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 ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Changyan Ji,Zhi Huang,Xiuying Tian,Hengping He,Jin Wen,Yangxi Peng
A series of red emitting phosphors Mg 3 Y 2-x Ge 3 O 12 :xSm 3+ (0≤x ≤ 0.06) were successfully synthesized. Samples Mg 3 Y 2-x Ge 3 O 12 :Sm 3+ exhibited a cubic structure pertaining to the I a-3d (230) space group and the particle sizes range from 1 μm to 5 μm. The optical properties displayed that the optimum doping concentration of Sm 3+ is 4%. The phosphor Mg 3 Y 1.96 Ge 3 O 12 :0.04Sm 3+ not only exhibited a broad band gap of 5.54 eV but also showed a high color purity of 97.6%. In addition, the strongest emission intensity located at 566 nm belonged to the 4 G 5/2 → 6 H 5/2 transition when excited at 405 nm. Thermal quenching test revealed that the sample Mg 3 Y 1.96 Ge 3 O 12 :0.04Sm 3+ are excellent powders with splendid thermal stability, in which only 3.6% of the PL intensity is quenched at 473 K in comparison with that of 298 K. As a result, the W-LEDs based on Mg 3 Y 1.96 Ge 3 O 12 :0.04Sm 3+ yielded a high R a of 91.1, a low CCT of 4881 K, and CIE coordinates of (0.3476, 0.3466) in a 20 mA driven current. This research work provided important guidance for the synthesis of Sm 3+ doped red component with excellent luminesce properties and high thermal stability characteristics used in W-LEDs.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYHEDRON
·
2025
·
IF 2.6
Yifeng Liu,Yifei Liu,Meihua Wu,Yuena Jiang,Zhaohui Huang,Xin Min,Ruiyu Mi
Red phosphors with good luminescent properties have attracted widespread attention because they can satisfy the lighting requirement of white LEDs (Light Emitting Diode) preferably. K 2 ZnP 2 O 7 : Eu 3+ powder with a stable structure was successfully synthesized via the high-temperature solid-state method, involving a two-step process: pre-sintering at 450 °C for 12 h followed by sintering at 650 °C for 8 h. Under the excitation of 394 nm near ultraviolet light, the phosphor produces bright red emission. The highest emission peak of the K 2 Zn (1–1.5x) P 2 O 7 : xEu 3+ (x = 0.1) phosphor is located at 595 nm ( 5 D 0 → 7 F 1 ), followed by the red emission peak at 612 nm ( 5 D 0 → 7 F 2 ). When the temperature reaches 150 °C, the emission integral intensity of K 2 ZnP 2 O 7 : 0.1Eu 3+ remains 91.1% of that at room temperature (ΔE = 0.1946 eV), which proves that K 2 ZnP 2 O 7 : Eu 3+ has good thermal stability. In addition, the CIE (International Commission on Illumination) coordinates of the white LED packaged by K 2 ZnP 2 O 7 : 0.1Eu 3+ are (0.3312,0.3578), and the CCT (Correlated Color Temperature) and CRI (Color Rendering Index) of the LED lamp are 5765 K and 87.6, respectively. This indicates that K 2 ZnP 2 O 7 :Eu 3+ is promised as a red-emitting phosphor for white LED excited by near-ultraviolet chips.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Xiaoman Li,Ruijin Fan,Pengfei Zhai,Xinyu Liu,Huijun Liu,Shitong Xu,Rongfei Wei,Hai Guo
The demands for white-light-emitting materials are becoming more and more rigorous. In this work, a novel kind of Sn 2+ /Mn 2+ doped phosphate aluminum calcium glass was fabricated by a traditional melt-quenching technique. Broadband excitation and emission of Sn 2+ ions were detected in Sn 2+ single-doped glass samples. By the modulation of excitation wavelength, tunable broadband cyan-blue light emissions of Sn 2+ were also realized. Combined with the red light emitting of Mn 2+ ion, a nearly white light with a good chromaticity coordinate (0.339, 0.298) and a relatively low correlated color temperature (CCT) of 5107 K were obtained in Sn 2+ /Mn 2+ codoped glasses due to the energy transfer process from Sn 2+ to Mn 2+ ions. In addition, after two cycles of heating and cooling treatment, the emission intensity of Sn 2+ doped glass sample remained 97.9% of the initial emission intensity at 300 K. All of these results reveal that these Sn 2+ /Mn 2+ doped aluminum calcium phosphate glasses have good resistance to thermal impacts and have prospects in white-light-emitting diodes (W-LEDs) fields.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2026
·Vol. 100
·期 2
·262-268
·
IF 0.7
Ying Lin,Gao Teng,Huang Guobin,Liu Mengli,Cao Qinyu,Zhuang Naifeng,Chen Wenjie
A series of Sm 3+ -doped CaGdAlO 4 (CGA) phosphors were successfully synthesized via a high-temperature solid-state method. The crystal structure and luminescent properties of the samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and fluorescence spectrometry, with Rietveld refinement confirming a tetragonal crystal structure (consistent with observed XRD patterns).The CGA:0.02Sm 3+ phosphor can be efficiently excited by blue-violet light (408 nm), emitting intense orange-red luminescence. The optimal Sm 3+ doping concentration is 2 mol % (maximum luminous intensity), and the concentration quenching mechanism is attributed to dipole-dipole interactions. The optimal sample exhibits excellent thermal stability in the range of 298–523 K, with an activation energy of 0.11 eV. When used as a red component in white LED (w-LED) devices, CGA:0.02Sm 3+ delivers outstanding performance: a high color rendering index (Ra = 91.2) and CIE chromaticity coordinates of (0.3148, 0.3488), indicating its potential as an orange-red phosphor for lighting and display applications. Additionally, first-principles calculations based on density-functional theory (DFT) were performed to investigate the electronic structures and density of states of pure CGA and Sm 3+ -doped CGA.
