VUV phosphors in the SrO–B2O3–P2O5 ternary system

Komatsu, Yasutaka; Komeno, Akira; Toda, Kenji; Uematsu, Kazuyoshi; Sato, Mineo

doi:10.1016/j.jallcom.2005.01.098

Cited by 11 publications

(5 citation statements)

References 13 publications

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confidence: 99%

“…Eu 2+ ion has the 4f 7 electron configurations in the ground state and the 4f 6 5d electron configuration in the excited state. The allowed 5d → 4f transitions from the 4f 6 5d configuration to the 4f 7 configuration give rise to broad emission band, which strongly depends on the strength of the crystal field produced by the crystalline environment of Eu 2+ ions. The reason for that is that the 5d electron shell is not screened like the 4f electron shell and, as such, can effectively interact with the nearest environment of the Eu 2+ ion incorporated into a host matrix.…”

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confidence: 99%

“…The luminescence properties and potential applications of Eu 2+ doped Sr 6 BP 5 O 20 for LED, PDP, and FED were reported earlier. [5][6][7][8][9][10] The first-principles calculations of the Sr 6 BP 5 O 20 electronic properties were described in Ref. 11.…”

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Electron-Vibrational Interaction in the 5d States of Eu²⁺Ions in Sr_6-xEu_xBP₅O₂₀(x = 0.01-0.15)

Hou

Liang

et al. 2014

ECS J. Solid State Sci. Technol.

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In the present paper we report on the combined experimental and theoretical study of the Sr 6-x Eu x BP 5 O 20 (x=0.01; 0.03; 0.05; 0.07; 0.09; 0.11; 0.13; 0.15) phosphors. Details of the samples preparation and spectroscopic measurements are followed by the analysis of the roomtemperature absorption and emission spectra, which yielded the main parameters of the electronphonon coupling, such as Huang-Rhys factor, Stokes shift, effective phonon energy, and zerophonon line position were determined for the first time for the studied system. The obtained parameters were used to model the emission band shapes, which perfectly reproduce the experimental results for all samples.

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Electron-Vibrational Interaction in the 5d States of Eu²⁺Ions in Sr_6-xEu_xBP₅O₂₀(x = 0.01-0.15)

Hou

Liang

et al. 2014

ECS J. Solid State Sci. Technol.

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“…As to where the Eu ions exist in the multiphase and multi-component system of borophosphate glass ceramics, we propose that the Eu ions in the glass-ceramics can exist in the sites of the glassy phase, the sites inside the nanocrystals and the sites localized at the interface between the crystal particles and the glassy phase [13][14][15][16][17] . With the amount of B 2 O 3 increases, the amount of Sr(PO 3 ) 2 crystal increases, which indicates the increase of Eu 2+ to substitute the more sites of Sr 2+ in the crystalline phase to intensify the blue emission.…”

Section: Fig4 Pl Spectra Of Blue-light and Red-light Borophosphate Gmentioning

confidence: 99%

Composition-induced valence variation of europium and the photoluminescence properties for Eu2+ doped borophosphate luminous glass in air

Qiu

Tian

et al. 2011

Optoelectron. Lett.

