Advanced Optical Materials
·
2025
·
IF 7.2
Kejie Li,Haikuo Liu,Zhiying Wang,Mengmeng Dai,Jiaqi Zhao,Zuoling Fu
Near-infrared II (NIR-II, 1000–1700 nm) luminescence has emerged as a powerful tool for biomedical applications, including sensing, imaging, and drug delivery, owing to its superior tissue penetration depth and high spatial resolution. Lanthanide-based NIR-II nanoprobes are particularly promising due to their outstanding photostability and minimal cytotoxicity. However, two critical challenges impede their widespread implementation: severe thermal quenching at elevated temperatures and inefficient downshifting processes. Herein, a novel strategy is reported to address these limitations by precisely modulating energy transfer dynamics between Ho 3+ and Pr 3+ ions in NaYF 4 core–shell engineering. By carefully optimizing the concentration ratio and spatial distribution of these lanthanide ions in NaYF 4 core–shell nanocrystals, the population of 1 G 4 (Pr 3+ ) is significantly increased, effectively suppressing thermal quenching while boosting downshifting efficiency. The optimized system leverages dual NIR-II emission channels ( 1 G 4 and 5 I 6 ) in NaYF 4 :Yb 3+ /Ho 3+ @NaYF 4 :Yb 3+ /Pr 3+ nanocrystals, enabling ultrasensitive temperature sensing with a maximum relative sensitivity ( S r ) of 2.03% K −1 . Furthermore, the synergistic up/down-conversion properties of Ho 3+ and Pr 3+ facilitate multimodal anti-counterfeiting, offering a robust platform for advanced information encryption and storage. This work not only establishes a new paradigm for engineering NIR-II luminescence but also underscores their vast potential in advanced applications, from precision biosensing to high-security encoding technologies.
研究领域:
纳米技术
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材料科学
·
生物医学工程
·
光学
·
传感器
·
发光
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2021
·
IF 6.789
Ying Zhang,Yujie Luo,Shiqi Fu,Xiulong Lv,Qian He,Fangying Ji,Xuan Xu
UVC (wavelength < 280 nm) has a wide range of applications in the field of water disinfection due to its excellent bactericidal performance. In this work, we synthesized an upconversion luminescent material, β-NaYF 4 : Pr 3+ , Li + (NYF), which can generate UVC, and compounded it with a BiOCl photocatalyst to synthesize β-NaYF 4 : Pr 3+ , Li + @BiOCl (NYF-Bi) with a core-shell structure. The NYF-Bi composite material can be driven under visible light and has high photocatalytic activity . The bactericidal performance of NYF and NYF-Bi were evaluated using Escherichia coli , Staphylococcus aureus , Shigella and Salmonella . The NYF-Bi composite material killed 99.99% of E. coli under visible light (λ ≥ 420 nm) within 180 min and maintained high germicidal efficacy after 4 cycles. Finally, we deduced the sterilization mechanism of the NYF-Bi composite material through carrier dynamics studies and catching agent experiments. The death of bacteria was mainly caused by UVC light and active species , including h + , OH, and O- 2. This research provides a new material for water disinfection.
研究领域:
环境科学
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材料科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·
IF 7
Yi Zhang,Shao Yan,Fang Xiao,Xihui Shan,Xulong Lv,Weili Wang,Yanjie Liang
With the occurrence of global health events such as COVID-19, the development of high-performance ultraviolet-C (UVC) light sources for efficient and convenient sterilization applications holds promising scientific and engineering prospects. However, discovering reliable and stable luminescent materials capable of converting incident excitation energy to UVC radiation remains a challenge. Herein, we report a new Sr2P2O7:Pr3+ phosphor that exhibits exceptional capabilities in X-ray energy absorption, storage, UVC-light conversion, and persistent UVC light emission. Specifically, minutes of X-ray excitation can result in more than 24 h of continuous UVC persistent luminescence when monitored at 222 nm emission, realizing far-UVC afterglow for the first time. Intense UVC persistent light emission could be detected by a UVC corona camera in bright indoor and outdoor environments without interference from artificial light or natural sunlight, in consideration of the avoidance of the spectral overlap with ambient light. The self-sustained UVC persistent luminescence form was demonstrated as an optical-conversion strategy for sterilization application, whereby the charged Sr2P2O7:Pr3+ persistent phosphor could effectively inactivate infectious methicillin-resistant Staphylococcus aureus (MRSA) within 30 min in an excitation-free manner, offering new insights into developing UVC light sources for sterilization applications. This work expands the field of UV persistent luminescence research to the far-UVC spectral region and is expected to bring new and power-free solutions to some important applications where far-UVC light is needed, such as sterilization and photodynamic therapy.
