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学者姓名：郭飞云
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Abstract ：
高效和热稳定的红色荧光粉能够有效改善荧光粉转换型白光发光二极管的性能.采用高温固相反应法制备了一系列新型的NaLaCaTeO6∶xEu3+荧光粉.在395 nm激发下,NaLaCaTeO6∶Eu3+样品呈现出Eu3+的特征跃迁峰.通过[Na+-La3+]取代[Ca2+-Ca2+]离子对的共取代策略,NaLaCaTeO6中 Eu3+的最佳掺杂浓度提高至60％(摩尔分数),该荧光粉的色纯度和内量子效率分别高达99.87％和67.6％.另外,该荧光粉的发光强度和热稳定性比取代前的Ca3TeO6∶0.2Eu3+样品也有明显提升,在420K时的发射强度仍保持在300K时的91.7％.所制备的白光LED显色指数Ra为80.6,CIE色度坐标为(0.3176,0.3340),表明所制备的NaLaCaTeO6∶0.6Eu3+红色荧光粉在固态照明中具有广泛的应用前景.
Keyword ：
共取代 共取代 发光 发光 热稳定性 热稳定性 荧光粉 荧光粉
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| GB/T 7714 | 赵兵 , 茹晶晶 , 郭飞云 et al. 共取代策略增强NaLaCaTeO6∶Eu3+的发光性能及在白光发光二极管中的应用 [J]. | 硅酸盐学报 , 2025 , 53 (2) : 257-266 . |
| MLA | 赵兵 et al. "共取代策略增强NaLaCaTeO6∶Eu3+的发光性能及在白光发光二极管中的应用" . | 硅酸盐学报 53 . 2 (2025) : 257-266 . |
| APA | 赵兵 , 茹晶晶 , 郭飞云 , 郭诗莹 . 共取代策略增强NaLaCaTeO6∶Eu3+的发光性能及在白光发光二极管中的应用 . | 硅酸盐学报 , 2025 , 53 (2) , 257-266 . |
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Introduction Amid the growing emphasis on energy conservation and environmental protection, designing phosphors with multifunctional applications has become an urgent challenge. The traditional approach of combining blue light-emitting diode (LED) chips with yellow phosphors to produce white light suffers from drawbacks such as low color rendering index (CRI) and high color temperature. To address the pressing demands of lighting and display technologies, developing high-efficiency red phosphors that can be excited by near-ultraviolet (near-UV) light is crucial for applications in white LEDs and flexible display technologies. Building upon the garnet-like structure of Ca3Zn3(TeO6)2, a series of CaNaLaZn3(TeO6)2:xEu3+ (CNLZT:xEu3+) red phosphors, capable of being effectively excited by near-UV light, were designed and synthesized using a chemical unit co-substitution strategy. In this approach, the [Na+−La3+] ion pair replaces the [Ca2+−Ca2+] ions. This co-substitution significantly enhances the luminescence properties of the CNLZT:0.15Eu3+ sample. White LED devices fabricated with this material exhibit excellent luminous performance and stability. Moreover, the CNLZT:0.15Eu3+/polydimethylsiloxane (PDMS) flexible film demonstrates promising luminance, making it well-suited for applications in flexible display technologies. Methods A series of CNLZT:xEu3+ red phosphors were synthesized using a high-temperature solid-state reaction method. Raw materials were accurately weighed according to stoichiometric ratios and thoroughly ground in an agate mortar for 25 min. The resulting mixture was loaded into alumina crucibles and sintered for 10 h in an air atmosphere at 1323 K. After cooling, the samples were reground to obtain fine powders. The prepared CNLZT:0.15Eu3+ red phosphor was then mixed with BaMgAl10O17:Eu2+ (BAM:Eu2+, blue) and (Ba,Sr)2SiO4:Eu2+ (BSS:Eu2+, green) in a specific mass ratio. This mixture, along with ZWL8820 organic silicone gel, was applied to a 395 nm near-UV chip and encapsulated to fabricate a white LED device. Additionally, a CNLZT:0.15Eu3+/PDMS flexible film was prepared by combining the CNLZT:0.15Eu3+ phosphor with PDMS in a predetermined mass ratio and cutting it to the desired size for subsequent testing. Results and discussion X-ray diffraction (XRD) analysis and Rietveld structural refinements reveal that substituting [Ca2+–Ca2+] ion pairs with [Na+–La3+] does not alter the matrix structure. The Eu3+ replace La3+ in the matrix, causing lattice contraction and a slight shift in XRD diffraction peaks toward higher angles. The main absorption peak at 394 nm aligns well with the near-UV LED chip. When x=0.15, the luminescence intensity of the optimal sample CNLZT:0.15Eu3+ reaches its maximum, 1.135 times higher than the commercial red phosphor Y2O3:Eu3+ and 1.908 times greater than the pre-substitution Ca3Zn3(TeO6)2:0.12Eu3+. The color purity is 99.78%, and the CIE color coordinates are (0.649 2, 0.350 4), close to the ideal red light point (0.670, 0.330), demonstrating excellent red luminescence. This confirms