BIOMATERIALS
·
2012
·
IF 7.404
Zhen Liu,Fang Pu,Sa Huang,Qinghai Yuan,Jinsong Ren,Xiaogang Qu
Due to their unique electric, magnetic, and optical properties, engineered nanostructures have been applied to provide diagnostic, therapeutic, as well as prognostic information about the status of disease. In this study, we report a multifunctional nanoprobe based on PEGylated Gd 2 O 3 :Yb 3+ , Er 3+ nanorods (denoted as PEG-UCNPs) for in vivo up-conversion luminescence (UCL), T 1 -enhanced magnetic resonance (MR), and X-ray computed tomography (CT) multi-modality imaging. A facile and large-scale hydrothermal system combining the merits of an in situ thermal decomposition method and a surface-modified approach is introduced to construct high-quality PEG-UCNPs. By grafting PEG molecules on the surface of PEG-UCNPs, the nanostructures possess excellent stability against in vivo environment and hold long blood circulation time. Cell-cytotoxicity assay, hemolyticity, as well as post-injection histology, hematology, and inflammation analysis further demonstrate their non-cytotoxic character and indicate further in vivo application. In detail, the capability of PEG-UCNPs as high-performance contrast agents for UCL/MR/CT imaging is evaluated successfully through small-animal experiments. Additionally, pharmacokinetics, biodistribution, and clearance route are studied after intravenous injection in a mouse model, reflecting their overall safety.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Qiyao Guo,Jihuai Wu,Yuqian Yang,Xuping Liu,Jinbiao Jia,Jia Dong,Zhang Lan,Jianming Lin,Miaoliang Huang,Yuelin Wei,Yunfang Huang
The introduction of upconversion materials as spectral converter into photovoltaic devices to harvest and convert near infrared photons to visible photons that can thus be absorbed by perovskite layer is a promising strategy for enhancing the performance of perovskite solar cells . Hence, β-NaYF 4 :Yb 3+ /Er 3+ /Sc 3+ @NaYF 4 rare-earth doped upconversion nanoparticles with core-shell structure are synthesized. The doped rare-earth ions Yb 3+ and Er 3+ convert near infrared light to red and green light, and the Sc 3+ ions enhance the upconversion luminescence efficiency, which broaden the absorption range of solar irradiation and generate extra photocurrent in the solar cells. The surface defects of β-NaYF 4 :Yb 3+ /Er 3+ /Sc 3+ is passivated by the even NaYF 4 shell, which results in the obvious enhancement in upconversion emission intensity. Consequently, the perovskite solar cell based on the rare-earth doped upconversion nanoparticle mesoporous layer achieves a high power conversion efficiency of 20.19%, while the device based on TiO 2 mesoporous layer gets an efficiency of 17.44%.
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Fuhua Gao,Wasim Ullah Khan,Zhiyuan Cheng,Waheed Ullah Khan,Iqtidar Ahmad,Zhiqi Ye,Shenghong Yang,Yueli Zhang
Broadband near-infrared (NIR)-emitting materials have critical applications in biology, medical detection, and NIR night-vision. However, developing NIR phosphors with promising optical properties and excellent thermal stability is a great challenge for research. In this work, a novel NIR phosphor Cr 3+ and Yb 3+ doped CaSc 2 O 4 (CSO) is an evolving NIR emitting phosphor with decent optical properties , boosted emission intensity, and thermal stability that makes it a promising candidate with potential applications in NIR-LED and infrared night-vision. The implications of the fundamental electronic structure of CSO, including valence-band (VB) and conduction-band (CB) orbital character, are investigated. Under blue light excitation, CSO:Cr 3+ is settled with pure broadband NIR emissions (max = 920 nm, FWHM (full width at half maximum) = ∼310 nm) and good thermal stability . The occupation of two selectable lattice sites of Cr 3+ in CSO is discussed in detail. Furthermore, emission enhancements of samples are done by Cr 3+ and Yb 3+ codoping, effectively broadening FWHM to 351 nm and reducing thermal quenching. The energy transfer (ET) routes in CSO:Cr 3+ ,Yb 3+ are investigated based on PL lifetime and comprehensive kinetic ET model, revealing that the PL enhancements by Cr 3+ and Yb 3+ codoping mainly originate from the ET from Cr 3+ to Yb 3+ emitters with more efficient and thermally stable. Finally, an InGaN-LED device encapsulated using CSO:0.01Cr 3+ and CSO:0.01Cr 3+ ,0.01 Yb 3+ phosphor was fabricated. The fabricated NIR pc-LEDs are excellent candidates for NIR light sources in biological imaging and NIR night vision.
