Advanced Optical Materials
·
2024
·
IF 8
Noor Zamin Khan,Sayed Ali Khan,Nisar Muhammad,Weilong Chen,Jahangeer Ahmed,Muhammad Amin Padhiar,Mei Chen,Marcin Runowski,Saad M. Alshehri,Baohua Zhang,Shu-Sheng Pan,Ren-Kui Zheng
Sr 3 CaNb 2 O 9 :Dy 3+ /Eu 3+ phosphors with a complex perovskite structure are prepared using a high-temperature solid- state reaction technique. These phosphors are doped either singly or in combination with Dy 3+ /Eu 3+ ions, resulting in efficient energy transfer from Dy 3+ to Eu 3+ and thus tunable-color emission. Under 353 nm excitation, the Sr 3 CaNb 2 O 9 :Dy 3+ phosphor emits blue (492 nm), yellow (583 nm), and red (682 nm) light, with the optimal doping concentration of Dy 3+ of 0.04%. When excited by 394 nm ( 7 F 0 → 5 L 6 ), the Sr 3 CaNb 2 O 9 :Eu 3+ phosphor exhibits two most intense emissions centered at 593 nm ( 5 D 0 → 7 F 1 ) and 614 nm ( 5 D 0 → 7 F 2 ). The decrease in luminescence intensity with increasing doping concentration of Dy 3+ and Eu 3+ is due to the cross-relaxation associated with electric dipole–dipole interaction. Photoluminescence emission measurements under excitations of 353 and 365 nm indicate that the Sr 3 CaNb 2 O 9 :0.04Dy 3+ /0.05Eu 3+ phosphor shows excellent thermal stability, even at a temperature of 150 °C, where the luminescence intensity preserves 79% of its initial value at room temperature. The electroluminescence performance of the Sr 3 CaNb 2 O 9 :0.04Dy 3+ /0.05Eu 3+ phosphor is tested with 365 nm LED chips for potential use in white LEDs. The results confirm that Sr 3 CaNb 2 O 9 :0.04Dy 3+ /0.05Eu 3+ phosphor has great potential for use in high-power white LED applications as a single matrix.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 46
·28971-28979
·
IF 2.9
Yuhan Fan,Yongze Cao,Meiling Li,Sai Xu,Yichao Wang,Xizhen Zhang,Jinsu Zhang,Baojiu Chen
A series of Tb3+, Pr3+ and Dy3+ monodoped CaTa4O11(CTO) persistent luminescence (PersL) phosphors have been successfully synthesized using the molten salt method with KCl flux. The PersL color is green and orange for Tb3+ and Pr3+ or Dy3+ doped samples, respectively. The trap depth of Tb3+, Pr3+ and Dy3+ monodoped CTO is 0.33, 0.31 and 0.30 eV, respectively. The PersL time of 3 mol% Tb3+, 1 mol% Pr3+ and 1 mol% Dy3+ monodoped samples is 52.20, 35.00 and 59.46 s, respectively. Tb3+, Pr3+ and Dy3+ monodoped CTO phosphors can be used in luminescence displays and anti-counterfeit labels under commercial 254 nm UV light.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Chunlin Ma,Yao Wang,Jia Zhang,Ying Hu,Zhangyin Zhai,Jin Wu,Weiping Zhou,Xuewei Lv
A series of Dy 3+ doped Na 0.5 Bi 0.5 TiO 3 (NBT: x Dy 3+ , x = 0.003–0.018) lead-free ferroelectric ceramics were successfully prepared by a solid-state reaction method. The Dy 3+ ions composition dependent photoluminescence properties were systematically studied. All the samples display intense characteristic emission of Dy 3+ under an excitation wavelength of 454 nm, which are attributed to the transitions of 4 F 9/2 → 6 H J /2 ( J = 13, 11 and 9). All the samples show strong orange-yellow emission, which could be applied to warm white light hopefully. When the content of Dy 3+ is equal to 0.012, the ceramic has the optimal luminous performance. Remarkable thermal quenching of the luminous intensity ceramic occurs as the temperature is higher than initial temperature 293 K. Furthermore, Dy 3+ activated photoluminescence performance combined with the presence of ferroelectricity in the NBT host can be applied to developing non-contact optical temperature sensitive materials and other future novel optoelectronic devices.