that the chemical unit co-substitution strategy effectively enhances luminescence properties. At elevated temperatures, the CNLZT:0.15Eu3+ sample exhibits good color stability. The packaged white LED device has a correlated color temperature (CCT) of 6414 K and a CRI (Ra) of 87.3. Its CIE coordinates (0.314 9, 0.325 0) lie in the white light region. Even after 100 minutes of continuous operation at 50 mA, the white LED maintains stable performance and luminescence. Furthermore, the CNLZT:0.15Eu3+/PDMS film remains intact and efficiently luminescent after bending tests, demonstrating potential for flexible display applications. Conclusions A series of CNLZT:xEu3+ red phosphors, excitable by near-UV light, were synthesized using a high-temperature solid-state reaction method. By employing the chemical unit co-substitution strategy of [Na+−La3+] replacing [Ca2+−Ca2+], the optimized doping concentration of Eu3+ in the CNLZT matrix was effectively elevated to 15% (in mole). The luminous intensity of the CNLZT:0.15Eu3+ sample is 1.908 times that of the pre-substitution Ca3Zn3(TeO6)2:0.12Eu3+ sample and 1.135 times that of the commercial Y2O3:Eu3+. The color purity of the CNLZT:0.15Eu3+ sample is 99.78%, and its color coordinates (0.649 2, 0.350 4) are close to the ideal red point (0.670, 0.330). The chemical unit co-substitution strategy effectively regulates the luminescent properties. Temperature-dependent fluorescence spectroscopy confirms that CNLZT:0.15Eu3+ possesses excellent color stability, with a chromaticity shift of only 0.008 52 at 420 K. The packaged white LED achieves CIE coordinates of (0.314 9, 0.325 0) with a CRI (Ra) of 87.3, demonstrating precise color rendering and stable performance after 100 min of continuous operation at 50 mA. Moreover, the CNLZT:0.15Eu3+/PDMS flexible film shows promising luminance, making it suitable for applications in flexible display technologies. © 2025 Chinese Ceramic Society. All rights reserved.
Keyword ：
Crystallites Crystallites Flexible displays Flexible displays Liquid crystals Liquid crystals Luminescence of gases Luminescence of gases Luminescence of inorganic solids Luminescence of inorganic solids Luminescence of organic solids Luminescence of organic solids Phosphorescence Phosphorescence Phosphors Phosphors Photoluminescence Photoluminescence Pixels Pixels Pressing (forming) Pressing (forming) Scintillation Scintillation Thermoluminescence Thermoluminescence Triboluminescence Triboluminescence
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| GB/T 7714 | Ru, Jingjing , Zhao, Bing , Xu, Yuanyi et al. Regulation of Luminescence Property and Application of CaNaLaZn3(TeO6)2:Eu3+ Phosphor [J]. | Journal of the Chinese Ceramic Society , 2025 , 53 (5) : 1066-1077 . |
| MLA | Ru, Jingjing et al. "Regulation of Luminescence Property and Application of CaNaLaZn3(TeO6)2:Eu3+ Phosphor" . | Journal of the Chinese Ceramic Society 53 . 5 (2025) : 1066-1077 . |
| APA | Ru, Jingjing , Zhao, Bing , Xu, Yuanyi , He, Jiaxin , Guo, Feiyun . Regulation of Luminescence Property and Application of CaNaLaZn3(TeO6)2:Eu3+ Phosphor . | Journal of the Chinese Ceramic Society , 2025 , 53 (5) , 1066-1077 . |
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Introduction As a high-quality light source, the performance of phosphor-converted white light emitting diodes (pc-WLEDs) is closely related to the performance of the selected luminescent materials. The traditional method of combining blue LED chips and yellow phosphors to generate white light has problems of low color rendering index and high color temperature. To address the pressing requirements of lighting and display technologies, the development of novel red phosphors with high efficiency and excellent thermal stability is urgent. Perovskite tellurites have attracted extensive attention due to their elemental diversity and structural tunability. Based on the double perovskite Ca3TeO6, a series of NaLaCaTeO6:xEu3+ phosphors that can be effectively excited by near-ultraviolet light have been designed and