CRYSTENGCOMM
·
2024
·Vol. 26
·期 37
·5177-5186
·
IF 2.6
Zhichao Ren,Hongquan Yu,Xiangping Li,Jinsu Zhang,Sai Xu,Baojiu Chen
One-dimensional (1D) Y3Ga5O12:Pr3+ nanotubes (YGG:Pr3+ NTs) were prepared via single-nozzle electrospinning at 30% ambient humidity. The outer diameters of the YGG:Pr3+ NTs are between 190 and 210 nm, and the wall thickness is 35–45 nm. The nanotube consists of single-crystal YGG:Pr3+ nanoparticles. The optical properties of YGG:Pr3+ NTs with different Pr3+ concentrations, particularly their temperature-sensitive properties, were investigated. The YGG: 0.5% Pr3+ NTs exhibit the highest sensitivity of approximately 7.90 × 10−3 K−1 within the temperature range of 303–453 K.
研究领域:
材料科学
·
物理学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 48
·17515-17524
·
IF 4.099
Fengjun Chun,Binbin Zhang,Honggang Liu,Wen Deng,Wen Li,Meilin Xie,Chao Luo,Weiqing Yang
A series of Na+ and Pr3+ co-doped orange-emitting CaYAl3O7 (CYAO) phosphors were prepared by a conventional high-temperature solid-state reaction method. The crystalline structure, the luminescence properties and the decay times of the as-prepared samples were systematically investigated by X-ray diffraction (XRD) and steady-state and time-resolved photoluminescence. Under ultraviolet (UV) light and blue light excitation, the CYAO:Pr3+ phosphors exhibited orange photoluminescence emission and show potential for application in warm white LEDs, and the emission spectra of the as-prepared samples in the near-infrared (NIR) region were detected. Furthermore, Na+ ions were designed as charge compensators to maintain the charge balance. The luminescence intensities in the visible and NIR regions can be effectively enhanced by adjusting the doping amounts of Pr3+ ions and Na+ ions. Moreover, the optical spectra of Pr3+ in the CYAO host crystals were calculated by conventional parametric modeling based on the diagonalization of the complete 91 × 91 energy matrix. The calculated optical spectra were in good agreement with the observed ones and the obtained crystal field parameters were also in a reasonable range. This systemic study, and all of the above, will give a deep insight into the luminescence mechanism of the phosphors and then open one way to exploit the new phosphors for white LEDs.
研究领域:
材料科学
·
发光材料
·
固体化学
·
光电子学
·
无机功能材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yaowu Wang,Nan Lin,Yiheng Yue,Jianfeng Wang,Yinyan Li,Zhenping Wu,Shiqing Xu,Gongxun Bai
Near-infrared (NIR) phosphors have emerged as novel luminescent materials across various fields due to their unique advantages of high penetration and invisibility. However, there is currently a lack of intelligent NIR phosphors that can achieve multimode stimuli responsive for sensing applications. In this study, we employed a high-temperature solid-phase reaction to incorporate Pr3+ into Cr3+-doped gallate magnetite SrGa12O19 phosphor, yielding a multimode luminescent intelligent NIR phosphor. Also, due to the inherent cation vacancies and defects in the matrix, the material not only exhibits brighter photoluminescence but also exhibits distinct NIR mechanoluminescence at a lower load. Notably, Pr3+-doped SrGa12O19:Cr3+ also demonstrates extended persistent luminescence and thermoluminescence effects. Finally, we combined the phosphor with the blue LED chip to develop a new multifunctional NIR pc-LED. Leveraging NIR’s unique penetrating ability, it can persist in biological tissues for prolonged periods, enabling optical inspection and offering a novel approach to password protection for anticounterfeiting measures. This intelligent NIR phosphor solution significantly expands the application potential of NIR light in food quality assessment and analysis.
