Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 41
·11178-11183
·
IF 5.976
Yan Gao,Yao Cheng,Tao Hu,Zeliang Ji,Hang Lin,Ju Xu,Yuansheng Wang
In this study, a double-perovskite Pr3+:Gd2ZnTiO6 thermometric phosphor is designed and successfully synthesized for the first time via a high-temperature solid-state method. By taking advantage of the intervalence charge transfer state (IVCT) interfered Pr3+ luminescence, the synthesized phosphor exhibits excellent optical thermometric performance in terms of both the fluorescence intensity ratio and luminescence lifetime. Specifically, by using the fluorescence intensity ratio between Pr3+: 3P0 → 3H4 and 1D2 → 3H4 transitions as a temperature detecting signal in the range of 293–433 K, the maximum absolute and relative sensitivities reach as high as 0.63 K−1 and 1.67% K−1, respectively; taking the fluorescence lifetime of the 1D2 state as a detecting signal in the range of 433–593 K, the corresponding sensitivities are 0.096 μs K−1 and 1.48% K−1. The results demonstrate that a thermal reading with high sensitivity over a wide range of temperature can be realized by this novel dual-mode design.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Xihui Shan,Yi Zhang,Xulong Lv,Yanjie Liang
Far ultraviolet-C (far-UVC; 200–230 nm) luminescent materials have garnered significant interest in recent years, driven by the growing demands for applications such as disinfection and solar-blind imaging due to their distinct wavelength features. However, the research and development of far-UVC persistent phosphors are lacking. Here, we report the realization of far-UVC persistent luminescence in CaSO4:Pr3+ and CaSO4:Pb2+ phosphors, which show emissions peaking at 220 nm and 230 nm with a long persistence time of >24 h after ceasing X-ray excitation. This is by far the shortest UVC afterglow emission to the best of our knowledge. The far-UVC afterglow from the charged phosphors can be readily detected by a solar-blind UV camera in both indoor-lighting and outdoor environments owing to the absence of background noise from ambient light. The continuous photostimulation of indoor white LED light and outdoor sunlight has different impact on the far-UVC afterglow performance of CaSO4:Pr3+ and CaSO4:Pb2+ phosphors, which is elucidated by the decay time-dependent thermoluminescence (TL) curves in different light conditions. This study expands the field of persistent luminescence to the far-UVC spectral region and will inspire the discovery of more excellent far-UVC persistent phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2015
·
IF 2.353
Ke Wang,Wenlin Feng,Xu Feng,Yao Li,Peng Mi,Shasha Shi
Zn 0.997 WO 4 : Pr 3 + 0.003 and different concentrations (0.1 mol% to 0.9 mol%) of Pr, Li co-doped ZnWO 4 red phosphors were prepared by means of solid-state reaction process. The crystalline, surface morphology and luminescent properties of Zn 0.997 WO 4 : Pr 3 + 0.003 and Zn 1 − x − y WO 4 : x Pr 3 + , y Li + phosphors were investigated by the X-ray diffraction patterns (XRD), scanning electron microscope (SEM) and fluorescent measurements. From powder XRD analysis, the formation of monoclinic structure with C 2 / h point-group symmetry and P 2 / c space group of the as-synthesized samples is confirmed. The SEM image showed that surface morphology of the phosphor powder is irregular cylindricality. The luminescent spectra are dominated by the red emission peaks at 607, 621 and 643 nm, respectively, radiated from the 1 D 2 → 3 H 4 , 3 P 0 → 3 H 6 and 3 P 0 → 3 F 2 transitions of Pr 3 + ions. The concentrations of the highest luminescent intensity is determined at 0.3 mol% Pr 3 + and 0.3 mol% Li co-doped ZnWO 4 powder crystal, and the peak intensity is improved more than 3 times in comparison with that of 0.3 mol% Pr 3 + single-doped ZnWO 4 . The enhanced luminescence comes from the improved crystalline and from the charge compensation of Li + ions. The decay curve and CIE chromaticity coordinates of as-prepared samples are also studied in detail.
研究领域:
材料科学
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发光材料
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固态化学
·
光学材料
·
荧光粉技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 42
·23996-24001
·
IF 2.936
Tang Wei,Ni Haiyong,Zhang Qiuhong,Ding Jianhong
Optical temperature sensing based on the variation of the fluorescence intensity ratio of rare-earth materials has become appealing due to its multiple superiorities over electrical temperature sensing. However, confined by the largest energy separation of two thermally linked levels of rare earth ions, the highest sensitivity of such temperature sensing is essentially smaller than 2878/T2, as reported previously from diverse systems. In this work, we demonstrate that ultrahigh-sensitive temperature sensing can be achieved from Pr3+-doped (Ba0.7Sr0.3)TiO3 based on the intensity ratio of the 1D2–3H4 emission to the 3P0–3H4 emission. The ratio can be increased as much as 90-fold when the temperature rises from room temperature to 513 K, nicely fitting a thermally linked-levels like equation and showing an ultrahigh sensitivity of 4275.1/T2. The striking change of the ratio is attributed to the interaction between the two emission levels and the intervalence charge transfer state. This work may have provided a distinct route in the field of optical temperature sensing utilizing rare-earth-doped materials. In addition, the resultant product also possesses excellent photoluminescence and ferroelectric properties, showing promising potentials in multifunctional devices for practical applications.