synthesized by elemental design. Through a co-substitution strategy of [Na+–La3+] substitution of [Ca2+–Ca2+] ion pair, the problem of low Eu3+ doping concentration in Ca3TeO6:Eu3+ is effectively improved by regulating the matrix structure. Meanwhile, the luminous intensity and thermal stability of the sample were also significantly improved. Methods Series of NLCT:xEu3+ (0.05 ≤ x ≤ 1.0) samples were successfully synthesized by a high-temperature solid-state reaction. The stoichiometric amounts of raw materials, including Na2CO3 (105.99 g/mol, 99.9%), CaCO3 (100.09 g/mol, 99.9%), TeO2 (159.6 g/mol, 99.99%), La2O3 (325.84 g/mol, 99.99%) and Eu2O3 (351.93 g/mol, 99.99%) purchased from Shanghai Aladdin Biochemical Technology Co., Ltd., were weighed and grounded into homogeneous powder for 30 min. Afterward, the obtained powder was put into crucibles and heated at 1473 K for 12 h in a muffle furnace. Eventually, the target substances were obtained after cooling down and grinding again. A red LED device was assembled using the NLCT:0.6Eu3+ phosphor with a 395 nm chip. The WLED device was fabricated by connecting tricolor phosphors including BaMgAl10O17:Eu2+ (BAM:Eu2+, blue), (Ba, Sr)2SiO4:Eu2+ (BSS:Eu2+, green), along with the prepared NLCT:0.6Eu3+ (red) with a 395 nm chip. Results and discussion The results of XRD patterns showed that [Na+–La3+] substituted the [Ca2+–Ca2+] ion pair, which did not affect the structure of the sample. The diffraction peaks of the samples with x = 0.1–0.6 did not show obvious impurity peaks, indicating that the synthesized samples were pure phases. Eu3+ ions tended to occupy the site of La in the matrix rather than Te. DRS results also confirmed that Eu3+ ions were successfully introduced into the NLCT matrix. The dominant absorption peak at 395 nm matches well with InGaN-based LED, and the emission intensity reaches the maximum at x = 0.6. The primary mechanism among Eu3+ ions in NLCT:xEu3+ samples was proved to the dipole-dipole interaction. The luminous intensity of the prepared NLCT:0.6Eu3+ red phosphor is about 1.98 and 3.97 times than that of CT:0.2Eu3+ and Y2O3:Eu3+, confirming the feasibility of the co-substitution strategy. The internal quantum yield and color purity of NLCT:0.6Eu3+ are 67.6% and 99.87%, respectively. The CIE color coordinates of this sample (0.658 1, 0.341 0) are closer to the ideal red point (0.670, 0.330) than that of the purchased commercial red phosphor Y2O3:Eu3+. Compared with CT:0.2Eu3+ (about 77.5%), the thermal stability of NLCT:0.6Eu3+ is significantly improved. When the temperature rises to 420 K, the emission intensity at 616 nm remains 91.7% of that at 300 K. Furthermore, the sample exhibits excellent color stability by the CIE coordinates shifting only slightly from (0.658 2,0.340 8) to (0.646 6,0.351 9) with increasing temperature. The CCT and Ra of the prepared WLED device are 6215 K and 80.6, respectively, and the CIE coordinates (0.317 6, 0.334 0) are located in the white light region. Conclusions A series of innovative NaLaCaTeO6:xEu3+ phosphors were synthesized using a high temperature solid-state reaction method. Under 395 nm excitation, the NaLaCaTeO6:Eu3+ samples exhibit a strong red emission at 616 nm (5D0→7F2) of Eu3+ ions. Through a co-substitution strategy where [Na+–La3+] replaced the [Ca2+–Ca2+] ion pair, the optimized doping concentration of the NaLaCaTeO6:xEu3+ is elevated to 60% (molar fractior), leading to exceptional color purity and high internal quantum efficiency reaching 99.87% and 67.60%, respectively. Furthermore, compared to the Ca3TeO6:0.2Eu3+ sample pre-substitution, the luminous intensity and thermal stability of NaLaCaTeO6:0.6Eu3+ phosphor witness a notable increase. Even at 420 K, the emission intensity remains at 91.7% compared to 300 K. The resultant WLED displays a color rendering index Ra of 80.6 and CIE chromaticity coordinates of (0.317 6, 0.334 0), underscoring the broad application potential of NaLaCaTeO6:0.6Eu3+ in solid-state lighting. © 2025 Chinese Ceramic Society. All rights reserved.
