Photoluminescence properties of Sr1–xSi2O2N2: Eu2+x as green to yellow-emitting phosphor for blue pumped white LEDs

Song, Young Hoon; Park, W.J.; Yoon, Dae–Ho

doi:10.1016/j.jpcs.2009.12.014

Cited by 19 publications

(10 citation statements)

References 20 publications

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“…The critical concentration of Eu 2+ was thus 0.07. For SrSi 2 O 2 N 2 :Eu 2+ , this critical concentration was higher than the value (0.02) reported by Song et al but lower than the value (0.15) reported by Yoon and coworkers . Partial replacement of Sr 2+ by Eu 2+ significantly affected the peak position.…”

Section: Resultscontrasting

confidence: 54%

Highly enhanced luminescence of SrSi₂O₂N₂:Eu²⁺ phosphors by Mg²⁺ substitution and their application in pc‐LED

Lee

Kim

et al. 2013

Physica Status Solidi (a)

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The effect of substitution of Sr2+ by Mg2+ on the luminescence properties of (Sr0.9 − xMgx)Si2O2N2:0.1Eu2+ were investigated as a function of the concentration of Mg2+(x). The peak position of the yellowish green emission from (Sr0.9 − xMgx)Si2O2N2:0.1Eu2+ was invariant with x. However, the luminescence intensity was significantly affected by x. With increasing Mg2+ concentration, the intensity increased to a maximum at x = 0.1. Partial substitution of Sr2+ by Mg2+ enhanced the intensity 1.8‐fold. The Eu2+ concentration affected the peak positions of both luminescence and excitation. With increasing Eu2+ concentration, the red‐shifting and enhancement of the luminescence were associated with the nephelauxetic effect. Concentration quenching of the luminescence occurred above y = 0.07 in the (Sr0.8 − yMg0.1)Si2O2N2:yEu2+. Above the critical concentration of Eu2+, non‐radiative transitions between adjacent Eu2+ ions were more effective than the nephelauxetic effect. Optimized (Sr0.83Mg0.1)Si2O2N2:0.07Eu2+ phosphors were fabricated with blue GaN LED and the chromaticity index of the phosphor‐formulated GaN LED was investigated as a function of the wt% of the optimized phosphor.

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Section: Resultscontrasting

confidence: 54%

Highly enhanced luminescence of SrSi₂O₂N₂:Eu²⁺ phosphors by Mg²⁺ substitution and their application in pc‐LED

Lee

Kim

et al. 2013

Physica Status Solidi (a)

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“…Presently, the most popular white LED is a mixture of an InGaN blue chip with yellow phosphor of YAG:Ce 3+ [3]. This phosphor shows excellent quantum efficiency but because of a low rendering index (CRI) value and high color temperature cannot be applied as an indoor illumination [4]. This problem can be solved if YAG:Ce phosphor is replaced by nitrides and/or oxynitrides because of their excellent properties, such as chemical and thermal stability, non-toxicity and high luminescence emission and excitation with rare earth (RE) ions [5].…”

Section: Introductionmentioning

confidence: 99%

“…Especially, SrSi 2 O 2 N 2 phosphor activated with Eu 2+ is very interesting because of its ability to emit greenish-yellow light under UV-blue radiation [6][7]. Furthermore, the emission color of this phosphor can be controlled by increasing Eu 2+ concentration [8]. Most of the up to date papers on this phosphor have focused their interest on the luminescence properties, the crystalline structure and modification of the lattice structure by other alkaline earth ions [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Synthesis Temperature on Manufacturing and Properties of SrSi2O2N2:Eu2+ Powders

Pawlik

Michalik

Barzowska

et al. 2017

Archives of Metallurgy and Materials

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This paper presents the results of the synthesis temperature on the properties of the ceramic powders of SrSi2O2N2:Eu2+ obtained by the solid-phase reaction. Synthesis was carried out in the temperature range of 1250-1650°C for 2 hours in nitrogen flow in the reducing atmosphere of the graphite furnace. The phases present in the resultant powders were identified by X-ray structural analysis (XRD). Scanning electron microscopy (SEM) was used to examine the changes in the powder morphology as a result of the synthesis. The excitation and emission spectra measurements let to study phosphor photoluminescence properties. The results show the strong influence of temperature synthesis on the formation and purity of expected phases. The synthesis temperature also affects the luminescent properties of SrSi2O2N2:Eu2+ ceramic powders.

