Luminescent properties of Yb-doped monoclinic yttrium polyphosphates

Ternane, Riadh; Férid, Mokhtar; Guyot, Y.; Trabelsi‐Ayadi, Malika; Boulon, G.

doi:10.1016/j.jlumin.2007.09.007

Cited by 10 publications

(8 citation statements)

References 22 publications

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“…By fitting to a double exponential function, the longer lifetime corresponding to the Yb 3+ slow decay can be determined around 3.66 ms. This result is close to the decay lifetime of 5%Yb 3+ ‐doped Y (PO 3 ) 3 at T = 12 K 54 . This means that the Yb 3+ ion in Sc(PO 3 ) 3 have a high radiative efficiency of ∼100%.…”

Section: Resultssupporting

confidence: 78%

“…This excitation band could be a tail of the Yb 3+ charge transfer band or a defect absorption directly feeding the 2 F 5/2 level of Yb 3+ . 44,54 Based on the same synthesis procedure, a series of Sc 0.90-y (PO 3 ) 3 :0.10Cr 3+ , yYb 3+ (y = 0, 0.005, 0.01, 0.05, 0.10, 0.15, 0.20) phosphors with the monoclinic structure of Sc(PO 3 ) 3 were successfully prepared (see Figure S8). Figure 5A depicts the NIR emission spectra for the samples with Yb 3+ concentration varying from 0 to 0.20, collected at the room temperature under excitation at 480 nm.…”

Section: Enhancement Of Nir Emission and Thermal Stability By Codoped...mentioning

confidence: 99%

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A broadband near‐infrared Sc₁₋_x(PO₃)₃:XCr³⁺ phosphor with enhanced thermal stability and quantum yield by Yb³⁺ codoping

Sheng

Chen

et al. 2022

J Am Ceram Soc

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Broadband near-infrared (NIR) phosphors converted light-emitting diodes (pc-LEDs) have attracted tremendous attention for their great potential in NIR spectroscopy applications. Herein, we report on the photoluminescence (PL) properties of Cr 3+ -doped Sc(PO 3 ) 3 , which exhibits a broadband NIR emission centered at 900 nm with a full width at half-maximum (FWHM) of 161 nm upon excitation at 480 nm. In terms of the examination of spectroscopic parameters, we find that Cr 3+ ions occupy a weak crystal field site (Dq/B = 1.94) in the Sc(PO 3 ) 3 host with a stronger electron-phonon coupling (Huang-Rhys factor, S = 5.5), which results in a serious thermal quenching and a low internal quantum efficiency (IQE). Thermal stability and IQE of phosphors can be substantially enhanced by the introduction of Yb 3+ ions. In the light of the analysis of excited-state dynamics, we demonstrate that the enhancement mechanism is ascribed to the efficient Cr 3+ →Yb 3+ energy transfer from the thermal sensitive Cr 3+ centers to the thermal stable Yb 3+ emitters. An NIR pc-LED device has been finally fabricated by the combination of a blue-emitting chip and a Cr 3+ /Yb 3+ codoped Sc(PO 3 ) 3 phosphor whose potential application for broadband NIR pc-LEDs is also discussed. K E Y W O R D Sbroadband near-infrared, Cr 3+ , energy transfer, phosphor-converted LED, Sc(PO 3 ) 3

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Section: Resultssupporting

confidence: 78%

Section: Enhancement Of Nir Emission and Thermal Stability By Codoped...mentioning

confidence: 99%

A broadband near‐infrared Sc₁₋_x(PO₃)₃:XCr³⁺ phosphor with enhanced thermal stability and quantum yield by Yb³⁺ codoping

Sheng

Chen

et al. 2022

J Am Ceram Soc

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“…Such an energy transfer between two sites is reported by Ternane et al in a monoclinic yttrium polyphosphate. [5,8] The challenge is to explain why the luminescent study of the LLnB single crystals reveals the existence of two lines in the expected zero-line transition range. Different assumptions are discussed below.…”