Keyword ：
Bioluminescence Bioluminescence Fluorescent lamps Fluorescent lamps Lanthanum oxides Lanthanum oxides Luminescence of inorganic solids Luminescence of inorganic solids Luminescence of organic solids Luminescence of organic solids Phosphorescence Phosphorescence Phosphors Phosphors Photoluminescence Photoluminescence Pressing (forming) Pressing (forming) Scintillation Scintillation Tellurium compounds Tellurium compounds Thermoluminescence Thermoluminescence Triboluminescence Triboluminescence
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| GB/T 7714 | Zhao, Bing , Ru, Jingjing , Guo, Feiyun et al. Co-substitution Strategy to Improve the Luminescence Property of NaLaCaTeO6:Eu3+ Phosphor and Its Application in White Light Emitting Diode [J]. | Journal of the Chinese Ceramic Society , 2025 , 53 (2) : 257-266 . |
| MLA | Zhao, Bing et al. "Co-substitution Strategy to Improve the Luminescence Property of NaLaCaTeO6:Eu3+ Phosphor and Its Application in White Light Emitting Diode" . | Journal of the Chinese Ceramic Society 53 . 2 (2025) : 257-266 . |
| APA | Zhao, Bing , Ru, Jingjing , Guo, Feiyun , Guo, Shiying . Co-substitution Strategy to Improve the Luminescence Property of NaLaCaTeO6:Eu3+ Phosphor and Its Application in White Light Emitting Diode . | Journal of the Chinese Ceramic Society , 2025 , 53 (2) , 257-266 . |
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在节能环保的大背景下,构建具有多功能应用的荧光粉已成为迫在眉睫的挑战.采用高温固相法制备了系列能够被近紫外光有效激发的CaNaLaZn3(TeO6)2:xEu3+红色荧光粉.利用[Na+-La3+]离子对取代[Ca2+-Ca2+]的化学单元共取代策略,将CaNaLaZn3(TeO6)2 基质中Eu3+的最佳掺杂浓度有效提高至 15%(摩尔分数),最佳样品CaNaLaZn3(TeO6)2:0.15Eu3+的发光强度提升至取代前Ca3Zn3(TeO6)2:0.12Eu3+样品的 1.908 倍,且为商用Y2O3:Eu3+发光强度的 1.135倍,该样品的色纯度为 99.78%,色坐标为(0.649 2,0.350 4),更接近理想红光点(0.670,0.330),证实了化学单元共取代策略能够有效调控样品的发光性能.变温荧光光谱测试表明,该荧光粉具有良好的颜色稳定性,420 K时,其色度偏移仅为0.008 52.所封装的白光LED色坐标为(0.314 9,0.325 0),显色指数 Ra 为 87.3,该器件在 50 mA 电流下连续工作 100 min,仍能保持良好的性能;所制得的CaNaLaZn3(TeO6)2:0.15Eu3+/聚二甲基硅氧烷柔性薄膜具有良好的发光性能,适合用于柔性显示技术.