研究领域:
光学材料
·
生物医学成像
·
光电子学
·
无机发光材料
·
红外技术
·
固态照明
·
纳米生物技术
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Yuchao Shi,Jing Li,Wenhao Cui,Yaru Peng,Yuxin Huang,Li Chen
Monodisperse In 2 O 3 : Yb 3+ /Er 3+ upconverting nanoparticles (UCNPs) were firstly synthesized via solvothermal method in three-neck round-bottom flask. Powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier-transform infrared spectroscopy (FTIR) methods are used to characterize the prepared UCNPs. The size of monodisperse spheroid nanoparticles prepared can be controllable in 31 nm. The sample exhibits stronger upconversion luminescence (UCL) than reported In 2 O 3 : Yb 3+ /Er 3+ UCNPs with similar size. Furthermore, the obtained In 2 O 3 UCNPs, by coating the SiO 2 protecting layer, display fine stability. Simultaneously, the UCL properties and possible energy transfer process of In 2 O 3 : Yb 3+ /Ho 3+ and In 2 O 3 : Yb 3+ /Tm 3+ NPs have also been investigated by the spectra distribution and power dependence. The results indicate Yb 3+ /Er 3+ , Yb 3+ /Ho 3+ and Yb 3+ /Tm 3+ codoped In 2 O 3 UCNPs is a probable oxide upconverting material with small size and intense UCL for biological applications.
研究领域:
材料科学
·
光学
·
生物医学
✓ 已验证
DOI
高影响因子
RARE METALS
·
2026
·
IF 11
Chunshen Li,Yuexin Zhu,Wendong Nie,Haomiao Zhu,Peng Zhang
en Narrowband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) featuring low full-width at half maximum (FWHM) and high conversion efficiency are crucial for chemical content evaluation, light therapy, and bioimaging. Recently, Yb 3+ doped CsPbCl 3 nanocrystals (NCs) have emerged as promising phosphors for NIR pc-LEDs, delivering narrowband 980 nm emission with an FWHM below 50 nm and a photoluminescence quantum yield (PLQY) exceeding 100%. However, the practical employment of CsPbCl 3 : Yb 3+ NCs is limited by their poor thermal stability. In this work, we present a high-temperature stable, melt-grown CsPbCl 3 : Yb 3+ single crystal (SC) and narrowband NIR pc-LEDs fabricated from CsPbCl 3 : Yb 3+ powder and violet LED chips. Our pc-LEDs achieve a low FWHM of 46.81 nm and a high conversion efficiency of 2.44% at a drive current of 20 mA. More importantly, our pc-LEDs exhibit exceptional thermal stability, retaining 98.2% of their PL emission intensity at 360 K. Finally, these NIR pc-LEDs successfully demonstrate applications in night vision, vein imaging, non-destructive testing, and the detection of early fruit bruises. This work underscores the significant potential of narrowband 980 nm pc-LEDs based on CsPbCl 3 : Yb 3+ crystal for diverse applications. 摘要 zh 具有窄半峰全宽和高转换效率的窄带近红外荧光粉转换发光二极管在化学成分分析、光疗及生物成像等领域具有关键应用价值。近年来,Yb 3+ 掺杂CsPbCl 3 纳米晶已经成为近红外荧光粉转换发光二极管的潜在荧光材料,其可实现980 nm窄带发射,低于50 nm的半峰全宽和超过100%光致发光量子产率。然而,CsPbCl 3 : Yb 3+ 纳米晶的热稳定性较差,严重限制了其实际应用。本研究通过熔融生长法制备了高温稳定的CsPbCl 3 : Yb 3+ 单晶,并利用CsPbCl 3 : Yb 3+ 粉末与紫光发光二极管芯片制备了窄带近红外荧光粉转换发光二极管。在20 mA驱动电流下,该荧光粉转换发光二极管的半峰全宽低至46.81 nm,转换效率高达2.44%。更重要的是,其展现出优异的热稳定性,在360 K环境下仍能保持98.2%的光致发光强度。最后,该近红外荧光粉转换发光二极管在夜视成像、静脉探测、无损检测及水果早期损伤识别等场景中实现了成功应用。本研究证实,基于CsPbCl 3 : Yb 3+ 晶体的980 nm窄带近红外荧光粉转换发光二极管在相关领域具有广泛的应用前景。