研究领域:
材料科学
·
光学工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 45
·期 1
·66-75
·
IF 3.288
Pengfei Zhang,Na Li,Zhiting Wei,Ziqi Wang,Mengwei Gou,Lei Zhao,Wenbo Chen,Qinping Qiang
Alternating current light-emitting diodes (AC-LEDs) set up a new era of economic semiconductor-based lighting. However, the flicker of AC-LEDs in the AC cycles is unhealthy for human eyes. In this work, the red-emitting afterglow phosphor Ca4Nb2O9:Pr3+ was successfully synthesized via a traditional high temperature solid-state reaction method. The phase composition, photoluminescence spectra, afterglow curve, and thermoluminescence were investigated. It was revealed that the red emission (617 nm) is ascribed to the 3P0 → 3H6 transition of Pr3+ ions, and the afterglow time was in the second range after removal of the excitation source. In order to gain a deeper understanding of the origin of afterglow, a subsequent thermoluminescence analysis was performed and a relatively shallow trap within the host was found. These results indicated that Ca4Nb2O9:Pr3+ phosphors could compensate for the flickering behavior of AC-LEDs and may be a candidate for application in AC-LEDs.
研究领域:
材料科学
·
光电
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Sikai Wang,Ziyang Wu,Lei Sun,Jinjun Ren,Xiaoxin Zheng,Jianzhong Zhang,Jing Ren
To overcome the challenges associated with conventional ultraviolet-C (UV-C) light-emitting devices—such as toxic mercury, aging of organic adhesives, and various stability concerns—an efficient UV-C emitting nano-glass composite (nano-GC) has been developed. The transparent nano-GCs embedded with Pr3+-doped Li(Al7B4O17) nanocrystals (NCs), achieved through precise modulation of the fluoride content in the glass matrix network. The unique architecture of these nano-GCs synergistically combines the high luminescence efficiency characteristic of crystalline phase with the robustness of glass. Upon excitation by deep-UV, X-ray and high energy electron-beam, the nano-GCs exhibit pronounced 5d-4f interconfigurational emissions of Pr3+, with their emission profile closely aligning with the germicidal effectiveness curve. Although the transmittance of nano-GCs is reduced compared to that of precursor glass (PG), their UV-C luminescence output is significantly enhanced—e.g., a sixfold increase under e-beam pumping. These nano-GCs achieve an impressive photoluminescence quantum yield of up to 25.93%, surpassing most previously reported Pr3+ doped glasses and nano-GCs. Moreover, the nano-GCs exhibit robust X-ray excited luminescence, with an intensity more than twice that of the commercial Bi4Ge3O12 (BGO) crystal, and exhibit a highly linear response to X-ray dose, accompanied by a decay time of 24.13 ns under γ-ray excitation. Collectively, this study presents a novel approach to the development of disinfection phosphors and fast scintillators.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Qiuyue Mu,Huimin Li,Ran Pang,Da Li,Su Zhang,Xiaodong Li,Lihong Jiang
A series of Pr3+ doped Sr2NaMg2V3O12 (SNMV) garnet phosphors were successfully synthesized by high temperature solid state method. The crystal structure, luminescent properties and temperature sensing properties of the phosphors were systematically studied. Under the excitation of 339nm, SNMV:Pr3+ phosphors exhibit strong blue-green broadband emission in the wavelength range of 400-700nm and typical red emission of Pr3+ at 612nm and 624nm, which correspond to the energy level transition of [VO4]3- group and 1D2→3H4,5 transition of Pr3+, respectively. Furthermore, in the temperature range of 98K-298K, high sensitivity optical temperature sensing is realized based on fluorescence intensity ratio (FIR) and fluorescence lifetime (FL). In FIR mode, the maximum absolute sensitivity (Sa) and relative sensitivity (Sr) of the phosphor are 0.01782K-1 (298K) and 1.13543%K-1 (298K), respectively. In FL mode, the maximum Sa value and Sr value are 0.0889K-1 (198K) and 0.62752%K-1 (223K), respectively. The results show that SNMV:Pr3+ phosphors have great potential in the field of optical temperature measurement.