Keyword ：
共取代 共取代 发光 发光 热稳定性 热稳定性 荧光粉 荧光粉
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| GB/T 7714 | 茹晶晶 , 赵兵 , 许元艺 et al. CaNaLaZn3(TeO6)2:Eu3+发光性能的调控及应用 [J]. | 硅酸盐学报 , 2025 , 53 (5) : 1066-1077 . |
| MLA | 茹晶晶 et al. "CaNaLaZn3(TeO6)2:Eu3+发光性能的调控及应用" . | 硅酸盐学报 53 . 5 (2025) : 1066-1077 . |
| APA | 茹晶晶 , 赵兵 , 许元艺 , 何嘉欣 , 郭飞云 . CaNaLaZn3(TeO6)2:Eu3+发光性能的调控及应用 . | 硅酸盐学报 , 2025 , 53 (5) , 1066-1077 . |
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Two novel phosphors LiBa4(1-x)Eu4xTa3O12(H-LBTO∶xEu3+)and Li0.25Ba1-xEuxTa0.75O3(C-LBTO∶xEu3+)were prepared successfully by a molten salt method.The transformation between these two structures was realized by changing the sintering temperature or changing the Eu3+ions concentration,which was also demonstrated by the X-ray diffraction(XRD),scanning electron microscopy(SEM),diffuse reflec-tance spectra(DRS),and photoluminescence excitation(PLE)analyses.Both the sintering temperature and the Eu3+ions doping concentration have significant impact on the formation of the crystal phase.All these phosphors sintered at 1023 K exhibit two major luminescence lines at 594 and 614 nm under near-UV light of 395 nm excitation,corresponding to Eu3+ions typical transitions of 5D0→7F1 and 5D0→7F2.The optimum concentration of Eu3+ions is 9 mol％for C-LBTO:xEu3+samples and the quenching interaction type is the nearest-neighbor ion interaction.The thermal stability of the C-LBTO:0.09Eu3+sample was investigated in detail and the device application further suggests that C-LBTO:0.09Eu3+can be used as a red phosphor for near-UV excited w-LEDs in lighting.
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| GB/T 7714 | Fan Zeng , Jingjing Ru , Bing Zhao et al. Development of a novel Eu3+-doped tantalate red-emitting phosphor for w-LEDs application [J]. | 稀土学报（英文版） , 2024 , 42 (8) : 1479-1488 . |
| MLA | Fan Zeng et al. "Development of a novel Eu3+-doped tantalate red-emitting phosphor for w-LEDs application" . | 稀土学报（英文版） 42 . 8 (2024) : 1479-1488 . |
| APA | Fan Zeng , Jingjing Ru , Bing Zhao , Feiyun Guo , Jianzhong Chen . Development of a novel Eu3+-doped tantalate red-emitting phosphor for w-LEDs application . | 稀土学报（英文版） , 2024 , 42 (8) , 1479-1488 . |
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A set of novel red phosphors Li8CaLa2Ta2O13:xEu3+ (LCLTO:xEu3+) were successfully prepared using a solid-state reaction method. The properties of the prepared samples, including phase purity, elemental composition, and morphology, were systematically investigated using X-ray diffraction, scanning electron microscopy, and diffuse reflectance spectroscopy analyses. The 610 nm maximum emission peak is attributed to the 5D0→7F2 transition of Eu3+ ion under 394 nm irradiation. Among all the LCLTO:xEu3+ phosphors, LCLTO:0.6Eu3+ showed the strongest emission intensity because of the concentration quenching effect of the electric dipole–dipole interaction among the Eu3+ ions, which was also demonstrated by the decay curves. Remarkably, the emission intensity of the optimal LCLTO:0.6Eu3+ phosphor, which exhibited a high internal quantum efficiency of 49.30% and excellent color purity of 96.79%, was approximately 2.29 times higher than that of commercial Y2O3:Eu3+ red phosphors. The thermal stability of the LCLTO:0.6Eu3+ sample with good color stability was meticulously investigated. The fabricated white-light-emitting diode (WLED) exhibited a superior color-rendering index of Ra = 82 and chromaticity coordinates of (0.3260, 0.3639), suggesting that LCLTO:0.6Eu3+ has potential applicability in developing efficient and high-quality WLEDs. Moreover, the prepared LCLTO:0.6Eu3+/PDMS composite film demonstrated exceptional flexural resistance and chemical stability, indicating considerable promise for practical anti-counterfeiting applications. © 2023
Keyword ：
LED device LED device Luminescence Luminescence Phosphor Phosphor Tantalate Tantalate
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| GB/T 7714 | Ru, J. , Zeng, F. , Zhao, B. et al. Development of red phosphor Li8CaLa2Ta2O13:Eu3+ for WLEDs and anti-counterfeiting applications [J]. | ChemPhysMater , 2024 , 3 (2) : 194-203 . |
| MLA | Ru, J. et al. "Development of red phosphor Li8CaLa2Ta2O13:Eu3+ for WLEDs and anti-counterfeiting applications" . | ChemPhysMater 3 . 2 (2024) : 194-203 . |
| APA | Ru, J. , Zeng, F. , Zhao, B. , Ye, C. , Zhong, T. , Guo, F. et al. Development of red phosphor Li8CaLa2Ta2O13:Eu3+ for WLEDs and anti-counterfeiting applications . | ChemPhysMater , 2024 , 3 (2) , 194-203 . |