研究领域:
材料科学
·
光学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 10
·2102200
·
IF 10.05
Chong Zhao,Yingkui Li,Wanggui Ye,Xiaofei Shen,Zicheng Wen,Xuanyi Yuan,Yongge Cao,Chaoyang Ma
Colloidal all-inorganic lead halide perovskite nanocrystals (LHP NCs) feature with tunable high-efficiency photoluminescence from blue to red for optoelectronic applications but suffer from instability under water moisture, UV light illumination, high-temperature shock, as well as oxygen erosion. Previous work to improve LHP NCs stability was mainly focused on either glass bulk sealed LHP quantum dots (QDs) with low quantum efficiency, or mesoporous silica matrixes confined LHP QDs with organic ligands still existing. Here, a facile, noncolloidal, ligand-free LHP QDs growth with physical confinement is proposed by integrating the growth of perovskite QDs with the fabrication process of hydrophobic silica-aerogel powders (SAPs). As a result, the as-synthesized mono- and mixed-cesium-lead-halide QDs @ SAPs composites show tunable photoluminescence from purple to deep red. Besides, the Pr 3+ ions doped CsPbBr 3 QDs @ SAPs composites exhibit moderate quantum efficiency, excellent stability under UV illumination, water moisture as well as temperature variation. Furthermore, performances of white LED device encapsulated Pr 3+ doped composite with blue GaN chip and commercial red (Sr, Ca)AlSiN 3 :Eu 2+ phosphor are evaluated. This work demonstrates a facile and general strategy for synthesizing high-stable all-inorganic cesium-lead-halide QDs for applications in white LED and display devices.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 5
·3291-3302
·
IF 4.186
Yan Sun,Juping Ma,Chongyun Shao,Xin Wang,Fei Yu,Meisong Liao,Lili Hu,Jonathan Knight
In this work, we revealed the possible mechanisms of the photodarkening in Pr 3+ ions singly doped and Pr 3+ /Ce 3+ co-doped silicate glasses and fibers induced by X-ray and 488-nm laser radiations and studied the role of Ce 3+ in increasing radiation resistance in Pr 3+ -doped silicate glasses and fibers. The absorption, emission, electron paramagnetic resonance (EPR), radiation induced attenuation spectra, and X-ray photoelectron spectroscopy (XPS) of Pr 3+ singly doped and Pr 3+ /Ce 3+ co-doped silicate glasses before and after X-ray radiation were measured and analyzed. The fluorescence intensity and photoinduced attenuation of Pr 3+ singly doped and Pr 3+ /Ce 3+ co-doped silicate fibers at visible wavelengths pumped by 488-nm laser were measured and analyzed. The influence of Ce 3+ ions co-doping on the spectroscopic properties of Pr 3+ ions as well as the radiation-induced defects in silicate glasses was studied. Results demonstrate that both X-ray and 488-nm laser radiations will induce photodamage in Pr 3+ ions-doped silicate glasses and fibers. Co-doping Ce 3+ (by up to 1 mol%) is efficient to suppress the darkening induced by both X-ray and 488-nm laser radiations without influence on the luminescence behavior of Pr 3+ ions in silicate glasses and fibers. Our studies demonstrate the promising potential of Pr 3+ /Ce 3+ co-doped silicate glasses for visible lasing applications.
