Ho3+ doped fluoride thin film was deposited on common glass matrix by low energy pulse laser (532 nm, quadratic harmonics of Nd: YAG laser). Red and green upconversion luminescences with central wavelength of 770 and 540 nm have been observed through Japan R-500 spectrometer with excitation of 632.8 nm He-Ne laser. These upconverted emissions are ascribed to transitions of 5S2-->5I7, 5F4-->5I7 and 5S2-->5I8 and they are realized by two step absorption of Ho3+ ions and energy transfer among Ho3+ ions.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
An Emerging Toolkit of Ho Sensitized Lanthanide Nanocrystals with NIR-II Excitation and Emission for Bioimaging.
J Am Chem Soc
January 2025
Department of Chemistry, Laboratory of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China.
Optical imaging in the second near-infrared window (NIR-II, 1000-1700 nm) holds great promise for biomedical detection due to reduced tissue scattering and autofluorescence. However, the rational design of NIR-II probes with superior excitation wavelengths to balance the effects of tissue scattering and water absorption remains a great challenge. To address this issue, here we developed a series of Ho-sensitized lanthanide (Ln) nanocrystals (NaYF: Ho, Ln@NaYF) excited at 1143 nm, featuring tunable emissions ranging from 1000 to 2200 nm for bioimaging.
View Article and Find Full Text PDFEngineering dual-mode near-infrared ratiometric thermometers based on rare earth-doped molybdates.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, China. Electronic address:
Near-infrared optical thermometers have sparked great interest for their ability to provide non-destructive testing and high-resolution. However, the restricted relative sensitivity and single temperature measurement mode represent the current limitations of luminescent thermometers. Herein, near-infrared dual-mode ratiometric thermometers with high sensitivity in La(MoO): Yb, Ln (LMO: YbLn, Ln = Er, Ho, Nd) phosphors were designed.
View Article and Find Full Text PDFA multiband NIR upconversion core-shell design for enhanced light harvesting of silicon solar cells.
Light Sci Appl
November 2024
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 130012, Changchun, China.
Exploring lanthanide light upconversion (UC) has emerged as a promising strategy to enhance the near-infrared (NIR) responsive region of silicon solar cells (SSCs). However, its practical application under normal sunlight conditions has been hindered by the narrow NIR excitation bandwidth and the low UC efficiency of conventional materials. Here, we report the design of an efficient multiband UC system based on Ln/Yb-doped core-shell upconversion nanoparticles (Ln/Yb-UCNPs, Ln= Ho, Er, Tm).
View Article and Find Full Text PDFUntypical tuneable emission activated by NIR radiation observed in gadolinium borate nanomaterials doped with Yb, Ho and Ce ions.
Sci Rep
November 2024
Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, Seminaryjna 3, Bydgoszcz, 85-326, Poland.
New luminescent nanoparticles with adjustable emission properties were synthesized via a hydrothermal method to investigate the effect of Ce concentration on the tuneable emission properties of Yb/Ho co-doped gadolinium borates. The synthesized samples' comprehensive structural and morphological analysis was conducted utilizing X-ray diffraction and transmission electron microscopy. To obtain highly crystalline nanoparticles GdBO:Yb/Ho/Ce characterized by intense and bright emission, they were annealed at 525 °C and 925 °C.
View Article and Find Full Text PDF∼2 μm broadband luminescence in Tm/Ho/Er-doped tellurite glass.
Spectrochim Acta A Mol Biomol Spectrosc
February 2025
Information Science and Engineering College, Ningbo University, Zhejiang 315211, China. Electronic address:
Improving the broadband luminescent properties in ∼2 μm band has always been a serious challenge. This paper proposed a Tm, Ho and Er doped combination in tellurite glass, which was synthesized through melt-quenching and characterized by a series of physical and spectral tests. Firstly, tellurite glass of Tm-Ho co-doping produced a ∼2 μm broadband luminescence ranging from 1570 to 2200 nm with FWHM (full width at half maximum) of 379 nm under 808 nm pumping.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!