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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
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Xinjing Xie,Yangyang Tuo,Siyu Cheng,Di Gao,Mengkun Zhang,Xiang Liu,Huajuan Deng,Ruijin Yu
The novel Dy 3+ -doped NaMgLaTeO 6 (NaMgLaTeO 6 :Dy 3+ ) phosphors were produced through a high-temperature solid-state reaction. X-ray diffraction (XRD) analysis and Rietveld refinement manifest that the pure phosphor was committed to the space group (P2 1/m (11)) and features the double perovskite structure. The band gap ( E g ) of the direct semiconductor NaMgLaTeO 6 is calculated to be 2.065 eV. Under 388 nm excitation, the 4 F 9/2 → 6 H 13/2 energy level transition contributes to the maximum emission peak at 572 nm. Other properties of the phosphor include optimal concentration ( x = 5 mol %), high thermal stability, activation energy ( E a = 0.31 eV), and internal quantum efficiency (IQE = 31.44 %). The relevant color coordinate of the white light emitting diode (w-LED) prepared by the phosphor is (0.298, 0.311). The features of the latent fingerprint (LFP) created by NaMgLaTeO 6 :Dy 3+ can be clearly reflected on different surfaces. In summary, NaMgLaTeO 6 :Dy 3+ phosphor has proven high potential in w-LEDs production and LFP detection.
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
·
2021
·
IF 4.527
Bingjie Han,Jing Ren,PingPing Teng,JiaBao Zhu,Yu Shen,ZhiAng Li,Xiaoliang Zhu,Xinghua Yang
At present, the combination of red, green and blue light (RGB) is one of the mainstream ways to obtain high-efficiency white light emitting diodes (w-LEDs). In this paper, we have prepared a new type of Sm 3+ activated Ca 2 LaSbO 6 (CLSO) orange-red phosphor by the high-temperature solid-phase method. The phase and morphology of the powders were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. The luminescent properties, thermal stability of the materials have been tested and analyzed in detail. The results show that CLSO:Sm 3+ phosphors have several excitation bands in the range of 320–550 nm, and the excitation peak intensity at 405 nm is the largest, indicating that the material can be excited by blue light. The emission peak is composed of 564 nm (yellow), 601 nm (orange) and 648 nm (red), emission intensity reaches the extreme value when the Sm 3+ doping concentration is 5 mol%, the quenching phenomenon is due to the dipole-dipole (d-d) interaction of Sm 3+ ions. The activation energy ( E a ) of Sm 3+ in CLSO is 0.2689 eV. The CIE chromaticity coordinates of CLSO:Sm 3+ located at origin-red region. All results show that CLSO:Sm 3+ phosphor has potential application value in w-LEDs field.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Lei Yanhua,Zhang Anlin,Li Dongdong,Li Feng,Sun Huapeng,Deng Bin
A series of newly synthesized red-emitting phosphors, La 3 Ga 5 SnO 14 :Eu 3+ , were produced through high-temperature solid-state synthesis methods. The phase purity, particle morphology and optical properties were systematically investigated in this work. The prepared fluorescent material has high phase purity. La 3 Ga 5 SnO 14 :Eu 3+ has a strong red emission peak at 612 nm at the excitation at 268 nm, which is caused by the radiative transitions of electrons ( 5 D 0 → 7 F 2 ). The optimal doping concentration of Eu 3+ was observed to be 30 mol% in this series of La 3 Ga 5 SnO 14 :Eu 3+ . The mechanism of concentration quenching was determined to be dipole-quadrupole interaction. The chromaticity coordinates of La 3 Ga 5 SnO 14 :30 mol%Eu 3+ were (0.648, 0.352) with a corresponding high color purity of 100%. The thermal stability of the phosphor was also characterized. The luminous intensity could be sustained at 54% at 480 K. The quantum efficiency of the La 3 Ga 5 SnO 14 :30 mol%Eu 3+ phosphor is 64.4%. The exhaustive findings from this study form the basis for advocating the application of these phosphors in light-emitting devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Xiaoman Li,Xinyu Liu,Pengfei Zhai,Ruijin Fan,Rongfei Wei,Hai Guo