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产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 36
·24513-24521
·
IF 4.123
Zheng Gong,Yuxue Liu,Jian Yang,Duanting Yan,Hancheng Zhu,Chunguang Liu,Changshan Xu,Hong Zhang
Spinel-phase Zn2Ga2.98−xGe0.75O8:Cr0.020,Prx (ZGGO:Cr3+,Pr3+) near infrared (NIR) persistent luminescence nanoparticles (PLNPs) with different amounts of Pr3+ dopant were prepared by a hydrothermal method in combination with a subsequent annealing in a vacuum. For these nanoparticles, the averaged particle size decreases from 64 to 37 nm with increasing Pr3+ doping concentration from 0 to 0.025 and Cr3+ and Pr3+ ions are uniformly doped into the interior and surface of a single nanoparticle. It can be found that Pr3+ doping leads to the appearance of more anti-site pairs () around distorted octahedral Cr3+ ions and enhanced NIR emissions around 697 nm, which originate from the 2E(2G) → 4A2(4F) and 4T2(4F) → 4A2(4F) transitions of the interior and surface Cr3+ ions in the nanoparticles. In particular, for the interior Cr3+ ions in the Pr3+ doped nanoparticles, the enhanced NIR luminescence can be attributed to the suppressed energy transfer of the excited electrons from the 4T2(4F) level to the trap level related to anti-site pairs () around the distorted octahedral Cr3+ ions. Our results suggest that Pr3+ doped ZGGO:Cr3+ PLNPs have potential applications for bio-imaging.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hong Chai,Chunwei Yang,Jianxia Liu,Xiang Lv,Ran Xiao,Wenting Li,Jiatong Song,Junliang Zhao,Ning Guo
Currently, the thermal quenching effect is still a pain point limiting the application of luminescent materials at high temperatures, and therefore it is of great significance to explore schemes with a well-defined mechanism to regulate the thermal quenching of phosphors. In this work, a controllable regulation of the energy level positions of the intervalence charge transfer bands was achieved by modifying the Sr/Ca ratio of Sr 1-x Ca x Nb 2 O 6 :0.005Pr 3+ . With the increase of x from 0.00 to 1.00, the IVCT energy level decreases from 4.03 eV to 3.96 eV, which leads to the easier transfer of 3 P 0 electrons of Pr 3+ to the 1 D 2 energy level through the IVCT band during the heating process, and thus realizes the enhancement of the thermal stability of the 1 D 2 emission, which is shown by the increase of the integrated emission intensity of 1 D 2 at 573 K compared with that of 298 K from 22.87 % (x = 0) to 98.89 % (x = 1) gradually. In particular, CaNb 2 O 6 :0.005Pr 3+ with the lowest IVCT energy level achieves a high degree of thermal stability, with the integrated emission intensity consistently maintained at 98.1%–103.6 % at 298K–573K. In addition, the phosphor's has potential for thermochromic and optical thermometry applications. This work shows the reliability of modulating the IVCT band energy level positions to realize the antithermal quenching of phosphors and its promising applications.
研究领域:
材料科学
·
发光材料
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 42
·15201-15211
·
IF 7.393
Wanggui Ye,Chaoyang Ma,Yanbin Li,Chong Zhao,Yuzhen Wang,Chuandong Zuo,Zicheng Wen,Yingkui Li,Xuanyi Yuan,Yongge Cao
The thermal quenching of phosphors seems to be inevitable, which severely limits their applications related to high temperature. Therefore, the development of thermally stable phosphors and the exploration of anti-thermal quenching mechanism is still a pivotal need. Herein, an internal self-regulation anti-thermal quenching strategy has been proposed to develop Pr3+-activated GdNbO4 red phosphor, whose loss of red emission intensity can be compensated at the expense of blue emission during the heating process. The integrated photoluminescence intensity of GdNbO4:x%Pr3+ (x = 0.1–2.5) is maintained or even continuously enhanced from 300 K to 620 K based on the metal-to-metal charge transfer between Pr3+ ions and Nb5+ ions. For the GdNbO4:0.1%Pr3+ sample, the integrated intensity of its red emission remarkably reaches 290% at 540 K compared to that at 300 K. As expected, the opposite temperature response of Pr3+ 3P0 → 3H4 and 1D2 → 3H4 indicates that GdNbO4:0.1%Pr3+ has advantage in optical thermometry based on MMCT (Sr = 0.7% K−1 at 430 K and Sa = 18% K−1 at 620 K). Our work could open a new gateway to design phosphors with anti-thermal quenching performance for high-temperature applications and develop high-performance optical temperature sensing in Pr3+-activated oxide phosphors.
