Melilite-structure CaYAl3O7:Eu3+ phosphor: Structural and optical characteristics for near-UV LED-based white light

Seung Hyok Park; Kyoung Hwa Lee; Sanjith Unithrattil; Ho Shin Yoon; Ho Gyeom Jang; Won Bin Im

doi:10.1021/jp307192y

Melilite-structure CaYAl₃O₇:Eu³⁺ phosphor: Structural and optical characteristics for near-UV LED-based white light

Seung Hyok Park, Kyoung Hwa Lee, Sanjith Unithrattil, Ho Shin Yoon, Ho Gyeom Jang, Won Bin Im

College of Science

Research output: Contribution to journal › Article › peer-review

121 Citations (Scopus)

Abstract

A red-emitting phosphor, CaY_1-xEu_xAl ₃O₇ (CYA:Eu³⁺), was prepared by conventional solid-state reaction, and its structural properties were investigated by means of Rietveld refinement method and maximum entropy method using an X-ray source. XRD patterns confirm the tetragonal phase of CYA:Eu³⁺ phosphors. The photoluminescence properties of the samples were investigated for application to white light-emitting diodes (WLEDs). The emission spectrum is dominated by a red peak located at 616 nm due to the ⁵D₀ → ⁷F₂ electric dipole transition of Eu³⁺ ions. Concentration quenching occurs when the Eu³⁺ concentration is about 0.35 and the critical transfer distance of the phosphor is also calculated. A white LED fabricated with blue, green, and CYA:Eu³⁺ red phosphor incorporated with an encapsulant in ultraviolet LEDs (λ_max = 396 nm) is discussed.

Original language	English
Pages (from-to)	26850-26856
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	51
DOIs	https://doi.org/10.1021/jp307192y
Publication status	Published - 2012 Dec 27

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Melilite-structure CaYAl3O7:Eu3+ phosphor: Structural and optical characteristics for near-UV LED-based white light",

abstract = "A red-emitting phosphor, CaY1-xEuxAl 3O7 (CYA:Eu3+), was prepared by conventional solid-state reaction, and its structural properties were investigated by means of Rietveld refinement method and maximum entropy method using an X-ray source. XRD patterns confirm the tetragonal phase of CYA:Eu3+ phosphors. The photoluminescence properties of the samples were investigated for application to white light-emitting diodes (WLEDs). The emission spectrum is dominated by a red peak located at 616 nm due to the 5D0 → 7F2 electric dipole transition of Eu3+ ions. Concentration quenching occurs when the Eu3+ concentration is about 0.35 and the critical transfer distance of the phosphor is also calculated. A white LED fabricated with blue, green, and CYA:Eu3+ red phosphor incorporated with an encapsulant in ultraviolet LEDs (λmax = 396 nm) is discussed.",

author = "Park, {Seung Hyok} and Lee, {Kyoung Hwa} and Sanjith Unithrattil and Yoon, {Ho Shin} and Jang, {Ho Gyeom} and Im, {Won Bin}",

year = "2012",

month = dec,

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doi = "10.1021/jp307192y",

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T1 - Melilite-structure CaYAl3O7:Eu3+ phosphor

T2 - Structural and optical characteristics for near-UV LED-based white light

AU - Park, Seung Hyok

AU - Lee, Kyoung Hwa

AU - Unithrattil, Sanjith

AU - Yoon, Ho Shin

AU - Jang, Ho Gyeom

AU - Im, Won Bin

PY - 2012/12/27

Y1 - 2012/12/27

N2 - A red-emitting phosphor, CaY1-xEuxAl 3O7 (CYA:Eu3+), was prepared by conventional solid-state reaction, and its structural properties were investigated by means of Rietveld refinement method and maximum entropy method using an X-ray source. XRD patterns confirm the tetragonal phase of CYA:Eu3+ phosphors. The photoluminescence properties of the samples were investigated for application to white light-emitting diodes (WLEDs). The emission spectrum is dominated by a red peak located at 616 nm due to the 5D0 → 7F2 electric dipole transition of Eu3+ ions. Concentration quenching occurs when the Eu3+ concentration is about 0.35 and the critical transfer distance of the phosphor is also calculated. A white LED fabricated with blue, green, and CYA:Eu3+ red phosphor incorporated with an encapsulant in ultraviolet LEDs (λmax = 396 nm) is discussed.

AB - A red-emitting phosphor, CaY1-xEuxAl 3O7 (CYA:Eu3+), was prepared by conventional solid-state reaction, and its structural properties were investigated by means of Rietveld refinement method and maximum entropy method using an X-ray source. XRD patterns confirm the tetragonal phase of CYA:Eu3+ phosphors. The photoluminescence properties of the samples were investigated for application to white light-emitting diodes (WLEDs). The emission spectrum is dominated by a red peak located at 616 nm due to the 5D0 → 7F2 electric dipole transition of Eu3+ ions. Concentration quenching occurs when the Eu3+ concentration is about 0.35 and the critical transfer distance of the phosphor is also calculated. A white LED fabricated with blue, green, and CYA:Eu3+ red phosphor incorporated with an encapsulant in ultraviolet LEDs (λmax = 396 nm) is discussed.

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Melilite-structure CaYAl₃O₇:Eu³⁺ phosphor: Structural and optical characteristics for near-UV LED-based white light

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