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A set of colour tuning K2Ba(MoO4)(2): Dy3+/Eu3+ (KBM: Dy3+/Eu3+) phosphors were fabricated by solid-state method. The phase purity of as-prepared materials was validated by XRD and DRS analyses. The KBM: 0.03Dy(3+) sample exhibits two major luminescence lines at 481 and 572 nm when excited by 351 nm light, corresponding to Dy3+ ions' typical transitions of F-4(9/2) -> H-6(J) (J = 15/2, 13/2). By introducing Eu3+ ions into KBM: 0.03Dy(3+) phosphor, the ET from Dy3+ to Eu3+ ions arises, leading to colour tuning from green via yellowish green to pink with changing Eu3+ ions' concentration, along with the lowest CCT of KBM: 0.03Dy(3+)/0.03Eu(3+) sample. It can be verified by PLE and PL spectra analysis combined with the decay times of KBM: 0.03Dy(3+)/yEu(3+) samples. The energy transfer mechanism is also expounded. Meanwhile, the emission intensities at 423 K still maintain 72.8% for Dy3+ ions and 91.2% for Eu3+ ions relative to 303 K of the KBM: 0.03Dy(3+)/0.03Eu(3+) sample, displaying its brilliant thermal stability. All these results connote that KBM: Dy3+/Eu3+ phosphors are prospected to be used for the near-UV excited white light-emitting diodes.
Keyword ：
energy transfer energy transfer Phosphor Phosphor thermal stable thermal stable
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| GB/T 7714 | Ru, Jingjing , Zhao, Bing , Zeng, Fan et al. Colour tuning via energy transfer of K2Ba(MoO4)2: Dy3+/Eu3+ phosphors with thermal-stable property [J]. | BULLETIN OF MATERIALS SCIENCE , 2024 , 47 (2) . |
| MLA | Ru, Jingjing et al. "Colour tuning via energy transfer of K2Ba(MoO4)2: Dy3+/Eu3+ phosphors with thermal-stable property" . | BULLETIN OF MATERIALS SCIENCE 47 . 2 (2024) . |
| APA | Ru, Jingjing , Zhao, Bing , Zeng, Fan , Guo, Feiyun . Colour tuning via energy transfer of K2Ba(MoO4)2: Dy3+/Eu3+ phosphors with thermal-stable property . | BULLETIN OF MATERIALS SCIENCE , 2024 , 47 (2) . |
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Two novel phosphors LiBa4(1-x)Eu4xTa3O12 (H-LBTO:xEu(3+)) and Li0.25Ba1-xEuxTa0.75O3 (C-LBTO:xEu(3+)) were prepared successfully by a molten salt method. The transformation between these two structures was realized by changing the sintering temperature or changing the Eu3+ ions concentration, which was also demonstrated by the X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance spectra (DRS), and photoluminescence excitation (PLE) analyses. Both the sintering temperature and the Eu3+ ions doping concentration have significant impact on the formation of the crystal phase. All these phosphors sintered at 1023 K exhibit two major luminescence lines at 594 and 614 nm under near-UV light of 395 nm excitation, corresponding to Eu3+ ions typical transitions of D-5(0)-> F-7(1) and D-5(0)-> F-7(2). The optimum concentration of Eu3+ ions is 9 mol% for C-LBTO:xEu(3+) samples and the quenching interaction type is the nearest-neighbor ion interaction. The thermal stability of the C-LBTO:0.09Eu(3+) sample was investigated in detail and the device application further suggests that C-LBTO:0.09Eu(3+) can be used as a red phosphor for near-UV excited w-LEDs in lighting. (c) 2023 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Keyword ：
LED device LED device Phosphor Phosphor Rare earths Rare earths Tantalate Tantalate
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| GB/T 7714 | Zeng, Fan , Ru, Jingjing , Zhao, Bing et al. Development of a novel Eu3+-doped tantalate red-emitting phosphor for w-LEDs application [J]. | JOURNAL OF RARE EARTHS , 2024 , 42 (8) : 1479-1488 . |
| MLA | Zeng, Fan et al. "Development of a novel Eu3+-doped tantalate red-emitting phosphor for w-LEDs application" . | JOURNAL OF RARE EARTHS 42 . 8 (2024) : 1479-1488 . |
| APA | Zeng, Fan , Ru, Jingjing , Zhao, Bing , Guo, Feiyun , Chen, Jianzhong . Development of a novel Eu3+-doped tantalate red-emitting phosphor for w-LEDs application . | JOURNAL OF RARE EARTHS , 2024 , 42 (8) , 1479-1488 . |
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Ce9.33(SiO4)6O2 (CSO) crystals were grown by the Czochralski (Cz) method. Rietveld refinement of XRD patterns confirmed the oxyapatite structure of CSO, XPS analysis revealed the valence of Ce ions in CSO crystals. Magnetization curve and temperature dependencies of the magnetic susceptibility were measured, paramagnetic behavior and magnetic anisotropy have been observed. Photoluminescence and Faraday rotation characteristics of the CSO crystal were investigated at room temperature. Verdet constants of CSO were about 1.6 times as large as those of TGG. Baesd on Van Vleck-Hebb theory, the effective transition wavelength and probability of CSO crystal were calculated and compared with other Ce3+-containing crystals. The absorption and magnetic circular dichroism (MCD) spectra of 4f -> 5d transitions in Ce3+ ions in CSO crystal were studied.
