Eu2+ Luminescence in KY3F10

Boulon, G.; Gâcon, J.C.; Trottier, D.; Vedrine, A.

doi:10.1002/pssb.2220930236

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…This weak-field scheme occurs where Eu 2+ ion is substituted for larger cations at highly coordinated sites surrounded by small and highly charged cations. 50 Some examples of this type of phosphors (type Eu2-A) are: Ba 2 Mg 3 F 10 :Eu 2+ , 51 BaMg(SO 4 ) 2 :Eu 2+ , 52 BaY 2 F 8 :Eu 2+ , 53 Be 2 MSi 2 O 7 (M = Sr, Ba):Eu 2+ , 54 KMgF 3 :Eu 2+ , 55 LiBaF 3 :Eu 2+ , 37,56 LiMgPO 4 :Eu 2+ , 57 MM'AlF 7 :Eu 2+ (M, M' = Ca, Sr, Ba), 58 MFCl (M = Sr, Ba):Eu 2+ , 59 MFX (M = Sr, Ba; X = Cl, Br):Eu 2+ , 60 MSO 4 :Eu 2+ (M = Ca, Sr, Ba), 61 SrAlF 5 :Eu 2+ , 62 SrAl 12 O 19 :Eu 2+ , 63,64 SrB 4 O 7 :Eu 2+ , 65,66 and RbMgF 3 :Eu 2+ . 67 The weak crystal-field splitting scheme for the electronic energy levels in Eu 2+ ion is schematically shown in Fig.…”

Section: Experimental Data Analysis: Type Eu2-a Phosphormentioning

confidence: 99%

Review—Photoluminescence Spectroscopy of Eu²⁺-Activated Phosphors: From Near-UV to Deep Red Luminescence

Adachi¹

2023

ECS J. Solid State Sci. Technol.

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In this review article, the characteristic luminescence behaviors of the Eu2+-activated phosphors are discussed from a spectroscopic point of view. This spectroscopic point of view makes possible to classify the Eu2+-activated phosphors into two groups: types Eu2-A and Eu2-B, where an energy inequality relation of the lowest excited state of type Eu2-A to be given by 4f 7 (6 P 7/2)→4f 65d, whereas that of type Eu2-B is given by 4f 7 (6 P 7/2)→4f 65d. Simply saying, the 6 P 7/2 excited manifold of the 4f 7 configuration is located just below and well above the lowest-energy 5d level of the Eu2+ ion in types Eu2-A and Eu2-B phosphors, respectively. While generally uncommon, in some host materials the 4f 7 (6 P 7/2)→ 4f 7 (8 S 7/2) intra-configurational transitions of Eu2+ occur with exhibiting the characteristic narrow-line emissions. An analysis method based on the Franck–Condon principle within the configurational-coordinate motel is proposed to exactly determine the lowest excited-state 4f 65d energy in both types of phosphors Eu2-A and Eu2-B. Thermal stability of the phosphor properties is of crucial importance and scientific interest. Therefore, key understandings of the temperature dependences of luminescence intensity and decay time in the Eu2+-activated phosphors are also presented as the additional and important concern in the present review article.

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Section: Experimental Data Analysis: Type Eu2-a Phosphormentioning

confidence: 99%

Review—Photoluminescence Spectroscopy of Eu²⁺-Activated Phosphors: From Near-UV to Deep Red Luminescence

Adachi¹

2023

ECS J. Solid State Sci. Technol.

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“…Potassium triyttrium decafluoride ( ) KY F 3 10 has attracted much attention and has been extensively studied because of its excellent optical properties [1,2] and potential applications in a wide range of fields: laser applications [2], scintillation [3] and display devices [4,5]. It also possesses low-maximum phonon frequency leading to a large number of potential emitting levels as well as high luminescent efficiency [6][7][8][9][10][11][12][13]. Compared to other low phonon energy materials such as chlorides, bromides, or sulphides, the fluorides present a reasonably high thermal conductivity, a good enough mechanical hardness, and a high chemical stability [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…It also possesses low-maximum phonon frequency leading to a large number of potential emitting levels as well as high luminescent efficiency [6][7][8][9][10][11][12][13]. Compared to other low phonon energy materials such as chlorides, bromides, or sulphides, the fluorides present a reasonably high thermal conductivity, a good enough mechanical hardness, and a high chemical stability [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Thermoluminescence and photoluminescence study of KY₃F₁₀:Ho³⁺commercial phosphor powder