研究领域:
材料科学
·
光学
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Guoxiang Song,Chaogang Lou,Bowen Shen,Zi Wang,Ruiqi Zhu
We achieved a quantum cutting process in Pr 3+ -Yb 3+ co-doped CaF 2 that converts one visible photon into two near-infrared photons matching the silicon band gap. In this study, the quantum cutting process between Pr 3+ and Yb 3+ was experimentally verified through comparative analysis of the normalized absorption spectrum of Pr 3+ and the near-infrared excitation spectrum of Yb 3+ . Fluorescence lifetime measurements at the optimal doping concentration revealed an energy transfer efficiency of 60.99% from Pr 3+ to Yb 3+ . Temperature-dependent luminescence spectroscopy further estimated the luminescence efficiencies as 64.49% (Pr 3+ ) and 71.41% (Yb 3+ ). Based on these results, the theoretical quantum efficiency of the Pr 3+ →Yb 3+ system was obtained to be about 112.26%, confirming the occurrence of efficient photon down-conversion. Considering the limited energy gain from sunlight due to the narrow-band absorption of Pr 3+ by f-f forbidden transition, Eu 2+ ions were employed to perform broadband sensitization on the quantum cutting process of Pr 3+ -Yb 3+ . Studies have suggested that the incorporation of Eu 2+ can effectively assimilate the 250-400 nm band and transfer energy to Pr 3+ and Yb 3+ , causing them to emit stronger near-infrared spectra. These developed materials are capable of converting ultraviolet-visible photons into near-infrared photons matching the silicon bandgap, which reduces energy loss caused by spectral mismatch and has promising applications in silicon-based photovoltaics.
研究领域:
材料科学
·
光子学
·
无机非金属材料
·
能源材料
·
固体发光
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Xudong Qi,Yan Zhao,Enwei Sun,Juan Du,Kai Li,Ye Sun,Bin Yang,Rui Zhang,Wenwu Cao
The photoluminescence , dielectric relaxation, ferroelectric hysteresis, and field-induced strain properties of Pr 3+ -doped 0.24Pb(In 1/2 Nb 1/2 )O 3 -0.42Pb(Mg 1/3 Nb 2/3 )O 3 -0.34PbTiO 3 (PIN-PMN-PT:Pr 3+ ) multifunctional ceramics have been investigated. It was found that Pr 3+ doping enhanced the dielectric diffuseness and relaxation behavior of PIN-PMN-PT ceramics. Slim P - E loops and S - E curves appear in PIN-PMN-PT:Pr 3+ ceramics when the Pr 3+ doping concentration reaches 1.4 mol%. Local domain configurations associated with phase transitions were investigated by piezoresponse force microscopy (PFM). Large electrostrictive coefficient Q 33 (˜0.03 m 4 /C 2 ) and high energy-storage efficiency η (92%) were obtained in 2 mol% Pr 3+ -doped PIN-PMN-PT ceramic in the ergodic relaxor (ER) phase at room temperature. The giant electrostrictive effect and excellent energy-storage performance are related to the field-induced dynamic behavior of polar nanoregions (PNRs). The results show that the PIN-PMN-PT:Pr 3+ system is an excellent multifunctional material for making electromechanical and energy storage devices.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 43
·15688-15695
·
IF 4.39
Minghui Li,Jun Zhou,Ruoshan Lei,Huanping Wang,Feifei Huang,Shiqing Xu
Nowadays, there is enthusiastic effort to develop luminescent thermometers used for remote and high-sensitivity temperature readout over a wide sensing range. Herein, Pr3+ and Gd3+ co-doped ZrO2 nanocrystals are designed, prepared and investigated by XRD, Raman spectroscopy, XPS, TEM, EDS, DRS, PLE and PL spectroscopy. Upon 275 nm irradiation, the PL spectrum of ZrO2:Pr3+,Gd3+ is found to be composed of a narrow emission peak at 314 nm (Gd3+ 6P7/2–8S7/2), a broad defect-related emission band at 400 nm, and several emission peaks in the wavelength region of 585–700 nm (Pr3+ 1D2–3H4, 3P0–3H6, and 3P0–3F2), which exhibit different thermal responses owing to the effects of the various non-radiative relaxation processes and trap energy levels. Accordingly, the luminescence intensity ratio (LIR) between the Pr3+ 1D2–3H4 and Gd3+ 6P7/2–8S7/2 transitions demonstrates excellent relative sensing sensitivity values ((2.32 ± 0.01)% K−1–(8.32 ± 0.05)% K−1) and low temperature uncertainties (0.08 K–0.28 K) over a wide temperature sensing range of 303 K to 573 K, which are remarkably better than those of many other luminescence thermometers. What is discussed in the present study may be conducive to broadening the research region of RE3+ doped luminescence thermometric phosphors, especially for materials with rich 4f–4f transition lines and defect-related luminescence.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）