研究领域:
光学材料
·
光子学
·
稀土掺杂玻璃
·
辐射效应
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光纤光学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 9
·1639
·
IF 4.324
Zhigang Sun,Bin Lu,Guiping Ren,Hongbing Chen
A translucent Gd2O2S:Pr ceramic scintillator with an in-line transmittance of ~31% at 512 nm was successfully fabricated by argon-controlled sintering. The starting precipitation precursor was obtained by a chemical precipitation route at 80 °C using ammonia solution as the precipitate, followed by reduction at 1000 °C under flowing hydrogen to produce a sphere-like Gd2O2S:Pr powder with an average particle size of ~95 nm. The Gd2O2S:Pr phosphor particle exhibits the characteristic green emission from3P0,1→3H4transitions of Pr3+at 512 nm upon UV excitation into a broad excitation band at 285–335 nm arising from 4f2→4f5dtransition of Pr3+. Increasing Pr3+concentrations induce two redshifts for the two band centers of 4f2→4f5dtransition and lattice absorption on photoluminescence excitation spectra. The optimum concentration of Pr3+is 0.5 at.%, and the luminescence quenching type is dominated by exchange interaction. The X-ray excited luminescence spectrum of the Gd2O2S:Pr ceramic is similar to the photoluminescence behavior of its particle. The phosphor powder and the ceramic scintillator have similar lifetimes of 2.93–2.99 μs, while the bulk material has rather higher external quantum efficiency (~37.8%) than the powder form (~27.2%).Keywords:Gd2O2S;Pr3+doping;ceramic scintillator;phosphor powder
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Ruoshan Lei,Xinyao Luo,Ziyuan Yuan,Huanping Wang,Feifei Huang,Degang Deng,Shiqing Xu
In this work, a new optical thermometer relying on highly temperature-dependent 1 D 2 Pr 3+ emission and temperature insensitive Y 2 Ti 2 O 7 trap emission is reported. Based on the fluorescence intensity ratio (FIR) between them, Pr 3+ : Y 2 Ti 2 O 7 with remarkably high absolute and relative sensitivities of ~ 983 × 10 −4 K −1 and 5.25% K −1 as well as good signal discriminability is realized. It also exhibits a tunable luminescent color from red to purplish blue with temperature from 289 to 573 K. The strong thermal quenching of 1 D 2 Pr 3+ emission is mainly related to the charge transfer state (CTS). Similarly, Pr 3+ : Gd 2 Ti 2 O 7 phosphor also demonstrates a favorable temperature sensing feature, indicating the temperature sensing strategy based on the combination of host trap emission and CTS interfered Pr 3+ luminescence is a promising pathway to develop high-performance optical thermometric materials.
研究领域:
光学传感
·
发光材料
·
测温技术
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稀土掺杂
·
固体物理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liang Dong,Sihan Yang,Jian He,Qi Zhu,Ji-Guang Li,Xuejiao Wang
This work studied the Pr 3+ single doped KSrScSi 2 O 7 : x Pr 3+ ( x = 0–10 at%) and Ce 3+ -Pr 3+ codoped KSrScSi 2 O 7 : Ce 3+ , y Pr 3+ ( y = 0.5–7 at%) phosphors, including photoluminescence characteristics, crystal structure, and the mechanism of Ce 3+ → Pr 3+ energy transfer. All the samples were synthesized by the high-temperature solid-phase method. Under 448 nm light excitation, the KSrScSi 2 O 7 : x Pr 3+ ( x = 0.5–10 at%) phosphors emitted narrow-band cyan-blue light (490 nm, 3 P 0 → 3 H 4 ), green light (530 nm, 3 P 1 → 3 H 5 ), orange-red light (605 nm, 1 D 2 → 3 H 4 and 3 P 0 → 3 H 6 ), and red light (645 nm, 3 P 0 → 3 F 2 ). The KSrScSi 2 O 7 : 3 at%Ce 3+ , y Pr 3+ ( y = 1–7 at%) phosphors exhibited broad-band (380–550 nm) luminescence of Ce 3+ and narrow-band luminescence of Pr 3+ under 365 nm light excitation. In comparison with KSrScSi 2 O 7 : 3 at% Ce 3+ , the doping of 3 at% Pr 3+ beneficially enhanced the thermal stability of the phosphor (I 423 K /I 298 K from 37.4 % to 48.6 %), which was attributed to the introduction of electron trap by Pr 3+ . Through trapping energy levels compensation, the thermal stability of the phosphor was improved. By measuring the fluorescence decay kinetics of Ce 3+ in KSrScSi 2 O 7 : 3 at% Ce 3+ , y Pr 3+ ( y = 0–7 at%), we have proved the existence of Ce 3+ → Pr 3+ energy transfer, whose efficiency rises from 42.8 % to 67.2 % along with increasing Pr 3+ concentration. A pc-WLED was fabricated by combining KSrScSi 2 O 7 : 3 at% Ce 3+ , 3 at% Pr 3+ with commercial red and green phosphors, and the device showed a high color rendering index (CRI = 94.8) and superior color rendering stability.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 35
·27491-27495
·
IF 3.84
Wei Tang,Ye Sun,Miao Yu,Xiao Liu,Yongqi Yin,Bin Yang,Limei Zheng,Feng Qin,Zhiguo Zhang,Wenwu Cao
Single-phase SrTiO3:mPr3+ (m = 0.01–0.1) nanoparticles have been synthesized by a hydrothermal method. Different from reported Pr3+-based phosphors which were all dominated by red emissions, considerably strong and overwhelming blue-green emission centered at 491 nm has been achieved together with minor green and red emissions. The absolute and relative intensities of these emissions can be modified by Pr3+ concentrations and annealing temperatures in a controlled manner, giving rise to varied emission colors. In particular, owing to the appropriate combination of the blue to red emissions, desirable white-light emission has been realized from the as-grown SrTiO3:0.01Pr3+ and the annealed SrTiO3:0.06Pr3+ samples at 350 °C with CIE chromaticity coordinates of (0.33, 0.35) and (0.35, 0.37) and a correlated color temperature of 5601 K and 4883 K, respectively, indicating the promising application potential of SrTiO3:Pr3+ as single-phase phosphors for white light-emitting-diodes. This work may provide a fresh route to acquire white emission from a single-composition phosphor.
