Green-emissive transparent BaSi2O5:Eu2 + film phosphor on quartz glass created by a sputtering thermal diffusion process

Seo, Kyung-Han; Park, J.H.; Kim, J.S.; Na, Y.H.; Choi, Jae Chan; Bae, Jong‐Sup

doi:10.1016/j.ssc.2009.05.038

Cited by 15 publications

(7 citation statements)

References 14 publications

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“…As seen, the spectra show a great similarity except for the luminescence intensity, which resulted from the same dominant phase Ba 2.85 Eu 0.15 Si 6 O 12 N 2 . As the orthosilicates have no luminescence under blue light irradiation, 31,41,42 they only have an influence on the luminescence intensity of the phosphor. The strongest luminescence is observed when Si/Ba is equal to 2.08.…”

Section: Dalton Transactions Papermentioning

confidence: 99%

Synthesis of the phase pure Ba₃Si₆O₁₂N₂:Eu²⁺ green phosphor and its application in high color rendition white LEDs

Xie

Zhou

et al. 2014

Dalton Trans.

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The promising green oxynitride phosphor, Ba3Si6O12N2:Eu(2+), was synthesized at 1350 °C for 5 hours under a reducing N2/H2 (5%) atmosphere by using the solid-state reaction method. The phase purity was investigated by varying the nominal compositions, and the pure phase was achieved by carefully controlling the Si/Ba and O/Ba ratios. The phosphor displayed a broad excitation band spanning from the ultraviolet (UV) to the blue spectral region, and showed a single symmetrical emission band peaking at 525 nm with a full width at half maximum (FWHM) of ∼ 68 nm. The as-prepared green phosphor exhibited a small thermal quenching, which remained 90% of the initial emission intensity when measured at 200 °C. The internal and external quantum efficiencies measured under 450 nm excitation were 68 and 38%, respectively. Color temperature-tunable white LEDs with a high color rendering index of Ra = 88-94 were attained by combining the prepared green phosphor and a red phosphor Sr2Si5N8:Eu(2+) with a blue LED chip.

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Section: Dalton Transactions Papermentioning

confidence: 99%

Synthesis of the phase pure Ba₃Si₆O₁₂N₂:Eu²⁺ green phosphor and its application in high color rendition white LEDs

Xie

Zhou

et al. 2014

Dalton Trans.

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“…Many studies on Eu 2+ -activated silicates have been published [12][13][14], e.g., SrSiO 3 :Eu 2+ [15], Sr 2 SiO 4 :Eu 2+ [16], M 3 SiO 5 :Eu 2+ (M = Sr, Ba) [17], MSi 2 O 5 :Eu 2+ (M = Ca, Sr, Ba) [18], SrCaSiO 4 Gunawardane and Glasser [27] first reported the basic crystallographic data of unit cell parameters of K 4 CaSi 3 O 9 . Recently, Arroyabe et al [28] have investigated the detailed crystal structure of K 4 CaSi 3 O 9 by X-ray diffraction techniques and Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

A new yellowish-green-emitting phosphor: Eu2+-doped K4CaSi3O9

Yuan

Wang

Tsuboi

et al. 2012

Journal of Alloys and Compounds

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“…Upon 340 nm UV excitation, the emission spectrum presents a symmetric broad band extending from 400 to 600 nm with a peak at approximately 498 nm, which is ascribed to the Eu 2+ 4f 6 5d 1 → 4f 7 allowed transition. 43 The full width at halfmaximum (fwhm) is approximately 104 nm. The dependence of emission intensity for Ba 3−m Si 6 O 15 :mEu 2+ phosphors on Eu 2+ concentration (m) are presented in Figure 5b.…”

Section: Resultsmentioning

confidence: 99%

“…Because the host absorption is below 300 nm, as shown in Figure S7, the broad absorption band from 200 to 400 nm in the excitation spectrum is derived from the allowed 4f 7 → 5d transition of Eu 2+ . Upon 340 nm UV excitation, the emission spectrum presents a symmetric broad band extending from 400 to 600 nm with a peak at approximately 498 nm, which is ascribed to the Eu 2+ 4f 6 5d 1 → 4f 7 allowed transition . The full width at half-maximum (fwhm) is approximately 104 nm.…”