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A simultaneous blue-light and red-light emitting glass of SrO-B 2 O 3 -P 2 O 5 doped with Eu 2 O 3 is prepared in air, and then heat-treated without any reductive reagent. A transition combination is found to consist of a band emission peaked around 430 nm and a series of line emission from 593 nm to 611 nm, corresponding to the typical 4f 6 5d 4f 7 transition of Eu 2+ and 5 D 0 7 F J (J = 0, 1, 2, 3, 4) transitions of Eu 3+ , respectively. Some unidentified crystals such as Sr (PO 3 ) 2 and SrB 2 O 4 as hosts for Eu 2+ with more stronger crystal field lead to this enhancement of photoluminescence (PL) intensity superior to the asprepared parent glass.Luminous glass and glass-ceramics doped with rare earth (RE) ions have drawn much interest in a lot of applications. The borophosphate glasses doped with Eu 2+ can be applied in packaging light emitting diodes (LEDs) using GaN or InGaN chip [1,2] . Generally, a suitable reduction atmosphere of H 2 , H 2 /N 2 or CO is needed to obtain the broad band emission materials doped with the low valence stat REs.Fortunately, an abnormal phenomenon of low valence state of REs stabilized by some hosts has been widely observed in the absence of any reduction atmosphere [3][4][5][6][7] , But little attention is paid to the effect of crystallization on the photoluminescence (PL) in the variarle composition.As regards the rare-earth Eu doped SrO-B 2 O 3 -P 2 O 5 borophosphate glass prepared in air, we also observed abnormal valence state of Eu 2+ . We will concentrate our contents on the effect of crystallization on the PL of this glass ceramics with variable composition in comparison with the parent glass.The rare earth doped Sr-B-P-O glass samples are prepared by melting a mixture of high-purity oxides or salts including SrCO 3 , NH

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“…The emission of Eu 2+ is attributable to the transition 4f 6 5d 4f7 ( 8 S 7/2 ) of Eu 2+ ion which is parity-allowed and its emission strongly dependent on the type of host. Luminescence of europium ion in MBPO 5 phosphor (M=Sr, Ca, Ba) was studied by many researchers [12][13][14]. However, to our knowledge, there are no reported luminescence properties of BaBPO 5 : Eu prepared in pure argon atmosphere.…”

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confidence: 99%

Luminescence Properties of Europium Ion Doped Barium Borophosphate Phosphor

Kamal

Yusuf

Jailani

et al. 2015

AMR

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A series of BaBPO5phosphors doped with different concentration of Eu2+ions were synthesized by solid state reaction method. The reduction of Eu3+to Eu2+ions were obtained by heating in pure argon atmosphere. The structural properties were analyzed by using X-ray diffraction (XRD). Luminescence properties were measured at room temperature using photoluminescence (PL) spectroscopy and the effects of europium ion in the phosphor were investigated. The XRD results showed that crystal structure of the phosphor is hexagonal single phases. The addition of europium ions exhibit a broad emission band in the violet region peaking at 383 nm corresponding to transition of configuration state 4f65d à 4f7(8S7/2) of Eu2+ions. The emission intensity is affected by the concentration of Eu2+. The optimum intensity is observed for 0.2 mol % of Eu2+ion. The occurrence of emission lines in violet region indicates that this phosphor has potential in solid-state lighting application.

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VUV phosphors in the SrO–B2O3–P2O5 ternary system

Cited by 11 publications

References 13 publications

Electron-Vibrational Interaction in the 5d States of Eu²⁺Ions in Sr_6-xEu_xBP₅O₂₀(x = 0.01-0.15)

Electron-Vibrational Interaction in the 5d States of Eu²⁺Ions in Sr_6-xEu_xBP₅O₂₀(x = 0.01-0.15)

Composition-induced valence variation of europium and the photoluminescence properties for Eu2+ doped borophosphate luminous glass in air

Luminescence Properties of Europium Ion Doped Barium Borophosphate Phosphor

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VUV phosphors in the SrO–B2O3–P2O5 ternary system

Cited by 11 publications

References 13 publications

Electron-Vibrational Interaction in the 5d States of Eu2+Ions in Sr6-xEuxBP5O20(x = 0.01-0.15)

Electron-Vibrational Interaction in the 5d States of Eu2+Ions in Sr6-xEuxBP5O20(x = 0.01-0.15)

Composition-induced valence variation of europium and the photoluminescence properties for Eu2+ doped borophosphate luminous glass in air

Luminescence Properties of Europium Ion Doped Barium Borophosphate Phosphor

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Electron-Vibrational Interaction in the 5d States of Eu²⁺Ions in Sr_6-xEu_xBP₅O₂₀(x = 0.01-0.15)

Electron-Vibrational Interaction in the 5d States of Eu²⁺Ions in Sr_6-xEu_xBP₅O₂₀(x = 0.01-0.15)