Effect of sintering temperature of Ce3+-doped Lu3Al5O12 phosphors on light emission and properties of crystal structure for white-light-emitting diodes

Hiroshi Koizumi, Junya Watabe, Shin Sugiyama, Hideaki Hirabayashi, Tetsuya Homma

研究成果: Article

抄録

The effect of the sintering temperature of Ce3+-doped Lu3Al5O12 (Ce-LuAG) phosphors on the emission and properties of the crystal structure was studied. A cathodoluminescence peak at 317 nm, which was assigned to lattice defects, was exhibited in addition to emission peaks at 508 and 540 nm for the Ce-LuAG phosphors. The intensities of the 317 nm emission peak for the phosphors with mean particle diameters of 5.0 and 10.0 µm formed at a low sintering temperature of 1430 °C were higher than those for the phosphors with mean particle diameters of 18.0 and 20.5 µm formed at a high sintering temperature of 1550 °C. In contrast, the electroluminescence spectra for fabricated white-light-emitting diodes (LEDs) using the phosphors revealed that the intensity of the peak at 540 nm was strong for the mean particle diameters of 18.0 and 20.5 µm. The intensity of the 540 nm peak, which is attributed to the 4f→5d transition of the Ce3+ activator, showed a dependence on the sintering temperature. The relationship between the optical properties and the lattice defects is discussed.

元の言語English
ページ(範囲)340-348
ページ数9
ジャーナルOptical Review
25
発行部数3
DOI
出版物ステータスPublished - 2018 6 1

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phosphors
light emission
sintering
light emitting diodes
crystal structure
temperature
defects
cathodoluminescence
electroluminescence
optical properties

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

これを引用

Effect of sintering temperature of Ce3+-doped Lu3Al5O12 phosphors on light emission and properties of crystal structure for white-light-emitting diodes. / Koizumi, Hiroshi; Watabe, Junya; Sugiyama, Shin; Hirabayashi, Hideaki; Homma, Tetsuya.

:: Optical Review, 巻 25, 番号 3, 01.06.2018, p. 340-348.

研究成果: Article

Koizumi, Hiroshi ; Watabe, Junya ; Sugiyama, Shin ; Hirabayashi, Hideaki ; Homma, Tetsuya. / Effect of sintering temperature of Ce3+-doped Lu3Al5O12 phosphors on light emission and properties of crystal structure for white-light-emitting diodes. :: Optical Review. 2018 ; 巻 25, 番号 3. pp. 340-348.
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abstract = "The effect of the sintering temperature of Ce3+-doped Lu3Al5O12 (Ce-LuAG) phosphors on the emission and properties of the crystal structure was studied. A cathodoluminescence peak at 317 nm, which was assigned to lattice defects, was exhibited in addition to emission peaks at 508 and 540 nm for the Ce-LuAG phosphors. The intensities of the 317 nm emission peak for the phosphors with mean particle diameters of 5.0 and 10.0 µm formed at a low sintering temperature of 1430 °C were higher than those for the phosphors with mean particle diameters of 18.0 and 20.5 µm formed at a high sintering temperature of 1550 °C. In contrast, the electroluminescence spectra for fabricated white-light-emitting diodes (LEDs) using the phosphors revealed that the intensity of the peak at 540 nm was strong for the mean particle diameters of 18.0 and 20.5 µm. The intensity of the 540 nm peak, which is attributed to the 4f→5d transition of the Ce3+ activator, showed a dependence on the sintering temperature. The relationship between the optical properties and the lattice defects is discussed.",
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AU - Watabe, Junya

AU - Sugiyama, Shin

AU - Hirabayashi, Hideaki

AU - Homma, Tetsuya

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KW - Solid-phase synthesis

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