研究领域:
材料科学
·
光电子学
·
铁电材料
·
发光材料
·
温度传感
✓ 已验证
DOI
高影响因子
Optical Materials Express
·
2016
·Vol. 6
·期 11
·3375-3385
·
IF 2.657
Haibo Liu,Baoluo Feng,Li Luo,Chunlong Han,Peter A. Tanner
The phosphor Sr0.97Al2O4:0.01Eu2+, 0.02Dy3+ was synthesized by a high temperature solid state reaction in a reducing atmosphere. After charging by ultraviolet radiation, the persistent luminescence decay was divided into different time ranges and well-fitted by a biexponential function, but the two lifetimes became longer with time of persistent luminescence decay. The fractional amplitude of the shorter lifetime increased with time, whereas that of the longer lifetime decreased. The change in lifetime has been associated with the emptying of a pseudo-continuum of trap states either from different traps or different levels of the same trap species. The investigation in photostimulated persistent luminescence indicated the sample could emit bright persistent luminescence again under infrared light excitation after the UV light-excited persistent luminescence had decayed completely. The NIR photostimulation exhibited a continuous broad band, with maximum at 760 nm, representing the emptying of filled traps into the conduction band. These results also infer that the traps are pseudo-continuous but the assignment of Dy2+ as the trapped species cannot be excluded. The read-in and write-out properties of the phosphor have been elucidated and these convey applications in information storage and retrieval.
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 Nanoelectronics and Optoelectronics
·
2020
·Vol. 15
·期 5
·654-662
·
IF 0.771
Yin Xueai,Feng Weiwei,Zhang Xin
This research focuses on the fluorescent powder materials based on a single matrix of this type of LED. Taking Ba2CaWO6 as an example, mixing Dy3+ alone can produce blue and white light at 318nm UV excitation. At the same time, mixing Dy3+
with Eu3+ can make the fluorescent powders realize the emission of 491 nm/577 nm of Dy3+ and 588 nm of Eu3+. Dy3+ is set to 0.06 and the ratio of Eu3+ is adjusted to make the luminous color gradually close to white. In the study of Ba3Y(PO4)3
· xDy3+ · yEu3+, x is set as 0.07, and the content of y is set as 0.01∼0.08. Dy3+ alone will emit blue and white light under the laser at 391 nm. By increasing the content of Eu3+, polychromatic emission
can be carried out, and white light can be obtained by adjusting the concentration of Eu3+. At the same time, the application functions of white LED packaging are tested for the above materials. The results show that both Ba2CaWO6 · xDy3+
· yEu3+ and Ba3Y(PO4)3 · xDy3+ · yEu3+ materials can realize white lighting by adjusting the ratio of Eu3+ · Dy3+, increasing the proportion of Eu3+
can improve the color rendering of white LED.
研究领域:
材料科学
·
光电技术
·
发光学
·
照明技术
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Chaochao Tao,Feiyan Xie,Chongfeng Guo,Lin Liu,Ruilong Wei,Mengxia Xu,Houfa Mao,Hualan Xu,Sheng liang Zhong
Persistent luminescence (PersL) has drawn intense attention because of its widely practical applications. Dynamic color-tunable PersL is desired and fascinating for advanced anti-counterfeiting, information storage, etc. However, it is difficult to obtain and rarely reported. Herein, a simple and effective method by using coordination polymers (CPs) as precursors is designed for color-tunable zinc-cadmium silicate composites PersL phosphors. Compared with pure Zn 2 SiO 4 (ZSO) and CdSiO 3 (CSO), the composites (ZSO/CSO) exhibit significantly improved brightness and dynamic tunable color. With time evolution, the color varied from white to yellow to orange and finally even to red. Notably, the duration time of 1.0 % Dy 3+ doped ZSO/CSO is prolonged to 19000 s (>5 h) at the threshold value (0.32 mcd/m 2 ) after 254 nm irradiation, showing a more than 100-fold enhancement compared with CSO. In attempt to achieve a better understanding of the enhanced mechanisms, the formation energy of Dy 3+ and O-vacancy are accurately derived from first-principles calculations. Combined with thermoluminescence (TL) measurement, the PersL mechanism is proposed. Finally, the application of ZSO/CSO:1.0 % Dy 3+ in displaying and anti-counterfeiting was explored. This work not only provides a new way to the design of PersL phosphors through composite compounds, but also promotes the development of PersL phosphors in practical applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Xiaojiao Kang,Chuanyu Jia,Hongcheng Wang,Yongshan Xiao,Wei Lü
In this paper, we have synthesized a series of ultraviolet-emitting Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ phosphors. The Ca 9 In(PO 4 ) 7 :Ce 3+ phosphor exhibits bright blue emission under UV excitation. The Tb 3+ /Dy 3+ single doped Ca 9 In(PO 4 ) 7 can exhibit weak green and yellow emission, respectively. Based on the efficient energy transfer from Ce 3+ to Tb 3+ /Dy 3+ , the luminous efficiency of Tb 3+ /Dy 3+ in Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ can be remarkably promoted. The effects of Ce 3+ /Tb 3+ /Dy 3+ concentration, decay curves, PL emission and excitation spectra on the energy transfer from Ce 3+ to Tb 3+ /Dy 3+ in Ca 9 In(PO 4 ) 7 were investigated. The experimental results demonstrated that the energy transfer efficiency could reach 21.77 and 30.3% in Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ , respectively. This study suggests that the synthesized Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ compounds have potentials to be used as white light-emitting phosphors in UV light-emitting diodes.
