Laser & Photonics Reviews
·
2026
·
IF 9.7
Yangyang Du,Ziyu Li,Zhicheng Chen,Zhaochen Su,Liu Gong,Limin Jin,Keyuan Ding,Dengfeng Peng,Xian Chen
Lanthanide ion-based upconversion is a highly promising approach for achieving deep-ultraviolet (DUV) emission. In particular, the visible-to-ultraviolet upconversion process of Pr 3+ ions, which proceeds via an intermediate energy level, serves as an efficient technical approach to realize high-efficiency DUV emission under easily accessible blue light excitation. Herein, through 5% Lu 3+ doping, we have strengthened the lattice rigidity of the tetragonal yttrium oxybromide (YOBr) host, resulting in an approximately 40% enhancement in the DUV luminescence performance of Pr 3+ . Mechanistic studies show that the enhancement is attributed to the highly suppressed non-radiative relaxation from the 4 f 1 5 d 1 state without significant thermal ionization. Moreover, we unambiguously demonstrate the formation of broadband DUV random lasing, Fabry-Pérot cavity lasing, and whispering-gallery-mode microcavity lasing by employing these efficient DUV-emitting microcrystals as the laser gain medium. Notably, the pumping threshold is substantially reduced compared to conventional five-photon processes utilizing Tm 3+ or Er 3+ ions. Our findings highlight the viability of enhancing the DUV luminescence intensity in oxyhalides through compositional engineering and realizing DUV lasing via blue-pumped Pr 3+ -based upconversion material as a gain medium.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 15
·5206-5216
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IF 7.393
Weihong Yuan,Tao Tan,Haiyan Wu,Ran Pang,Su Zhang,Lihong Jiang,Da Li,Zhijian Wu,Chengyu Li,Hongjie Zhang
Phosphors emitting visible and near-infrared persistent luminescence have been extensively studied and commercialized owing to their wide applications in emergency lighting, information storage and in vivo bioimaging. However, ultraviolet (200–400 nm) persistent phosphors are rarely reported. Here, we developed a new Pr3+ activated BaLu2Al2Ga2SiO12 persistent luminescence phosphor, which could be effectively excited by a standard 254 nm mercury lamp and exhibits excellent ultraviolet (280–400 nm) persistent luminescence lasting for more than 3 h. This exciting result encouraged us to comprehensively investigate its structural information, photoluminescence and thermoluminescence properties to reveal a feasible persistent luminescence mechanism. The results show that Pr3+ ions act as both photoluminescence and persistent luminescence emitters, and the ultraviolet light emission originates from its parity allowed 4f15d1 → 4f2 inter-configurational transitions. The suitable energy location of the lowest energy 4f2 → 4f15d1 excitation transition and small Stokes shift of less than 3000 cm−1 (0.37 eV) related to the composition and crystal structure of the host lattice BaLu2Al2Ga2SiO12 ensure the occurrence of Pr3+ 4f15d1 → 4f2 transitions. Moreover, the suitable trapping levels related to Pr4+ in BaLu2Al2Ga2SiO12:Pr3+ were also investigated utilizing thermoluminescence spectra, which could be effectively filled by carriers under 254 nm light irradiation to achieve ultraviolet persistent luminescence. This study opens up new avenues for future research on ultraviolet persistent luminescence and brings new application prospects in the fields of photocatalysis and photodynamic therapy.