研究领域:
光学传感
·
材料科学
·
光子学
·
铁电材料
·
稀土掺杂
·
温度测量
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Guofeng Zhang,Rui Hu,Dasheng Zheng,Yan Zhao,Zhiguo Song,Yongjin Li
Currently, the lack of efficient red/orange-light phosphor interferes with the performance improvement of white light emitting diodes (WLEDs) because of notably low color rendering index. Multicolor phosphors are considered to be able to solve the aforesaid shortcoming of existing WLEDs when assembled with ultraviolet or blue LED chips, thus the development of dual-emission phosphors has been a popular research field. Here, we synthesized a series of Li 2 SrTa 2 O 7 :Pr 3+ /Gd 3+ phosphor materials, and investigated their crystal structure and luminescent properties, including X-ray diffraction, diffuse reflectance spectra, photoluminescence, long-persistent luminescence. Results reveal that Li 2 SrTa 2 O 7 :Pr 3+ /Gd 3+ phosphors exhibit two dominant photoluminescence emission peaks at 495 nm and 620 nm respectively upon 295 nm excitation, showing bright yellow-green to the naked eyes, while their afterglow spectra show orange emission peaking at 620 nm. Their light color of photoluminescence emission can change from yellow-green to red with increasing temperature (300-490 K) along with minor thermal quenching. Moreover, an excellent orange LED lamp with the CIE chromaticity coordinates of (0.3986, 0.3832), the CCT of 3591 K is obtained by fabricating Li 1.99 SrTa 2 O 7 :4%Pr 3+ /4%Gd 3+ phosphor with a 310 nm LED chip. This research provides a practical foundation to understand and regulate the luminescent performance, and proposes a new strategy to realize warm light illumination of pc-LED devices.
研究领域:
材料科学
·
光电子学
·
固态照明
·
发光材料
·
荧光粉化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 22
·6698-6705
·
IF 6.641
Huimin Li,Ran Pang,Yanqing Luo,Haiyan Wu,Su Zhang,Lihong Jiang,Da Li,Chengyu Li,Jing Feng,Hongjie Zhang
Long-persistent phosphors can be used in diverse fields, such as emergency instruction, information storage and in vivo bioimaging. Currently, progress in research and development of white long-persistent phosphors is slow, although there is growing demand for applications in certain conditions. In this work, a novel white long-persistent phosphor Ba2Ga2GeO7:Pr3+ was synthesized and systematically investigated through its structural information, photoluminescence and phosphorescence properties. Under ultraviolet light excitation, this phosphor gives white emission containing greenish-blue and red components stemming from 3P0 and 1D2 multiplet electron transitions in the 4f level of Pr3+. The luminescent color of the phosphors is relatively stable at different temperatures and Pr3+ concentrations. Bright white afterglow can be observed by the naked eye in the dark for 3 hours after removal of the excitation source. Finally, a feasible afterglow mechanism of Ba2Ga2GeO7:Pr3+ with a trap–detrap scenario was proposed to clarify the generation of the white afterglow.
研究领域:
材料科学
·
发光材料
·
光学物理
·
固态化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 48
·11508-11513
·
IF 5.066
Wei Tang,Ye Sun,Shaochen Wang,Baosheng Du,Yongqi Yin,Xiao Liu,Bin Yang,Wenwu Cao,Miao Yu
The photoluminescence (PL) properties of post-treated Pr3+-doped (K0.5Na0.5)NbO3 (KNN:Pr3+) have been investigated for oxygen sensing. It is found that both the intensity ratio of the 1D2–3H4 red emission to the 3P0–3H4 blue-green emission and their absolute intensity have a strong response to oxygen adsorption at room temperature and elevated temperature. Especially, at 165 °C, the 1D2–3H4 emission intensity measured in a 100% O2 atmosphere was ∼3 folds higher than that in 100% N2, which is the highest response in all PL-based gas sensing oxides reported so far. Moreover, the high oxygen-sensing recoverability and reproducibility have been demonstrated. It is proposed that the intervalence charge transfer mechanism plays a key role in sensing. Together with the inherent ferroelectric and PL properties of KNN:Pr3+, the product may hold considerable potential in multifunctional devices.
