through a high-temperature co-precipitation method. The role of Sm3+ co-doping and the effect of thermal annealing on the optical properties of the NCs as well as the charging and discharging processes, the trap depth distribution, and the underlying PSL mechanism are comprehensively surveyed by means of photoluminescence, persistent luminescence, thermoluminescence, and PSL spectroscopies. The as-prepared NCs exhibit intense PSL of Eu2+ at 650 nm with a fast response to stimulation in a broad NIR region from 800 nm to 1600 nm, a duration time longer than 2 h, and an extremely low power density threshold down to 10 mW cm−2 at 980 nm. Furthermore, by taking advantage of the intense NIR PSL, we demonstrate the application of CaS:Eu2+,Sm3+ NCs as sensitive luminescent nanoprobes for biotin receptor-targeted cancer cell imaging. These results reveal the great promise of CaS:Eu2+,Sm3+ nanoprobes for autofluorescence-free bioimaging, and also lay the foundation for future design of efficient NIR PSL nanoprobes towards versatile bioapplications.
研究领域:
材料科学
·
生物医学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·14128-14136
·
IF 2.478
Song Fengmin,Zhang Gongguo
A series of double-perovskite orange–red-emitting Ca (3−2 x ) Sm x Na x TeO 6 ( x = 0.01–0.25) phosphors have been synthesized via high-temperature method. The single-phase and orthorhombic structure of Ca 3 TeO 6 :Sm 3+ , Na + phosphors was confirmed by X-ray powder diffraction. Under 405 nm excitation, Ca 3 TeO 6 :Sm 3+ , Na + phosphors emitted a series of orange–red emission due to the transition of Sm 3+ from 4 G 5/2 to 6 H J/2 ( J = 5, 7, 9, and 11). The optimal Sm 3+ -doping concentration of Ca (3−2 x ) Sm x Na x TeO 6 ( x = 0.01–0.25) was x = 0.10. The thermal-quenching temperature of Ca 3 TeO 6 :0.10Sm 3+ , 0.10Na + phosphor was above 480 K. A white light-emitting diode (w-LED) based on 410 nm UV chip was successfully fabricated, and it presented a good correlated color temperature and a high color-rendering index (R a ). Therefore, orange–red-emitting Ca 3 TeO 6 :Sm 3+ , Na + phosphors have potential applications in UV-based w-LEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 31
·15192-15199
·
IF 3.925
Zhihui Rao,Zhilin Li,Xiujian Zhao,Xiao Gong
Cs2AgInCl6 lead-free double perovskites are environmentally benign with easily modulated fluorescence. However, their wide band gap (∼3.3 eV) and forbidden optical transitions limit their visible application. Herein, we prepared Cs2AgInCl6 microcrystals (MCs) and corresponding doped samples (bismuth: Bi3+, samarium: Sm3+, and Bi3+–Sm3+) to achieve such a functionality by a precipitation method at low temperature (80 °C). Bi3+-doped Cs2AgInCl6 MCs introduce 1S0 to 1P1 absorption with a fluorescence enhancement at lower excitation energy (370 nm). Although the f–f transition of Sm3+ is parity forbidden, Bi3+–Sm3+ co-doped Cs2AgInCl6 MCs show a combination of luminescence in the visible range with two sharp additional spectral features at 567 and 600 nm, which are attributed to the 4G5/2 → 6H5/2 (∼567 nm) and 4G5/2 → 6H7/2 (∼600 nm) transitions of Sm3+ ions. We proposed a mechanism in which Cs2AgInCl6:Bi–Sm MCs achieve mutual enhancement of fluorescence through recombination of self-trapped excitons and energy-transfer transitions. Moreover, thermogravimetric (TG) analysis indicated that the materials have remarkable thermal stability. Afterwards, light-emitting diodes (LEDs) with bright yellow light were fabricated by combining Cs2AgInCl6:Bi–Sm MCs with a 365 nm chip, and the corresponding color coordinate is about (0.535, 0.440) with a 2000 K correlated color temperature (CCT).
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yiwei Wang,Yue Li,Yongbo Ma,Yachong Liu,Haolin Lu,Huanxin Yang,Wenda Sun,Xiangxiang Chen,Wei Xiong,Libing Zhang,Xiyan Li
Lead-free halide perovskites are highly appealing for optoelectronic applications due to their non-toxic nature and exceptional optical properties. In this study, we report the co-doping of Sb 3+ and Sm 3+ in the rare-earth-based double perovskite Cs 2 NaGdCl 6 . The incorporation of Sb 3+ ions effectively tunes the electronic structure, achieving a photoluminescence quantum yield (PLQY) of up to 87.9 %. The Sb 3+ /Sm 3+ -co-doped Cs 2 NaGdCl 6 exhibits excitation wavelength-dependent emission characteristics, transitioning from blue emission under 260 nm excitation to white emission under 365 nm excitation. Furthermore, the Sb 3+ /Sm 3+ -co-doped Cs 2 NaGdCl 6 material demonstrates advanced multifunctional applications in light-emitting diode (LED) lighting and fluorescence anti-counterfeiting technologies. These findings hold significant implications for the utilization of rare-earth-based double perovskites in optoelectronic devices.
研究领域:
材料科学
·
光学
·
电子工程
✓ 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）