Blue to NIR down-conversion in Tm3+/Yb3+-codoped fluorozirconate glasses compared to Pr3+/Yb3+ ion-pair

Maalej, Olfa; Łukowiak, Anna; Bouajaj, Adel; Chiasera, Alessandro; Righini, Giancarlo C.; Ferrari, Maurizio; Boulard, B.

doi:10.1016/j.jlumin.2017.09.021

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…As a result, the fluorescence lifetimes of the SiO 2 –Tb 3+ /PVP hybrid fibers is longer than that of the SiO 2 –Tb 3+ nanoparticles, improving the luminescence monochromaticity. However, the longer the fluorescence lifetime is, the greater the energy storage capacity [26,27].…”

Section: Resultsmentioning

confidence: 99%

Polyvinylpyrrolidone Nanofibers Encapsulating an Anhydrous Preparation of Fluorescent SiO2–Tb3+ Nanoparticles

et al. 2019

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A novel anhydrous preparation of silica (SiO2)-encapsulated terbium (Tb3+) complex nanoparticles has been investigated. The SiO2-Tb3+ nanoparticles are incorporated in electrospun polyvinylpyrrolidone hybrid nanofibers. Transmission electron microscopy confirms that Tb3+ complexes are uniformly and stably encapsulated in or carried by nanosilica. The influence of pH on the fluorescence of Tb3+ complexes is discussed. The properties, composition, structure, and luminescence of the resulting SiO2–Tb3+ hybrid nanoparticles are investigated in detail. There is an increase in the fluorescence lifetime of SiO2–Tb3+ nanoparticles and SiO2–Tb3+/polyvinylpyrrolidone (PVP) hybrid nanofibers compared with the pure Tb3+ complexes. Due to the enhanced optical properties, the fluorescent hybrid nanofibers have potential applications as photonic and photoluminescent materials.

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Section: Resultsmentioning

confidence: 99%

Polyvinylpyrrolidone Nanofibers Encapsulating an Anhydrous Preparation of Fluorescent SiO2–Tb3+ Nanoparticles

et al. 2019

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“…Oxyfluoride glasses and glass -ceramics combine advantages of both oxide and fluoride materials revealing high stability and low phonon energies, respectively [1][2]. Rare-earthdoped oxyfluoride materials are characterized frequently by effective luminescence, high transparency and efficient upconversion processes [3][4][5]. Incorporation of optically active ions into nanocrystalline fluoride precipitations is attractive method to enhance luminescence efficiency of the optical materials [6][7].…”

Section: Introductionmentioning

confidence: 99%

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Lisiecki

Ryba‐Romanowski

2020

Journal of Alloys and Compounds

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Optical, structural and morphological properties of Tm 3+ /Yb 3+ co-doped NaYF4-based nanoglass-ceramic and a precursor glass have been investigated. The controlled heat-treatment of multicomponent oxyfluoride glass at 640 o C for 2h was used to obtain crystalline precipitations. The differences in optical characteristics have been discussed analysing spectra recorded within wide VUV-VIS-NIR spectral range and considering relaxation dynamic of involved excited states. Optical spectra and luminescence decay curves were measured as a function of temperature in the range of 295-725 K. Based on up-converted emission spectra excited at 975 nm, temperature sensing properties of glass-ceramic were verified. The fluorescence intensity ratio between the up-converted emission bands located at around 795 nm (Tm 3+ : 3 H4-3 H6) and 695 nm (Tm 3+ : 3 F3,2-3 H6) was studied. The maximum relative temperature sensitivity was determined to be 0.35% K-1 at 445 K.

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“…For downconversion emission, activator Yb 3+ was doped into self-activated luminescence materials such as tungstates, vanadates, and nirobates. − An strong NIR emission was displayed because of energy migration from host to Yb 3+ . If the matrix with a large band gap ( E gap ) was not excited by UV light, Yb 3+ emission was obtained by codoping other activated ions such as Bi 3+ , Gd 3+ –Tb 3+ , Ce 3+ , Tm 3+ , Ho 3+ , and Er 3+ . Generally, there were two types of energy transfer (ET) modes, namely photons quantum cutting process: single step (I type) and cooperative (II type) ET.…”

Section: Introductionmentioning

confidence: 99%

Yb³⁺ Doping Monoclinic Lu₂WO₆: Near-Infrared Emission and Energy-Transfer Luminescence Mechanism

Zhang¹,

Xin²,

Zheng³

et al. 2018

J. Phys. Chem. C

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Upon 300 nm excitation, monoclinic Lu 2−x Yb x WO 6 (0 ≤ x ≤ 0.3) phosphors displayed concentration-dependent visible (vis) and near-infrared (NIR) luminescence with the strongest peak centers at about 450 and 970 nm. Rietveld refinement indicated that Yb occupancy numbers in three Lu sites depended closely on the impurity concentration. The scanning electron microscopy and transmission electron microscopy characterizations showed that all of the samples were aggregates of particles with different shapes and sizes. Through hybridized density functional theory calculation, this NIR emission was proposed to originate from electron transition in three unoccupied spin down 4f state of Yb 3+ with different energy positions in the forbidden band. Energy transfer from WO 6 6− to Yb 3+ was only a single-step transfer process according to a lifetime spectra and theoretical result. Therefore, Lu 2−x Yb x WO 6 can be used as light−light conversion layer in solar cell, and the first-principles calculation successfully explained the intrinsic nature of luminescence phenomenon.

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Blue to NIR down-conversion in Tm3+/Yb3+-codoped fluorozirconate glasses compared to Pr3+/Yb3+ ion-pair

Cited by 16 publications

References 29 publications

Polyvinylpyrrolidone Nanofibers Encapsulating an Anhydrous Preparation of Fluorescent SiO2–Tb3+ Nanoparticles

Polyvinylpyrrolidone Nanofibers Encapsulating an Anhydrous Preparation of Fluorescent SiO2–Tb3+ Nanoparticles

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Yb³⁺ Doping Monoclinic Lu₂WO₆: Near-Infrared Emission and Energy-Transfer Luminescence Mechanism

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Blue to NIR down-conversion in Tm3+/Yb3+-codoped fluorozirconate glasses compared to Pr3+/Yb3+ ion-pair

Cited by 16 publications

References 29 publications

Polyvinylpyrrolidone Nanofibers Encapsulating an Anhydrous Preparation of Fluorescent SiO2–Tb3+ Nanoparticles

Polyvinylpyrrolidone Nanofibers Encapsulating an Anhydrous Preparation of Fluorescent SiO2–Tb3+ Nanoparticles

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Yb3+ Doping Monoclinic Lu2WO6: Near-Infrared Emission and Energy-Transfer Luminescence Mechanism

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Yb³⁺ Doping Monoclinic Lu₂WO₆: Near-Infrared Emission and Energy-Transfer Luminescence Mechanism