研究领域:
材料科学
·
光子学
·
固态化学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Xing Cao,Shichang Sun,Bing Lu,Yan Liu,Rui Ma,Huiqun Cao,Hongzhi Ma,Hexun Huang
In order to overcome the shortcomings of insufficient red light component and poor thermal stability of commercial white light emitting diode (WLED), YAG:Ce, R (R: Gd 3+ , Pr 3+ , Gd 3+ and Pr 3+ ) fluorescent thin films were prepared by pulse laser deposition (PLD). The composition and microstructure, photoluminescence properties, and red-enhanced mechanism of co-doped YAG fluorescent thin films, as well as the electroluminescence behavior of the corresponding WLEDs were investigated. Results showed that the doping of Pr 3+ caused the emission spectrum energy of Ce 3+ to migrate, and an emission peak appeared at 606 nm in the red region. The doping of Gd 3+ caused the emission spectrum of Ce 3+ to shift to the red region, and the main peak position of the Ce 3+ emission spectrum is red-shifted from 523 nm to 548 nm. The YAG:Ce,Pr,Gd fluorescent film not only realized the improvement of red light components and red-shift, but also increased the energy transmission efficiency from 33.3% to 51.9%. Moreover, results of the color coordinate analysis also showed that the co-doping of Gd 3+ and Pr 3+ made the luminescence closer to the red region, reducing the color temperatures and hues changed to warm. Thus, tri-doped transparent fluorescent thin film were prospective for WLED application.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Hengli Liu,Xinxin Yang,Xiaofang Zhao,Wei Liu,Huan Li,Lin Li,Yusong Du,Guihua Li,Jin Han,Shuai Cheng,Guanghui Rao,Jingtai Zhao
The elasticoluminescence (EML) performance is significantly influenced by lattice defects and piezoelectric properties, which can be effectively modulated through the incorporation of a certain amount of ferroelectric materials. In this study, a series of novel ferroelectric phosphors Li 0.97 Nb 1- x Ta x O 3 : 0.01Pr 3+ were synthesized via a conventional solid-state reaction method under ambient atmospheric conditions. The defects, piezoelectric properties, and their relationship with optical performance were systematically investigated using X-ray diffraction, X-ray photoelectron spectroscopy, photoluminescence, diffuse reflectance spectroscopy, high-resolution transmission electron microscopy, and dielectric measurements. The incorporation of Ta 5+ ions resulted in a reduction in ferroelectric domain size and an enhancement in dielectric properties, thereby improving piezoelectric performance. Moreover, the introduction of Ta 5+ ions induced the formation of new impurity defects, resulting in an increased concentration of defect complexes. Both the enhanced piezoelectric response and the higher density of defect complexes contribute to the improvement of mechanoluminescence performance. This study can present a viable strategy for the development of advanced mechanoluminescent materials.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yalin Qin,Fuxuan Han,Peikun Yan,Yaqi Wang,Yongcheng Zhang,Shujun Zhang
A transparent ferroelectric 0.75Pb(Mg 1/3 Nb 2/3 )O 3 -0.25PbTiO 3 :0.015Pr 3+ ceramic was synthesized and its temperature-sensing ability was investigated based on the fluorescence intensity ratio (FIR) method. The transparency was found to be of the order of 68% at 900 nm for a sample thickness of 0.7 mm, comparable to the theoretical value of ~71%, benefiting the photoluminescence of the Pr 3+ ions inside the ceramic. Instead of the traditional Boltzmann exponential style and varying sensitivity, a highly linear temperature response was obtained for the studied ceramic. Further, a constant FIR sensitivity of 0.70 %K -1 was achieved over the temperature range of -50–40 °C, making the ceramic suitable for thermometry at room temperature and below.
研究领域:
材料科学
·
光学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）