2016

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Thermoluminescence (TL) and photoluminescence (PL) properties of KY 3 F 10 :Ho 3+ phosphor powder is reported. The TL measurements were carried out for different heating rates and for various durations of UV exposure. The TL intensity increases with the duration of UV exposure up to 20 min and then decreases. A decrease of the glow peak height was observed for the glow curves with an increasing heating rate. The area under the TL-time plot is calculated for each heating rate at a constant UV dose and it is found to be constant and independent of the heating rate. It is found that the observed decrement in intensity of each glow curve following an increment in the heating rate is not attributed to the thermal quenching effect. Important TL kinetic parameters namely, the activation energy (E) and the frequency factor (s) were calculated using a variable heating rate (VHR) method. The glow peaks obey first order kinetics. PL emission spectra were also investigated at four main excitation wavelengths; namely, 362, 416, 454 and 486 nm. Green emission at 540 nm and faint red emission at 750 nm were observed for all the excitations. The green emission at 540 nm is ascribed to the 5 F 4 -5 I 8 and 5 S 2 -5 I 8 transitions and the faint red emission at 750 nm is due to the 5 F 4 -5 I 7 and 5 S 2 -5 I 7 transitions. In addition to the sharp green emission at 540 nm, a broad emission centered at 600 nm was observed for excitation wavelength of 362 nm.

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“…There has been considerable interest in Eu2+ ions doped in different compounds for various applications such as high energy laser windows and luminescent and phosphor materials (1)(2)(3)(4)(5)(6)(7). Doping alkali halides with Eu2+ ions results in the formation of an impurity-vacancy complex that strengthens the crystal.…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence, fluorescence, and optical absorption studies on single crystals of rubidium iodide doped with Eu²⁺

Tan¹,

Sapru²,

Sastry³

1985

Can. J. Phys.

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Thermoluminescence, optical absorption, and fluorescence studies on the Rb1:Eu2+ system indicate that the Eu2+ ions act as donors on irradiation and thereby convert to the Eu3+ ions. On thermal and (or) optical treatment the electrons released are captured back. The integrated light intensity of the system is an order of magnitude higher than that of the undoped samples. Fluorescence measurements show an emission around 2.83 eV. Thermoluminescence emission spectra give two emission bands peaking around 2.48 and 2.83 eV. A tentative energy band diagram is suggested explaining these emissions. Excitation of irradiated samples with F light is used to support this model. Des Ctudes de thermoluminescence, d'absorption optique et de fluorescence sur le systkme Rb1:Eu2+ indiquent que les ions Eu2+ agissent comme donneurs lors de I'irradiation et se transforment par consequent en ions Eu3+. Lors de traitement thermal et (OU) optique, les Clectrons libirks sont recapturCs. L'intensitC lumineuse intCgrCe du systkme dCpasse par un ordre de grandeur celle qui provient des Cchantillons non dopes. Les mesures de fluorescence montrent une emission autour de 2,83 eV. Le spectre d'Cmission thermoluminescence comporte deux bandes dont les maxima se situent autour de 2,48 eV et de 2,83 eV. On propose a titre d'essai un diagramme de bandes d'Cnergie expliquant ces Crnissions. L'excitation des Cchantillons irradiCs par lumikre F est utilisCe pour Ctayer ce modkle.[Traduit par le journal]Can.

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Eu²⁺ Luminescence in KY₃F₁₀

Cited by 12 publications

References 6 publications

Review—Photoluminescence Spectroscopy of Eu²⁺-Activated Phosphors: From Near-UV to Deep Red Luminescence

Review—Photoluminescence Spectroscopy of Eu²⁺-Activated Phosphors: From Near-UV to Deep Red Luminescence

Thermoluminescence and photoluminescence study of KY₃F₁₀:Ho³⁺commercial phosphor powder

Thermoluminescence, fluorescence, and optical absorption studies on single crystals of rubidium iodide doped with Eu²⁺

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Eu2+ Luminescence in KY3F10

Cited by 12 publications

References 6 publications

Review—Photoluminescence Spectroscopy of Eu2+-Activated Phosphors: From Near-UV to Deep Red Luminescence

Review—Photoluminescence Spectroscopy of Eu2+-Activated Phosphors: From Near-UV to Deep Red Luminescence

Thermoluminescence and photoluminescence study of KY3F10:Ho3+commercial phosphor powder

Thermoluminescence, fluorescence, and optical absorption studies on single crystals of rubidium iodide doped with Eu2+

Contact Info

Product

Resources

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Eu²⁺ Luminescence in KY₃F₁₀

Review—Photoluminescence Spectroscopy of Eu²⁺-Activated Phosphors: From Near-UV to Deep Red Luminescence

Review—Photoluminescence Spectroscopy of Eu²⁺-Activated Phosphors: From Near-UV to Deep Red Luminescence

Thermoluminescence and photoluminescence study of KY₃F₁₀:Ho³⁺commercial phosphor powder

Thermoluminescence, fluorescence, and optical absorption studies on single crystals of rubidium iodide doped with Eu²⁺