Intense ultraviolet upconversion luminescence from YF3: Yb/Tm submicrorice

Tang, Jing; Yu, Mo; Wang, Enyan; Ge, Chunli; Chen, Zhirong

doi:10.1016/j.matchemphys.2018.01.017

Cited by 10 publications

(5 citation statements)

References 23 publications

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“…Under laser focus, the yellowish‐green emission from this sample was visible (inset Figure B). In case of Tm 3+ :Yb 3+ ‐codoped sample, emission bands in the red region of spectrum at 470, 653, and 685 nm corresponding to 1 G 4 → 3 H 6 , 1 G 4 → 3 F 4 , and 3 F 2 → 3 H 6 transitions, respectively, were located (Figure C) . The energy UC studies in all these samples were coinciding well with the transitions observed in photoluminescence measurements.…”

Section: Resultssupporting

confidence: 76%

Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO_1.5 (Ln = Er³⁺, Ho³⁺, Tm³⁺, and Yb³⁺)

et al. 2018

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To address the existing gap in the literature of upconversion studies involving thoria, samples of thoria doped with Ho3+‐Yb3+, Er3+‐Yb3+, and Tm3+‐Yb3+ were synthesized following epoxide gel method and were characterized. Fluorite structure of the doped samples was evident for the calcined samples from the corresponding xerogels as noticed in their powder X‐ray diffraction patterns. The presence of a sharp band near 460 cm−1 in the Raman spectra of all these samples supported the results from diffraction experiments. Intraconfigurational f‐f transitions of Ho3+, Er3+, and Tm3+ were present in the UV‐visible absorbance spectra of these samples. Both normal emission and upconversion emission from these samples have been studied. Emissions in all three basic colors were observed in the upconversion emission spectra. Two‐photon process was found to be responsible for the upconversion in these systems. Decay time measurements for these emissions were analyzed. This synthetic process was further extended to determine the extent of dissolution of heavier lanthanides and found that up to 50 mol% of Ho3+, Er3+ and 60 mol% of Tm3+, Yb3+ could be dissolved retaining fluorite structure. Creation of oxygen vacancies for these heavily doped specimens was quite encouraging and it could be useful as solid electrolytes in fuel cells.

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Section: Resultssupporting

confidence: 76%

Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO_1.5 (Ln = Er³⁺, Ho³⁺, Tm³⁺, and Yb³⁺)

et al. 2018

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“…There is the complete domination of the green band (transition 4 3/2 → 4 15/2 ) over the red band (transition 4 9/2 → 4 15/2 ), which is in contrast with Ref. (Xiang et al, 2015). If we look at the most dominant transitions of all prepared samples, we can notice that subcomponents of these bands, which occurred by the action of the crystal field, are spectrally well resolved.…”

Section: Upconversion Spectra Of Yf3: Yb/er; Yf3: Yb/tm and Yf3: Yb/homentioning

confidence: 70%

“…This confirms the good crystallinity of our samples. The ratio of the emission bands and the number of UC emission occurred in the spectra could vary depending on the concentration of lanthanide ions, the method of preparation of the samples, sample size, shape, and presented defects (Payrer et al, 2017, Tang et al, 2018, Weng et al, 2009. The scheme of the population of high-energy levels in the Er 3+ , Ho 3+ , Tm 3+ ions occurs through a well-known mechanism.…”

Section: Upconversion Spectra Of Yf3: Yb/er; Yf3: Yb/tm and Yf3: Yb/homentioning

confidence: 99%

“…As this topic is attractive, there are many methods of synthesis used (perhaps solvothermal and hydrothermal synthesis are the most frequent) to obtain samples of uniform dimension and regular morphology (Han et al, 2014, He et al, 2014, Xiang et al, 2015. In this, similar to our previous works (Aleksić et al, 2020(Aleksić et al, , Ćirić et al, 2020, we use the method of fluorination of appropriate oxides with ammonium hydrogen difluoride (NH4HF2).…”