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2026
·Vol. 14
·期 5
·e01740
·
IF 7.2
Um-e Kalsoom,Shakir Hussain Chaudhry,Jiaqing Guo,Abida Parveen,Yueshu Feng,Liwei Liu
The study reveals that these nanoparticles exhibit highly tunable photoluminescence (PL), with distinct blue, red, and near-infrared emissions that are highly sensitive to temperature changes. For the first time, the temperature-dependent characteristics of PL emissions for optical thermometry behavior among 300–500 K for particular nanoparticles are also investigated. The temperature-dependent fluorescence intensity ratio (FIR) technique, leveraging phonon-mediated apparent temperature-dependent coupling among Tm 3+ states, is employed to calculate the absolute sensitivity (S a ) and relative sensitivity (S r ) of particular nanoparticles. The results indicate high S a values of up to 0.0108 K −1 for sample A and 0.0017 K −1 for sample B across the given temperature range. Sample A exhibits a higher S r of 0.0122%K −1 at low temperatures, while decreasing to 0.0046%K −1 at higher temperatures, while sample B maintains a relatively consistent value over the same temperature range. These results highlight the potential of the synthesized nanoparticles as an effective optical thermometric probe. The Yb 3+ concentration directly modulates energy transfer efficiency and temperature sensitivity by influencing both the rate of energy transfer to Tm 3+ and the extent of nonradiative losses. Optimizing Yb 3+ content is thus crucial for achieving high sensitivity and stability in PL-based optical thermometry, positioning Yb 3+ /Tm 3+ co-doped K 0.3 Bi 0.7 F 2.4 nanoparticles as promising candidates for advanced noncontact temperature sensing applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yuzhen Wang,Chuandong Zuo,Chaoyang Ma,Wanggui Ye,Chong Zhao,Zhe Feng,Yanbin Li,Zicheng Wen,Chong Wang,Xiaofei Shen,Xuanyi Yuan,Yongge Cao
This work focused on influences of Sc 3+ dopants on local site symmetry and ligand field of Er 3+ activators as well as its up-conversion luminescence performances sensitized by Yb 3+ ions in NYTiO 4 (NYT). The structure analysis and Judd-Ofelt calculation confirmed that doping Sc 3+ ions could lower site symmetry as well changed the ligand field around Er 3+ ions. The introduction of Sc 3+ ions induced variations of crystal lattices , regulated distances between Er 3+ ions and Er 3+ or Yb 3+ ions, and thus influenced the up-conversion luminescence properties . Besides, time-resolved decay curves figured out the great enhancement of lifetime and luminescence quantum efficiency for both green and red emissions due to Sc 3+ dopants. For optical temperature sensitivity, thermally coupled levels (TCLs) for blue emission 4 F 5/2 / 4 F 7/2 → 4 I 15/2 was studied for the first time. Besides, TCLs for violet emission 4 G 11/2 / 2 H 9/2 → 4 I 15/2 as well as green emission 2 H 11/2 / 4 S 3/2 → 4 I 15/2 were also recorded. By tri-doping Sc 3+ ions into NYT: Yb/Er, both absolute sensitivity and relative sensitivity of above three TCLs were improved with temperature uncertainty decreasing.