Keyword ：
Czochralski method Czochralski method Magnetic circular dichroism(MCD) Magnetic circular dichroism(MCD) Magneto -optical properties Magneto -optical properties Verdet constants Verdet constants
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| GB/T 7714 | Chen, Xin , Lan, Qingying , Zhao, Bin et al. Czochralski growth, optical and magneto-optical properties of Ce9.33(SiO4)6O2 crystal [J]. | OPTICAL MATERIALS , 2023 , 147 . |
| MLA | Chen, Xin et al. "Czochralski growth, optical and magneto-optical properties of Ce9.33(SiO4)6O2 crystal" . | OPTICAL MATERIALS 147 (2023) . |
| APA | Chen, Xin , Lan, Qingying , Zhao, Bin , Chen, Jianzhong , Guo, Feiyun . Czochralski growth, optical and magneto-optical properties of Ce9.33(SiO4)6O2 crystal . | OPTICAL MATERIALS , 2023 , 147 . |
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A series of Dy3+ doped and Dy3+, Eu3+ co-doped NaCaTiTaO6 (NCTT) phosphors with the orthorhombic perovskite-type structures were prepared by a solid-state reaction method. The successful synthesis of the target samples was confirmed through various characterization techniques, such as XRD and Rietveld refinement, SEM, EDX spectroscopy, as well as elemental mapping. The optimal Dy3+ doping concentration of NCTT:xDy3+ under n-UV excitation was 0.10 mol. The phenomenon of efficient energy transfer between Dy3+ and Eu3+ ions was observed in the NCTT:0.1Dy3+/yEu3+ samples, as evidenced by the shortened lifetimes. Meanwhile, in the NCTT:0.1Dy3+/0.15Eu3+ sample, the PL intensity of Eu3+ ion at 420 K still maintained at 72.41% of that at 300 K, while that of Dy3+ ion is 82.35%, displaying its brilliant thermal stability. The performance of the fabricated white LED device using NCTT:0.1Dy3+/0.15Eu3+ as red phosphor was found to be outstanding, with Ra of 88, CCT of 5868 K, as well as excellent CIE chromaticity coordinates (0.325, 0.333), suggesting that NCTT:0.1Dy3+/ 0.15Eu3+ can be used as reddish-orange phosphors for w-LEDs in lightings and displays.
Keyword ：
Luminescence Luminescence Phosphors Phosphors W-LEDs W-LEDs
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| GB/T 7714 | Ru, Jingjing , Zeng, Fan , Liu, Yujin et al. The performance tuning of NaCaTiTaO6:Dy3+, Eu3+phosphor by employing the co-doping strategy for white LED application [J]. | OPTICAL MATERIALS , 2023 , 144 . |
| MLA | Ru, Jingjing et al. "The performance tuning of NaCaTiTaO6:Dy3+, Eu3+phosphor by employing the co-doping strategy for white LED application" . | OPTICAL MATERIALS 144 (2023) . |
| APA | Ru, Jingjing , Zeng, Fan , Liu, Yujin , Zhao, Bing , Li, Minyu , Sun, Xiaoli et al. The performance tuning of NaCaTiTaO6:Dy3+, Eu3+phosphor by employing the co-doping strategy for white LED application . | OPTICAL MATERIALS , 2023 , 144 . |
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