Section: Introductionmentioning

confidence: 95%

“…Doping YF3 with different lanthanides leads to obtaining materials that can emit light of different colors such as green, red, blue, near UV and near-infrared, under the 980 nm laser excitation (De et al, 2007, Ding et al, 2013, Tang et al, 2018. The laser diode producing 980 nm light is an attractive and powerful excitation source, in contrast to its relatively low price.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural, magnetic and up-conversion properties of YF3: Yb/Ln (Ln = Er, Tm, Ho) solid solutions

Aleksić

Barudžija

Mitrić

et al. 2020

Facta Univ Phys Chem Technol

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In this paper, we investigated YF3: Yb/Er, YF3: Yb/Tm, and YF3: Yb/Ho solid solutions prepared by reaction of an appropriate amount of oxides with ammonium difluoride (NH4HF2) as a fluorinating agent. These samples were characterized by Xray diffraction (XRD), magnetic measurements, and up-conversion (UC) photoluminescence spectra. The results show that all samples are single-phase and crystallize in an orthorhombic crystal structure of the ?-YF3 structure type. Above 100 K, the measured molar magnetic susceptibility was fitted by the Curie-Weiss law and the average effective magnetic moments for the observed samples were obtained. All the samples showed pure paramagnetic behavior. When doped with lanthanide elements (Yb/Er, Yb/Tm, Yb/Ho), YF3 solid solutions can emit characteristic green, red, blue, and near IR light under the excitation of a 980 nm laser diode.

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A Review on the Applicability of Luminescent Phosphors and Effective Positioning in Dye‐Sensitized Solar Cells for Enhanced Performance and Stability

Muthu,

Gandhi,

Meenakshisundaram

et al. 2023

Solar RRL

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The narrow range of solar light absorption facilitated by the photoactive organic dyes has been restricting the significant development, and large‐scale applications of dye‐sensitized solar cells (DSSC). The major problem that limits the power conversion efficiency (PCE) of DSSC is the limitations of the organic dyes (light absorbers in DSSC) to absorb beyond the visible region of solar spectrum that resulting in lower PCE (≈13%) as compared with the commercialized technologies. Hence, the focus on developing efficient strategies to harvest the ultraviolet and infrared light regions of the solar spectrum and effective conversion into the absorption limit of dyes and thereby increasing the device performance and stability is the emerging technological development in DSSCs. Rare earth ion‐doped upconversion (UC) and downconversion (DC) phosphors are the most promising solutions for the prevalent issues of the liquid junction solar cells. This review will focus on the emerging strategies for the PCE enhancement of DSSC with UC and DC materials. An exclusive review on the facile approach of simultaneous usage of both the UC and DC phosphors and the effective positioning of these spectral conversion phosphors, to achieve highly stable DSSCs with superior PCE is provided.

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Intense ultraviolet upconversion luminescence from YF3: Yb/Tm submicrorice

Cited by 10 publications

References 23 publications

Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO_1.5 (Ln = Er³⁺, Ho³⁺, Tm³⁺, and Yb³⁺)

Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO_1.5 (Ln = Er³⁺, Ho³⁺, Tm³⁺, and Yb³⁺)

Structural, magnetic and up-conversion properties of YF3: Yb/Ln (Ln = Er, Tm, Ho) solid solutions

A Review on the Applicability of Luminescent Phosphors and Effective Positioning in Dye‐Sensitized Solar Cells for Enhanced Performance and Stability

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Intense ultraviolet upconversion luminescence from YF3: Yb/Tm submicrorice

Cited by 10 publications

References 23 publications

Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO1.5 (Ln = Er3+, Ho3+, Tm3+, and Yb3+)

Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO1.5 (Ln = Er3+, Ho3+, Tm3+, and Yb3+)

Structural, magnetic and up-conversion properties of YF3: Yb/Ln (Ln = Er, Tm, Ho) solid solutions

A Review on the Applicability of Luminescent Phosphors and Effective Positioning in Dye‐Sensitized Solar Cells for Enhanced Performance and Stability

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Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO_1.5 (Ln = Er³⁺, Ho³⁺, Tm³⁺, and Yb³⁺)

Optical property evaluation of thoria doped with heavier rare‐earth oxides LnO_1.5 (Ln = Er³⁺, Ho³⁺, Tm³⁺, and Yb³⁺)