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“…Therefore, these phosphors have emerged as an important family of luminescent materials and optimal candidates for light emitting diodes (LEDs). Examples include Ca‐α‐SiAlON:Eu 2+ , M 2 Si 5 N 8 :Eu 2+ (M = Ca, Sr, Ba), CaAlSiN 3 :Eu 2+ ,Ce 3+ , LaSi 3 N 5 :Ce 3+ , Sr 3 Si 2 O 4 N 2 :Eu 2+ ,Ce 3+ , and MSi 2 O 2 N 2 :Eu 2+ (M = Ca, Sr, Ba) …”

Section: Introductionmentioning

confidence: 99%

Luminescence Properties and Energy Transfer of Ce³⁺,Tb³⁺‐Coactivatedβ‐SiAlON Phosphors

et al. 2013

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Using the solid-state reaction method, Ce 3+ ,Tb 3+ -coactivated Si 5 AlON 7 (Si 6Àz Al z O z N 8Àz , z = 1) phosphors were successfully synthesized. The obtained phosphors exhibit high absorption and strong excitation bands in the wavelength range of 240-440 nm, matching well with the light emitting-diode (LED) chip. The ET from Ce 3+ to Tb 3+ ions in Si 5 AlON 7 :Ce 3+ ,Tb 3+ has been studied and demonstrated by the luminescence spectra and decay curves. Moreover, the phosphors show tunable emissions from blue to green by tuning the relative ratio of the Ce 3+ to Tb 3+ ions. Thermal quenching properties of Si 5 AlON 7 :Ce 3+ ,Tb 3+ had also been investigated and the quenching temperature is 190°C. These results show that Si 5 AlON 7 :Ce 3+ ,Tb 3+ could be a promising candidate for a single-phased color-tunable phosphor applied in UV-chip pumped LEDs.

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Photoluminescence properties of Sr1–xSi2O2N2: Eu2+x as green to yellow-emitting phosphor for blue pumped white LEDs

Cited by 19 publications

References 20 publications

Highly enhanced luminescence of SrSi₂O₂N₂:Eu²⁺ phosphors by Mg²⁺ substitution and their application in pc‐LED

Highly enhanced luminescence of SrSi₂O₂N₂:Eu²⁺ phosphors by Mg²⁺ substitution and their application in pc‐LED

The Influence of Synthesis Temperature on Manufacturing and Properties of SrSi2O2N2:Eu2+ Powders

Luminescence Properties and Energy Transfer of Ce³⁺,Tb³⁺‐Coactivatedβ‐SiAlON Phosphors

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Photoluminescence properties of Sr1–xSi2O2N2: Eu2+x as green to yellow-emitting phosphor for blue pumped white LEDs

Cited by 19 publications

References 20 publications

Highly enhanced luminescence of SrSi2O2N2:Eu2+ phosphors by Mg2+ substitution and their application in pc‐LED

Highly enhanced luminescence of SrSi2O2N2:Eu2+ phosphors by Mg2+ substitution and their application in pc‐LED

The Influence of Synthesis Temperature on Manufacturing and Properties of SrSi2O2N2:Eu2+ Powders

Luminescence Properties and Energy Transfer of Ce3+,Tb3+‐Coactivatedβ‐SiAlON Phosphors

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Highly enhanced luminescence of SrSi₂O₂N₂:Eu²⁺ phosphors by Mg²⁺ substitution and their application in pc‐LED

Highly enhanced luminescence of SrSi₂O₂N₂:Eu²⁺ phosphors by Mg²⁺ substitution and their application in pc‐LED

Luminescence Properties and Energy Transfer of Ce³⁺,Tb³⁺‐Coactivatedβ‐SiAlON Phosphors