Section: Luminescence Spectroscopymentioning

confidence: 99%

“…Moreover, strong couplings of the ytterbium ion's 4f electrons with some lattice vibrations lead to vibronic sidebands and sometimes, additional Stark-level splitting. [8] Furthermore, it is quite complicated to correctly interpret the different bands because of high electron-phonon coupling. In Yb-doped YAG, several sets of assignment were proposed and discussed.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

et al. 2011

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Synthesized powders and grown single crystals of nominal compositions Li(6)Ln(BO(3))(3):Yb(3+) (Ln=Y, Gd) were investigated by means of powder and single-crystal X-ray diffraction (XRD), as well as optical near-IR spectroscopy in conjunction with electron paramagnetic resonance (EPR) spectroscopy. The appearance of two distinct zero-phonon lines suggests the existence of two kinds of Yb(3+) ions in the single crystals. The XRD results exclude the possibility of a phase transition occurring between room and low temperatures. EPR spectra of single crystals show the presence of both isolated ions and pairs of ytterbium ions substituted for Y(3+). A strong temperature dependence of the intensity of Yb-Yb pairs resonance lines coincides with temperature dependence of emission peak at 978 nm, confirming a common origin of the defect giving rise to these spectra. Calculated from EPR spectra, the distance between pairs of Yb(3+) is in good agreement with crystallographic ones: R=3.856 Å, R(cryst) =3.849 Å.

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“…The compound CsPrP 4 O 12 was used in scintillators [2]. Glassy phosphates are also used as laser materials such as NaPO 3 , Al(PO 3 ) 3 doped with Nd 3+ [3][4] ions, Y(PO 3 ) 3 doped with Yb 3+ ions [5]. They are also used in medicine, as optical tracers or in the treatment of cancer by target molecule [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Thermal Behavior of HYP2O7·3H2O Electrical Properties of HYP2O7

Zrelli¹,

Chehimi-Moumen²,

Hassen‐Chehimi³

et al. 2021

Preprint

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The synthesis of the diphosphate HYP2O7·3H2O was made via soft chemistry route from evaporation of aqueous solution at room temperature. The obtained compound, was characterized by means of X-ray diffraction (XRD) and infrared spectroscopy (IR). The results showed a high purity phase. IR spectrum of this diphosphate revealed usual signals related to P2O7 diphosphate group and water molecules. The thermal decomposition of the synthesized product by DTA / TG proceeded through four stages leading to the formation of the Y2P4O13 as a final product. On the other hand, its decomposition by CRTA took place in three stages leading to the formation of the anhydrous diphosphate HYP2O7 as a final product. X-ray powder diffraction and infrared spectroscopy were used to identify these materials. Furthermore the electrical properties of the HYP2O7 were investigated through impedance complex analysis. Modest conductivity has been observed in this material at relatively medium temperature range. Activation energy of 0.67 and 1.44 eV, was deduced from the corresponding Arrhenius plot.The optical band gap of the title compound is calculated and found to be 2.71 eV.

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Luminescent properties of Yb-doped monoclinic yttrium polyphosphates

Cited by 10 publications

References 22 publications

A broadband near‐infrared Sc₁₋_x(PO₃)₃:XCr³⁺ phosphor with enhanced thermal stability and quantum yield by Yb³⁺ codoping

A broadband near‐infrared Sc₁₋_x(PO₃)₃:XCr³⁺ phosphor with enhanced thermal stability and quantum yield by Yb³⁺ codoping

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals

Synthesis, Characterization and Thermal Behavior of HYP2O7·3H2O Electrical Properties of HYP2O7

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Luminescent properties of Yb-doped monoclinic yttrium polyphosphates

Cited by 10 publications

References 22 publications

A broadband near‐infrared Sc1−x(PO3)3:XCr3+ phosphor with enhanced thermal stability and quantum yield by Yb3+ codoping

A broadband near‐infrared Sc1−x(PO3)3:XCr3+ phosphor with enhanced thermal stability and quantum yield by Yb3+ codoping

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li6Ln(BO3)3:Yb3+ (Ln=Gd, Y) Borate Single Crystals

Synthesis, Characterization and Thermal Behavior of HYP2O7·3H2O Electrical Properties of HYP2O7

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A broadband near‐infrared Sc₁₋_x(PO₃)₃:XCr³⁺ phosphor with enhanced thermal stability and quantum yield by Yb³⁺ codoping

A broadband near‐infrared Sc₁₋_x(PO₃)₃:XCr³⁺ phosphor with enhanced thermal stability and quantum yield by Yb³⁺ codoping

Correlation between Luminescence and EPR Spectroscopy as Evidence of Ytterbium Pair Formation in Li₆Ln(BO₃)₃:Yb³⁺ (Ln=Gd, Y) Borate Single Crystals