研究领域:
光学传感
·
材料科学
·
发光材料
·
气体传感器
·
铁电材料
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Fengjun Chun,Binbin Zhang,Hai Su,Hanan Osman,Wen Deng,Weili Deng,Haitao Zhang,Xiaoyun Zhao,Weiqing Yang
A series of novel self-organized broccoli-like SrMoO 4 : Pr c 3+ ( c =0.01–0.06) superparticles were synthesized via a polymer-assisted hydrothermal (PAH) method. In this work, the polyetherimide and ethylene diamine tetraacetic acid were employed to bind metal ions for their homogeneous distribution and effectively control the nucleation and growth process of Pr 3+ doped SrMoO 4 . According to scanning electron microscope (SEM) detection, these SrMoO 4 : Pr 3+ superparticles show the broccoli-like three-dimensional architecture composed of highly intensive nanorods . Additionally, the SEM images of different SrMoO 4 : Pr 3+ superparticles with the gradually increasing growth time (0.5–24 h) were used to probe their self-organism grown mechanisms. Moreover, the red emission spectrum peaked at around 646 nm, attributed to the Pr 3+ 3 P 0 → 3 F 2 transition, can be effectively excited by the excitation wavelength of 449, 479 or 487 nm. Moreover, the average lifetimes decreased from 4.064 to 3.834 μs with increasing Pr 3+ doping concentration. Evidently, this PAH method shows a potential application in synthesis of self-assembling and well-distributed luminescent materials .
研究领域:
材料科学
·
发光材料
·
纳米材料
·
固态化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yalin Qin,Peikun Yan,Fuxuan Han,Yongcheng Zhang,Zonglin Lv,Chunming Zhou
The enhancement of both transparency and piezoelectric properties in transparent ferroelectric ceramics is a challenge. In this work, we prepared transparent 0.75Pb(Mg 1/3 Nb 2/3 )O 3 -0.25PbTiO 3 : x Pr 3+ ceramics by oxygen atmosphere sintering together with hot pressing sintering. When x = 1.5 mol%, a transparency of 68% @ 900 nm (close to the theoretical value ~71%) was achieved, and the piezoelectric properties increased to twice as much as those in undoped ceramics ( x = 0). The small average domain size (below 200 nm) that far below the visible light wavelength was believed to benefit light transmittance. Meanwhile, the minute amount of tetragonal component induced by Pr 3+ irons, was supposed to be responsible for the improved piezoelectric properties. These merits make Pr 3+ -doped 0.75PMN-0.25PT transparent ceramics promising functional materials for transparent piezoelectric devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Photochem
·
2025
·Vol. 5
·期 4
·
IF 2.3
Xiaoman Shi,Huimin Li,Ruiping Deng,Su Zhang,Hongjie Zhang
Long persistent phosphors are widely used in many fields, such as LED, bioimaging, urgent lighting, temperature sensors, etc. Although green and blue long persistent phosphors are well developed, efficient orange-yellow long persistent phosphors are still relatively rare. In this work, a novel orange-yellow long-persistent phosphors Ca2LuScGa2Ge2O12:xPr3+(CLSGGO:xPr3+, x = 0.003, 0.005, 0.01, 0.02, 0.03, 0.04, 0.05) are prepared and systematically investigated through its crystal structural information, photoluminescence, and persistent luminescence properties. Under ultraviolet light excitation, these phosphors exhibit orange-yellow emission stemming from the3P0and1D2multiple electron transitions in the 4f level of Pr3+ion. In addition, the material exhibits bright persistent luminescence. The complex garnet matrix structure of Ca2LuScGa2Ge2O12provides excellent conditions for the formation of traps. Through the testing of thermoluminescence curve and function fitting, the density and depth of traps are studied; also, the storage and release process of carriers in the material are calculated in detail. A reasonable persistent luminescence mechanism is proposed for CLSGGO:0.01Pr3+. This work enriches the research content of photoluminescence and long persistent luminescence of Pr3+-doped garnet-based phosphors and paves the way for the future research of long persistent luminescent materials doped with rare earth ions.
✓ 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
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Tianyi Duan,Xulong Lv,Lipeng Huang,Huanyi Zhang,Yanjie Liang
Multifunctional phosphors that integrate background-free ultraviolet-C (UVC) persistent luminescence with rewritable optical memory are highly desirable for smart photonic applications. However, achieving such systems remains challenging, as it requires the integration of long-lived carrier storage and reversible photochromic switching within a single defect landscape. Here, we report a single-activator multifunctional phosphor, LiCaBO 3 :Pr 3+ (LCBO:Pr), which couples multi-responsive UVC luminescence with reversible photochromism. Under 248 nm excitation, LCBO:Pr exhibits intense UVC down-shifting emission (276 nm). Remarkably, the same Pr 3+ centers also enable anti-Stokes UVC emission under 450 nm excitation, allowing blue-light-driven UVC output. Beyond X-ray-excited radioluminescence, LCBO:Pr demonstrates efficient energy storage and releases dual-channel UVC/red persistent luminescence (>24 h) after excitation ceases. This process is accompanied by a reversible white-to-brown photochromic transition with a high coloration degree of 61.2%, which can be nearly completely erased by heating or blue-light bleaching, achieving recovery efficiencies of 98.7% and 97.1%, respectively. Experimental analyses and first-principles calculations reveal that defect states associated with V O3 and B i govern both carrier trapping and color-center formation. The coupling of these defect-mediated processes enables integrated optical functionalities within a single material platform, allowing multichannel information writing, readout, and erasure, and offering a versatile platform for solar-blind photonic applications.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）