The demand for white-light luminescent materials for the white-light-emitting diodes (W-LEDs) field has been growing in modern life. In this work, a series of Sn 2+ and Mn 2+ ions co-doped highly transparent white-light emitting oxyfluoride glasses (precursor glass, PG) and Sr 2 LuF 7 glass-ceramics (GC) were successfully prepared by the melt-quenching technique. Their luminescent and structural properties were investigated by the transmission spectra, excitation and emission spectra at different temperatures (300-500 K), luminescent decay curves, XRD, and TEM characterizations. Upon excitation with ultraviolet (UV) light, tunable broadband blue-white light emissions of Sn 2+ were obtained by adjusting the concentration of Sn 2+ ions. A conspicuous energy transfer process from Sn 2+ to Mn 2+ was observed in Sn 2+ /Mn 2+ co-doped samples. Tunable broadband luminescence between blue-white light and orange-red light regions and nearly pink-white light emission was realized by varying Mn 2+ concentration. Furthermore, compared to PG samples, the emissions were enhanced in GC samples due to the crystallization of Sr 2 LuF 7 nanocrystals. Excellent thermal stability was also performed in these Sn 2+ doped PG and GC samples with a recovering value of 96 % and 98.8 %, respectively. Simultaneously, Sn 2+ doped PG and GC samples also own good optical thermal sensitivities with an S A value of 2.28 % and 2.47 % K - 1 , respectively. Our results indicate that these Sn 2+ /Mn 2+ co-doped PG and GC may serve as tunable light sources under UV excitation and have prospects on the ratiometric optical thermometry fields.
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
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Xiaopeng Hu,Anlin Zhang,Yufeng Du,Li Zhou,Changlin Li,Jingjing Lian,Zhequan Zou,Xuan Ouyang,Bin Deng,Lianwu Xie,Ruijin Yu
A novel layered perovskite tantalate phosphor Sr 3 LaTa 3 O 12 :Sm 3+ (SLTO:Sm 3+ ) with orange-red emission was obtained for the first time via the solid-phase synthetic method. The phase purity, surface morphology , element distribution and luminescent properties of the SLTO: x Sm 3+ ( x = 0.01 mol%–0.30 mol%) phosphors were investigated. Under 408 nm excitation, the optimum doped SLTO:0.10Sm 3+ phosphor emits orange-red light at 598 nm with the highest emission peak ( 4 G 5/2 → 6 H 7/2 ). The critical energy transfer distance is 1.687 nm. The prepared SLTO:0.10Sm 3+ phosphor has excellent thermal stability with temperature quenching temperature ( T 0.5 > 500 K) and high activation energy ( E a = 0.25 eV). Through calculation, the chromaticity coordinates of all samples are concentrated in the orange-red area, and the color purity reaches 99%. The fabricated white light-emitting diode (w-LED) has a good correlated color temperature (5132 K), a high R a (89), and the CIE chromaticity coordinates (0.340, 0.327). Consequently, the superiority of orange-red-emitting tantalate SLTO:Sm 3+ phosphors for w-LEDs is demonstrated.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 20
·1-10
·
IF 2.8
Ji Changjian,Zhang Hailong,Wang Wenjing,Yuan Huimin,Zhao Gang
In order to acquire a red light-emitting component for an efficient w -LEDs device, we synthesized a series of Eu 3+ -doped Sr 2 GaTaO 6 (SGT) phosphors using a traditional high-temperature solid-phase technique. The results of UV diffuse reflectance proved that the SGT host possesses a broad optical energy bandgap ( E gap ) of 4.47 eV (calculated value). The relevant characteristic spectra were also tested. By monitoring the emission at 612 nm, the excitation peak at 466 nm matches the blue light region (460–470 nm) of the popular blue LED chips on the market. The photoluminescence (PL) spectra of SGT: Eu 3+ phosphors at room temperature consisting of four obvious PL bands ( 5 D 0 → 7 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 , and 5 D 0 → 7 F 4 ) in the visible range. And the PL properties are necessarily analyzed by fluorescence decay curves. And it exhibits a decent photoluminescence quantum yield (39.88%). Moreover, the color purity and the ∆E of the SGT: 0.2Eu 3+ sample are 96.5% and 0.29 eV, respectively, demonstrating that the ∆E of SGT: Eu 3+ phosphor is superior to other reported Eu 3+ -doped materials for w -LEDs applications. The results manifest that the Eu 3+ doped SGT phosphors can be outstanding candidates for w -LEDs applications with high color purity and activation energy.
研究领域:
材料科学
·
光电
·
固体化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）