研究领域:
材料科学
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光学材料
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发光材料
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固态化学
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光子学
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DOI
高影响因子
Advanced Optical Materials
·
2023
·
IF 9
Sikai Wang,Chunshuai Hua,Lu Wang,Ci Wang,Lu Liu,Jing Ren,Jianzhong Zhang
Glassy phosphors offer a promising opportunity to overcome the limits of polycrystalline counterparts, thanks to their merits including excellent optical transparency, abandonment of organic binders, and capability of drawing fibers, etc. However, research and development of glassy UV-C phosphors and fast scintillators have seriously lagged behind crystals. Here, a new type of efficient UV-C phosphors and fast scintillators (double gain) is developed from Pr 3+ -doped transparent nano-glass composites (nano-GCs) containing KY 3 F 10 nanocrystals. Such a material combines favorably the advantages of both crystal and glass, exhibiting intense interconfigurational 5 d -4 f emissions of Pr 3+ upon deep-UV, high energy electron-beam and X-ray excitations. The emission profile ideally overlaps with the germicidal effectiveness curve. The Pr 3+ -doped nano-GCs are endowed with a radiative decay time shorter than that of extensively studied Ce 3+ -doped glasses and nano-GCs. They exhibit intense X-ray excited radioluminescence that is comparable to the standard Bi 4 Ge 3 O 12 (BGO) crystal and significantly stronger than Pr 3+ -doped ZBLAN fluoride glass known for the high luminescence efficiency. An X-ray imaging system with a good spatial resolution using the Pr 3+ -doped nano-GCs is also demonstrated.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
G.Q. Wang,Y.P. Lin,R. Ye,Y.N. Feng,L.Y. Li
In this work, Pr 3+ and Tb 3+ coactivated Na 5 Gd(WO 4 ) 4 (NGW) phosphors have been synthesized by high-temperature solid-state reactions and the scheelite crystal structure was determined for the first time. A color-tunable emission in NGW: Pr 3+ , Tb 3+ phosphors can be realized by the modulation of excitation wavelengths, namely, the fluorescence intensity ratio of Pr 3+ to Tb 3+ in this material could be changed by different excitation. With increasing temperature, the luminescence of NGW: Pr 3+ , Tb 3+ phosphor decreases almost linearly with the CIE coordinate variation from (0.306, 0.392) to ((0.375, 0.465) and result in the color of the photoluminescence variation from the blue-green to yellow. These results demonstrated that the investigated phosphors are attractive for application in display lighting and optical temperature sensing.
研究领域:
材料科学
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发光材料
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光学性质
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固态化学
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温度传感
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Ying Li,Jing Jiang,Qingyi Lv,Bohuai Shao,Chuang Wang,Ge Zhu
The discovery of high color purity red-emitting phosphors is a major challenge for solid-state lighting materials. Benefitting from highly condensed and flexible framework structure of β -Ca 3 (PO 4 ) 2 -type compounds, we have successfully prepared three different kinds of novel high color purity red-emitting phosphors Sr 19 Mg 2 (PO 4 ) 14 : Re 3+ (Re 3+ = Eu 3+ , Sm 3+ , Pr 3+ ) by using traditional sintering method. Rietveld refinement, SEM measurement, absorption spectra, emission/excitation spectra, fluorescence decay analysis and emission spectra in terms of different temperature were investigated and discussed clearly. The matrix optical band gap was calculated to be 4.5 eV by reflection data, which indicated the suitable host for rare earth doping. The single doped Eu 3+ , Sm 3+ and Pr 3+ phosphors could respectively exhibit characteristic and strong red emission peaks at 614 nm, 598 nm and 642 nm when excited by (near) ultraviolet radiation. Excitingly, all samples could obtain high color purity with the value of 91.6%, 90.6% and 84.8% for Eu 3+ , Sm 3+ , Pr 3+ ions, respectively. Moreover, the thermal stability can stay strong which still keep over 75% at 150℃ when comparing with that at atmospheric temperature. The quantum efficiency (QE) is another important parameter for phosphors which were measured to be 46.6% for Eu 3+ , 53.1% for Sm 3+ and 10.3% for Pr 3+ . The present work indicates that the Sr 19 Mg 2 (PO 4 ) 14 : Re 3+ phosphors are efficient red components with extraordinary color purity and high quantum efficiency for industrial applications as solid-state lighting materials.