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2020
·
IF 2.904
Tao Cai,Songtao Guo,Yongzeng Li,Di Peng,Xiaofeng Zhao,Weizhe Wang,Yingzheng Liu
Mechanoluminescence is a newly developed technology for the optical sensing of stress or surface pressure. One unfortunate limiting factor in its application is the sensors’ low sensitivity to stress (usually in the MPa range). In this study, an ultra-sensitive mechanoluminescent sensor is created based on the phosphor SrAl 2 O 4 :Eu 2+ , Dy 3+ , that showed greatly enhanced sensitivity (by a hundred times) than that of conventional mechanoluminescent sensors. This sensor took the form of a ceramic coating that was prepared via air plasma spray and vacuum tempering retreatment. Pure SrAl 2 O 4 :Eu 2+ , Dy 3+ powder was used with no supporting matrix to eliminate the negative effects of the elastic mismatch on the sensitivity. The sensor could resolve stress variations on the order of kPa based on the calibration results. We also demonstrated interesting applications based on this sensor, such as tactile sensing and air-pressure sensing, which show great promise for wireless mechanical perception.
研究领域:
材料科学
·
传感器与传感技术
·
陶瓷工程
·
光学材料
·
机械感知
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 38
·13410-13419
·
IF 7.393
Tao Hu,Lei Xia,Wen Liu,Jiyang Xie,Zuimin Jiang,Fei Xiong,Wanbiao Hu
Host-sensitized rare-earth-ion lighting has emerged as a promising route to realize single-phase white-light emission due to effectively overcoming the self-absorption problems within multiple phosphors. However, the involved energy transfer mechanism that refers to the kinetic processes of host-sensitized excitation and the complex interactions between excitons and activators are far beyond understood. Here, a single-phase white-light-emitting phosphor, Dy3+ doped LaInO3 (Dy-LIO), is explored through tuning the exciton behaviors and host-sensitized emission. As phosphors are excited through the interband transiton, the LIO host presents a broadband blue emission due to the recombination of self-trapped excitons (STEs), and Dy3+ ions acquire the excitation energy by grabbing STEs for lighting. Dy3+ doping reduces the InO6 octahedron distortion and meanwhile releases excitons, which in turn are captured by Dy3+ activators for energy transfer. Thus, dopant Dy3+ emits effective blue and yellow luminescence. In addition, the combined action of the undermined STE emission and the promoted Dy3+ luminescence generates a warm-white-light, which exihibits excellent thermal stability. The results reveal the exciton-mediated energy transfer processes from host (LIO) to activators (Dy3+) in Dy-LIO, with the energy transfer efficiency obtained as high as 77.2%. These findings build up a clear energy transfer mechanism between excitons and activators and further suggests a promising way to explore single-phase white-light-emitting phosphors.