研究领域:
材料科学
·
发光材料
·
固态化学
·
光学物理
·
稀土掺杂
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Tianhui Wang,Yongjin Li,Tong Liu,Yuehong Peng,Zhaoyi Yin,Zhengwen Yang,Jianbei Qiu,Zhiguo Song
The upconversion of near-infrared (NIR) fluorescence, with a high tissue penetration depth, possesses a distinct advantage in biological temperature detection but is limited by the lack of rare earth-doped nanophosphors with intense and selective NIR UC emission. Here, we show that high-efficiency NIR temperature sensing can be achieved by appropriately doping Tm 3+ activators into a polarized layered host, utilizing the high environmental sensitivity of the 3 H 4 → 3 H 6 electric dipole transition (808 nm) of Tm 3+ . To confirm this concept, Yb 3+ /Tm 3+ codoped Bi 7 F 11 O 5 upconverting nanosheets were synthesized and characterized. Furthermore, the thermometric performance of the samples was analyzed based on the temperature-dependent fluorescence intensity ratio from the thermally coupled levels ( 3 F 3 / 3 H 4 ) of Tm 3+ . The results showed that, under 980 nm diode laser excitation, the prepared samples can produce a high NIR-to-visible UC emission ratio (I 800nm /I 475nm ) of over 2000 for Tm 3+ . The maximum sensitivity S a /S r was 1.4% K −1 /0.577 K −1 at 303 K based on the 3 F 3 and 3 H 4 levels, and the material exhibited a wide functional temperature range of 303–573 K. The results of our work not only improve the understanding of the optical properties of RE 3+ ions in layered materials but also show a potential application for physiological temperature sensing in biological tissues and cells.
研究领域:
光学材料
·
纳米光子学
·
温度传感
·
稀土发光
·
生物医学光学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 24
·5149-5157
·
IF 6.569
Weili Wang,Shao Yan,Yanjie Liang,Dongxun Chen,Fang Wang,Jingwei Liu,Yi Zhang,Kangning Sun,Dongqi Tang
Near-infrared (NIR) persistent phosphors have attracted extensive research interest owing to their distinct wavelength features and self-sustained luminescence properties. However, the high-energy ultraviolet light that is consistently used to charge these phosphors has compromised some promising applications, especially for biomedical imaging. Herein, we have successfully utilized long-wavelength 635 nm red-light to achieve intense NIR persistent luminescence in a MgGeO3:Mn2+,Yb3+ phosphor. Seconds to minutes of 635 nm red-light charging can result in long-lasting NIR afterglow at around 680 nm for longer than 12 h. The photon trapping and detrapping processes in the MgGeO3:Mn2+,Yb3+ phosphor were investigated in detail by varying the 635 nm red laser output power and the excitation duration, which indicate that a two-photon upconversion charging process is responsible for NIR persistent luminescence upon red-light illumination. The red-light-charging capability and self-sustained NIR luminescence properties make this material perfectly suited to applications across a wide number of fields, such as acting as ideal optical probes for deep-tissue bio-imaging and developing optical data storage technology for information security systems.
研究领域:
材料科学
·
生物医学成像
·
光学存储
·
光子学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 18
·32662-32669
·
IF 5.1
Li Li,Haoliang Yang,Yongjie Wang,Xianju Zhou,Faling Ling,Huajing Gao,Zhiyu Yang,Xiantong Tang,Yongbin Hua
The development of medical, military, and other fields has greatly increased the demand for broadband near-infrared light sources . This article reports that Sr 3 Sc 2 Ge 3 O 12 : Cr 3+ (SSGO: Cr 3+ ), a broadband near-infrared phosphor with 850 nm as the luminescence center, has an emission spectrum covering 700–1200 nm and a full width at half maximum (FWHM) of 125 nm under 490 nm excitation. To further increase the FWHM value, Yb 3+ is introduced into the phosphor of SSGO: Cr 3+ to enable energy transfer from Cr 3+ to Yb 3+ . After doping 1 % of Yb 3+ onto the Sr 2+ site, the near-infrared emission generated by the 4 A 2 → 4 T 1 (4P) transition of Cr 3+ and the near-infrared emission generated by the 2 F 5/2 → 2 F 7/2 transition of Yb 3+ work so that the FWHM increases to 220 nm. In addition, the thermal stability of the phosphor after co-doping with Yb 3+ is also greatly enhanced from 61.6 % to 75.1 % by comparing it to the Cr 3+ single-doped sample. In addition, SSGO:0.08Cr 3+ , 0.01 Yb 3+ was combined with a commercial 490 nm chip to prepare a broadband near-infrared light-emitting diode (pc-LED).