研究领域:
材料科学
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光学材料
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固态化学
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发光学
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磷光体技术
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DOI
高影响因子
Materials Horizons
·
2025
·
IF 10.7
Yi Wang,Jiaren Du,Hengwei Lin,Dirk Poelman,Eugeniusz Zych
Materials that emit ultraviolet C (UVC) or ultraviolet B (UVB) radiation are essential in domains such as environmental surveillance, public health, and optoelectronic technologies, owing to their elevated photon energy and distinct optical characteristics. However, the development of innovative persistent luminescent phosphors exhibiting emission within the UVC or UVB spectral range continues to pose a considerable challenge. Herein we present a novel Pr3+-doped Na2SrSi2O6 phosphor featuring a cyclosilicate framework, which exhibits sustained photon emission in the UVC and UVB regions, alongside luminescence in the red spectral range. The Na2SrSi2O6:Pr3+ phosphor demonstrates pronounced and long-lasting UVC, UVB and red persistent luminescence following X-ray excitation, underscoring its effectiveness for utilization in both dark and bright environments. Moreover, the incorporation of smaller ionic radius co-dopants such as Mg2+ or Ca2+ effectively enhances the red emission intensity of the phosphor. In contrast, the introduction of the larger ionic radius co-dopant Ba2+ not only enhances the content of UVC emission but also improves the overall luminescent efficacy. As the content of Ba2+ increases, the phosphor exhibits a spectral transition from UVC to UVB within the ultraviolet region. Notably, the applications of this phosphor were assessed in bright-field and dark-field imaging, showcasing its considerable potential for high-contrast monitoring in bright daylight, and advanced optical marking technologies. This work advances the development of visible-to-invisible persistent luminescent materials and offers a good example of engineering the cyclosilicate matrices for luminescence spectrum tuning.
研究领域:
材料科学
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发光材料
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光电子学
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固态化学
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环境监测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Chunqing Fu,Wei Meng,Xiaoyan Fu,Shuya Wang,Wenzhi Sun,Hongwu Zhang
X-ray irradiated La 2 Ti 2 O 7 :Pr 3+ was found to show long-time sustainable mechanoluminescence (ML), which can realize the high sensitivity and real time detection of stress burst for more than 72 h. Under the excitation of X-ray, La 2 Ti 2 O 7 :Pr 3+ shows red ML emissions located at 610, 624 and 638 nm, which are similar to the afterglow emission spectrum and can be ascribed to 1 D 2 - 3 H 4 , 3 P 0 - 3 H 4 and 3 P 0 - 3 H 2 of Pr 3+ . And the linear increases of compressive load can induce the linear increases of ML intensity of the sample, indicating that the X-ray induced ML emission can be utilized to accurately detect the stress applied on the object. Furthermore, X-ray irradiated La 2 Ti 2 O 7 :Pr 3+ possesses excellent stability and the repeatability of ML emission and the ML signals can keep stable even 50 load cycles after 1 h decay. The thermoluminescence results suggest that abundant electrons are trapped in shallow and deep answered for stable ML emission. More importantly, the deeply trapped electrons induced ML emissions from X-ray irradiated La 2 Ti 2 O 7 :Pr 3+ can be utilized to detect the stress bursts for a long time. When the sample is recharged by 5 min X-ray irradiation once, within 24 h decay, the 1500 N burst among many 1000 N cycles can be clearly detected, and the signal to noise ratio (S/N) reaches 1.32 and 1.26 after 12 and 24 h decay, respectively. And even after 72 h decay, the S/N of 2500 N still arrives at 1.23 and that of 4000 N reaches 1.97, indicative of long-time high sensitivity detection of abnormal stress. All these results suggest that the X-ray-irradiated La 1.97 Ti 2 O 7 :0.03Pr 3+ /resin sample can realize the high sensitivity and real time detection of stress burst for more than 72 h, which thus possesses great potential application in early warning of the emergency disasters such as bridge fracture, tunnel collapse and so on.