Section: Resultsmentioning

confidence: 99%

Influence of Anion/Cation Substitution (Sr²⁺ → Ba²⁺, Al³⁺ → Si⁴⁺, N^3– → O^2–) on Phase Transformation and Luminescence Properties of Ba₃Si₆O₁₅:Eu²⁺ Phosphors

et al. 2017

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A series of promising cyan, green, and yellow emission (Ba, Sr) 3 (Si, Al) 6 (O, N) 15 :Eu 2+ phosphors were synthesized by a Pechini-type sol−gel ammonolysis method. Variations in luminescence properties and crystal structure caused by the modification of phosphor composition were studied in detail. The prefired temperatures of the precursors play a key role in the process of forming the final products. Under UV light excitation, the as-prepared Ba 3 Si 6 O 15 :Eu 2+ phosphor presents a strong cyan emission located at 498 nm. Moreover, the as-prepared oxynitride phosphors, Eu 2+activated (Ba 1−y Sr y ) 3 Si 6−x Al x O 15−μ N δ (x = 0−1.2, y = 0−0.6), display a broader excitation band covering the entire visible region. Under blue light excitation, Ba 3 Si 6−x Al x O 15−μ N δ :Eu 2+ phosphors show a intense and narrow green emission at 520 nm, and the luminescent intensity can be enhanced by increasing Al content within a certain range. However, (Ba 1−y Sr y ) 3 Si 6 O 15−μ N δ :Eu 2+ phosphors exhibit green (520 nm) to yellow (554 nm) emission with increasing Sr content. Unexpectedly, Eu 2+ doped Ba 3 Si 6 O 9 N 4 -type Ba 3 Si 6 O 15−μ N δ −1300 °C phosphor exhibits a bluish green emission and strong thermal quenching behavior. The (Ba 1−y Sr y ) 3 Si 6−x Al x O 15−μ N δ :Eu 2+ phosphors exhibit a small thermal quenching, and the quantum yields measured under 460 nm excitation could reach up to 89% for green Ba 3 Si 6−x Al x O 15−μ N δ :Eu 2+ phosphor and 71% for yellow (Ba 1−y Sr y ) 3 Si 6x O 15−μ N δ :Eu 2+ phosphor. White LEDs with tunable color temperature and higher color rendering index were fabricated by combining the prepared cyan Ba 3 Si 6 O 15 :Eu 2+ /green Ba 2.91 Eu 0.09 Si 6−x Al x O 15−μ N δ (x = 0.06)/yellow (Ba 0.97−y Sr y ) 3 Eu 0.09 Si 6 O 15−μ N δ (y = 0.4) phosphor and a red phosphor with a UV or blue LED chip, indicating that they are promising phosphors for white LEDs.

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Green-emissive transparent BaSi2O5:Eu2 + film phosphor on quartz glass created by a sputtering thermal diffusion process

Cited by 15 publications

References 14 publications

Synthesis of the phase pure Ba₃Si₆O₁₂N₂:Eu²⁺ green phosphor and its application in high color rendition white LEDs

Synthesis of the phase pure Ba₃Si₆O₁₂N₂:Eu²⁺ green phosphor and its application in high color rendition white LEDs

A new yellowish-green-emitting phosphor: Eu2+-doped K4CaSi3O9

Influence of Anion/Cation Substitution (Sr²⁺ → Ba²⁺, Al³⁺ → Si⁴⁺, N^3– → O^2–) on Phase Transformation and Luminescence Properties of Ba₃Si₆O₁₅:Eu²⁺ Phosphors

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Green-emissive transparent BaSi2O5:Eu2 + film phosphor on quartz glass created by a sputtering thermal diffusion process

Cited by 15 publications

References 14 publications

Synthesis of the phase pure Ba3Si6O12N2:Eu2+ green phosphor and its application in high color rendition white LEDs

Synthesis of the phase pure Ba3Si6O12N2:Eu2+ green phosphor and its application in high color rendition white LEDs

A new yellowish-green-emitting phosphor: Eu2+-doped K4CaSi3O9

Influence of Anion/Cation Substitution (Sr2+ → Ba2+, Al3+ → Si4+, N3– → O2–) on Phase Transformation and Luminescence Properties of Ba3Si6O15:Eu2+ Phosphors

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Synthesis of the phase pure Ba₃Si₆O₁₂N₂:Eu²⁺ green phosphor and its application in high color rendition white LEDs

Synthesis of the phase pure Ba₃Si₆O₁₂N₂:Eu²⁺ green phosphor and its application in high color rendition white LEDs

Influence of Anion/Cation Substitution (Sr²⁺ → Ba²⁺, Al³⁺ → Si⁴⁺, N^3– → O^2–) on Phase Transformation and Luminescence Properties of Ba₃Si₆O₁₅:Eu²⁺ Phosphors