研究领域:
材料科学
·
光子学
·
固态化学
·
发光材料
·
能量传递机制
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 30
·41245-41258
·
IF 7.8
Zhang Xiangyu,Hu Yuanyuan,Xu Chunlong,Cheng Lin,Gao Dangli
Rational design of Eu 2+ -activated red phosphors under visible light excitation remains a critical challenge in various fields such as photonics, optoelectronics, and white-light-emitting diodes. Herein, we engineer high density traps with a double metastable state in the SrZnOS matrix by constructing the reversible infinitesimal photoelectrochemical layered micro-unit battery structure via co-doping Eu 2+ and Dy 3+ ions for achieving robust red luminescence. The resulting SrZnOS:Eu 2+ ,Dy 3+ phosphor exhibits intense red photoluminescence at 620 nm under 468 nm excitation, matching the emission intensity of commercial SrAl 2 O 4 :Eu 2+ ,Dy 3+ under UV irradiation. Notably, this material exhibits multi-modal luminescence, encompassing red persistent luminescence along with tunable photo/thermo/mechano-stimulated luminescence. These properties make SrZnOS:Eu 2+ ,Dy 3+ highly promising for applications in secure information storage and advanced displays. Our work establishes a design principle for manipulating multi-mode luminescence in oxide hosts through photoelectrochemical cell engineering, opening avenues for next-generation functional materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Yuexin Wang,Yanhua Song,Xiuqing Zhou,Yi Li,Tingting Cui,Keyan Zheng,Ye Sheng,Haifeng Zou
A series of color-tunable emitting LuVO 4 :Tm 3+ ,Dy 3+ ,Eu 3+ microspheres were successfully synthesized by a solvothermal process. The structure was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results revealed that the sample is pure tetragonal phase of LuVO 4 and consists of 3D-hierachical microspheres with the diameter about 2 μm. Additionally, the possible formation mechanism of microspheres was proposed. Furthermore, the photoluminescence properties of LuVO 4 :Dy 3+ ,Eu 3+ samples were investigated in detail. Both blue and yellow emissions corresponding to the 4 F 9/2 - 6 H 15/2 , 4 F 9/2 - 6 H 13/2 transition of Dy 3+ ions and red emission corresponding to the 5 D 0 - 7 F J (J = 1, 2, 3, 4) transition of Eu 3+ ions can be observed in LuVO 4 :Dy 3+ ,Eu 3+ phosphors under 366 nm near-ultraviolet radiation. The energy transfer process between Dy 3+ and Eu 3+ was demonstrated to be resonant type via dipole-quadrupole mechanism. Additionally, when co-doping Dy 3+ with Tm 3+ or Eu 3+ or tri-doping Tm 3+ ,Dy 3+ ,Eu 3+ ions in the single component, the colorful emitting can be obtained by giving abundant blue, green, red, yellow, orange, especially white-light-emission. This type of color-tunable luminescence phosphors may have promising application in solid state lighting application.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
POLYMER INTERNATIONAL
·
2016
·Vol. 65
·期 10
·1238-1244
·
IF 2.414
Saiqi Tian,Jiating Wen,Haojun Fan,Yi Chen,Jun Yan,Peikun Zhang
An amino-terminated long persistent luminescent phosphor (Amino-SrAl 2 O 4 :Eu 2+ ,Dy 3+ ) was prepared based on inorganic SrAl 2 O 4 :Eu 2+ ,Dy 3+ phosphor, chemically modified with 3-aminopropyltriethoxysilane (KH550). Fourier transform infrared and X-ray photoelectron spectral, thermogravimetric and scanning electron microscopic measurements confirmed the successful synthesis of Amino-SrAl 2 O 4 :Eu 2+ ,Dy 3+ . Then this amino-functionalized phosphor was introduced into polyurethane (PU) through urea linkages, and the effects of the chemical combination of Amino-SrAl 2 O 4 :Eu 2+ ,Dy 3+ and PU on the morphology, structure, storage stability, and mechanical, thermal and luminescent properties of the resultant long persistent luminescent polyurethane (LPLPU) were investigated. Compared with SrAl 2 O 4 :Eu 2+ ,Dy 3+ /PU composites prepared by physical blending, the LPLPU shows better mechanical properties and storage stability due to the good compatibility of Amino-SrAl 2 O 4 :Eu 2+ ,Dy 3+ with PU. More residues and higher initial decomposition temperature are observed because the interaction of the amino-phosphor and PU delays the degradation. Study of the luminescent effect reveals that the LPLPU shows more than 10 h afterglow after cessation of the excitation light, and the brightness of green light in darkness is basically the same as that of LPLPU and SrAl 2 O 4 :Eu 2+ ,Dy 3+ /PU. © 2016 Society of Chemical Industry
研究领域:
材料科学
·
化学工程
✓ 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）