研究领域:
材料科学
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光学
·
物理学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Fengjun Chun,Wen Li,Binbin Zhang,Wen Deng,Xiang Chu,Hai Su,Hanan Osman,Haitao Zhang,Xiaoyun Zhao,Weiqing Yang
Quartz substrate supported Praseodymium (Pr) doped strontium molybdate (SrMoO 4 ) thin films with good uniformity and outstanding fluorescent properties are successfully fabricated via a facile polymer-assisted deposition (PAD) method. In combination with the strong chelating effect of water-soluble polymer on metal cations, the free cations without chelating are effectively ruled out but the remaining chelating metal cations are employed for the highly uniform and accurate stoichiometry luminescent SrMoO 4 : Pr thin films , layer-by-layer mounting on the common quartz substrates. More importantly, the excellent release of stress from polymer during the growth process of epitaxial thin film can effectively overcome the mismatch between thin film and common quartz substrate and then guarantee the quality of thin film. Under the ultraviolet (UV) light excitation, the samples show high luminescence intensity both in visible and near-infrared (NIR) regions peaked at 646 nm and 1037 nm, mainly ascribing to the transitions of 3 P 0 → 3 F 2 and 1 G 4 → 3 H 4 of Pr 3+ ions. The luminescent properties can be tailored by optimizing the number of spin-coated layers and doping concentrations. The maximum emission occurs at 4 mol% of Pr 3+ dopant , and it exhibits an impressive high photoluminescence quantum yield (QY) of up to 86.12%. These results evidently demonstrate the present PAD method is a useful prototype for preparing high performance luminescent thin films even on the cheap quartz substrate.
研究领域:
材料科学
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光学材料
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发光与光子学
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薄膜技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xin Li,Xusheng Wang,Rui Hu,Yanxia Li,Xi Yao
We report a novel mechanoluminescent phosphor Li 1−x Ca x Si x Ta 1−x O 3 :0.01Pr 3+ (x = 0–0.04). The crystal structure, photoluminescence (PL), optical diffuse reflectance spectra, afterglow (AG), fluorescence decay curves, and mechanoluminescence (ML) properties were investigated. To clarify the defect types and the mechanoluminescence mechanisms, an X-ray photoelectron spectroscopy (XPS) and thermoluminescence curve (TL) were measured. The dopants Ca 2+ and Si 4+ ions occupied the Li+ and Ta 5+ sites, respectively. An optimal sample Li 0.98 Ca 0.02 Si 0.02 Ta 0.98 O 3 :Pr 3+ was obtained with great enhancement in mechanoluminescence intensity, higher than that of non-doped sample LiTaO 3 :Pr 3+ by 262%. And the compression threshold, over which the ML intensity could not maintain the linear increase, has also been greatly improved. Furthermore, the stable output of Tribo-L was achieved, which was visible to the naked eye. A probable mechanism was proposed to illustrate the mechanoluminescent process in Li1-xCaxSixTa1-xO3:0.01Pr3 + (x = 0–0.04). The study indicates that adjusting trap distribution by substituting host ions may be a novel way to develop high-quality mechanoluminescence.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xiaoxuan Fan,Yonggui Zheng,Zimin Yao,Pingping Liang,Xuemei Lu,Jianbo Xu,Baijie Guan,Tianya Tan,Shuo Cao,Yang Zhao,Kexin Wang,Feifei Yin,Jiwei Wang
Long afterglow photocatalyst has shown the potential to support all-weather photocatalytic reactions. In this work, an Ag/Ca2Al2SiO7: Pr3+ (Ag/CASO: Pr3+) composite has been synthesized to enhance afterglow-driven photocatalytic activity. Ag loading introduces the surface plasmon resonance (SPR) effect to increase light absorption capacity. It extends the afterglow duration and improves the afterglow intensity via the storage and release of hot electrons. The Schottky junction between Ag and CASO: Pr3+ inhibits the recombination of photogenerated electrons and holes and increase the active sites in photocatalytic reactions. The photodegradation performance of Ag/CASO: Pr3+ was increased by up to 6.6-fold compared to CASO: Pr3+ under afterglow driven. The concentration of active species was further increased by adding Fe3+ and H2O2 to construct the Fenton system. Ag/CASO: Pr3+ can achieve a 55% removal rate of TC and 60% removal rate of NFX under its own afterglow-driven within 1 h after 10 min of ultraviolet light irradiation. This work expands the use of long afterglow luminescence materials and advances the development of all-weather photocatalytic technology.