研究领域:
材料科学
·
光学材料
·
光子学
·
固态照明
·
能量传递
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 89
·56229-56238
·
IF 3.108
Wei Wang,Yunxi Li,Shanshan Hu,Xuemei Zhang,Jianfeng Tang,Jun Yang
Ba3Sc2F12:Yb3+, Ln3+ (Ln = Er, Ho, Tm) crystals with various morphologies have been synthesized via a one step hydrothermal route. X-ray diffraction (XRD), scanning electron microscopy (SEM), and up conversion photoluminescence (UCPL) spectra were used to characterize the samples. The influences of surfactants, pH values, and molar ratio of F−/Sc3+ on the crystal phase, size and shape of final products have been studied in detail. The aspect ratio of products increased gradually with the increase of F−/Sc3+ molar ratio. Additionally, the luminescence properties of Ba3Sc2F12:Yb3+, Ln3+ (Ln = Er, Ho, Tm) crystals were systematically studied. The blue emission is attributed to the 1G4 → 3H6 transition of Tm3+; the green emission can be obtained due to the 2H11/2/4S3/2 → 4I15/2 transitions of Er3+ and the 5S2/5F4 → 5I8 transition of Ho3+; the red emission comes from the 4F9/2 → 4I15/2 transition of Er3+ and the 1G4 → 3F4 transition of Tm3+. Based on the generation of red, green, and blue emissions in the different Ln ion-doped Ba3Sc2F12, the white light emission can be obtained by appropriately doping Yb3+, Er3+, and Tm3+ in the present Ba3Sc2F12 crystals due to the color superposition principle. Here, the sample Ba3Sc1.5856F12:0.4Yb3+, 0.01Er3+, 0.0044Tm3+ crystals showed suitable intensity ratio of blue, green and red (RGB) emissions resulting in bright white light with CIE-x = 0.274 and CIE-y = 0.287, which was illustrated by a photograph under excitation of 980 nm. The prepared Ba3Sc2F12:Ln3+ phosphor has potential applications in the fields of three dimensional displays, back lighting and white light sources.
研究领域:
材料科学
·
光学材料
·
发光学
·
光子学
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2017
·Vol. 100
·期 7
·3061-3069
·
IF 2.841
Shaohua Fan,Shikai Wang,Hongtao Sun,Shiyu Sun,Guojun Gao,Lili Hu
We report efficient dual-mode up-conversion (UC) and down-shifting (DS) emission in a single Yb 3+ /Er 3+ -co-doped β-NaYF 4 microcrystals with controlled morphology and size via a simple Na + ion-exchange modification (IEM) method. IEM well preserves the crystal structure and monodispersed morphology of hydrothermal-synthesized β-NaYF 4 . Meanwhile, IEM gives rise to the significant enhancement of UC emission intensity up to 3800 times and strongly enhanced DS emission intensity of Er 3+ and Yb 3+ by several times in β-NaYF 4 :Yb 3+ ,Er 3+ microcrystals. IEM also strongly prolongs the DS emission lifetimes of Er 3+ and Yb 3+ in visible and near-infrared region. The enhanced UC and DS emission intensities and prolonged lifetimes in β-NaYF 4 :Yb 3+ ,Er 3+ are mainly ascribed to the dispersing of localized Yb 3+ and Er 3+ clusters during IEM.
研究领域:
材料科学
·
光子学
·
纳米技术
·
光学材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）