研究领域:
材料科学
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环境科学
·
光催化技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shanshan Zhao,Xiaoshan Zhang,Ruilin Zheng,Hehe Dong,Shiyu Sun,Fan Wang,Shubin Chen,Shikai Wang,Chunlei Yu,Lili Hu
Quantum cutting in the near-infrared (NIR) region offers an effective strategy for enhancing the photoelectric conversion efficiency of silicon-based (c-Si) solar cells. However, developing materials capable of simultaneously converting visible and ultraviolet (UV) light into NIR emission remains a major challenge. Matching the energy gap between Pr 3+ 3 P j (j = 0, 1, and 2) and Yb 3+ 2 F 7/2 levels enables resonance energy transfer (ET), resulting in efficient quantum cutting and upconverted emissions. In this study, a series of CaLaAl 3 O 7 :Pr 3+ /Yb 3+ phosphors was prepared via high-temperature solid-state reactions. Upon excitation at 450 and 250 nm, Pr 3+ /Yb 3+ co-doped phosphors demonstrated downshifted emission peaks at 484, 526, 548, 594, 604, 615, 644, and 728 nm, attributed to the 3 P 0 → 3 H 4 , 3 P 0 → 3 H 5 , 3 P 1 → 3 H 5 , 3 P 1 → 3 H 6 , 1 D 2 → 3 H 4 , 3 P 0 → 3 H 6 , 3 P 0 → 3 F 2 , and 3 P 0 → 3 F 4 transitions of Pr 3+ , respectively. Moreover, under 450 nm excitation, an intense NIR emission was observed at 980 nm, resulting from ET from Pr 3+ to Yb 3+ , and the quantum cutting efficiency ( ) for the 3 P 0 → 3 F 2 transition becomes 190% at a Yb 3+ concentration of 20%. Meanwhile, the quantum cutting efficiency ( ) for the 3 P 0 → 3 H 4 transition becomes 189% at a Yb 3+ concentration of 20% under 250 nm excitation. Notably, the CaLaAl 3 O 7 single-doped Yb 3+ sample demonstrated intense charge transfer luminescence under 257 nm excitation. Temperature-dependent spectral measurements revealed that the materials possess excellent thermal stability. Furthermore, under 980 nm NIR excitation, characteristic visible-light luminescence of Pr 3+ was observed. The fitted slope of the upconversion luminescence intensity as a function of laser pump power density was n 460-516 = 2.36, indicating a two-photon absorption upconversion process. These materials have the potential to not only enhance the photoelectric conversion efficiency of silicon-based solar cells but also mitigate excessive heating of silicon-based space cells under intense UV irradiation.
研究领域:
材料科学
·
光子学
·
光学材料
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可再生能源
·
固态化学
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产品关联
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Yishu Lv,Shuxian Bi,Ziming Ma,Yuan Shu,Pengfei Zhang,Zhenghong Luo
Doping is crucial for regulating oxygen vacancies and improving the catalytic performance in transition metal oxides (TMOs). While prior research has extensively explored the effects of dopant valence and ionic radius, the role of the dopant spatial distribution in determining TMO performance has received limited attention. This study systematically examines praseodymium (Pr) doping in nickel oxide (NiO), with a focus on the spatial distribution of dopants. By precisely controlling the placement of Pr either at the surface or within the bulk lattice, we demonstrate that bulk doping induces lattice distortion, which increases the oxygen migration rates. This enhancement in oxygen mobility results in improved catalytic performance compared with surface doping. The study establishes a structure–activity relationship in doped TMOs and proposes an unexpected strategy for optimizing the catalytic performance through controlled dopant positioning.
研究领域:
材料科学
·
催化化学
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无机化学
·
固态化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）