One-step preparation of blue-emitting (La,Ca)Si3(O,N) 5:Ce3+ phosphors for high-color rendering white light-emitting diodes

Atsuro Yaguchi; Takayuki Suehiro; Tsugio Sato; Naoto Hirosaki

doi:10.1143/APEX.4.022101

One-step preparation of blue-emitting (La,Ca)Si₃(O,N) ₅:Ce³⁺ phosphors for high-color rendering white light-emitting diodes

Atsuro Yaguchi, Takayuki Suehiro, Tsugio Sato, Naoto Hirosaki

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

9 Citations (Scopus)

Abstract

Highly phase-pure (La,Ca)Si₃(O,N)₅:Ce³⁺ blue-emitting phosphors were successfully synthesized via the one-step solid-state reaction from the system La₂O₃-CaO-CeO ₂-Si₃N₄. The synthesized (La,Ca)Si ₃(O,N)₅:Ce³⁺ exhibits tunable blue broadband emission with the dominant wavelength of 466-479nm and the external quantum efficiency up to ∼45% under 380nm near-UV (NUV) excitation. Spectral simulations of the trichromatic white light-emitting diodes (LEDs) using (La,Ca)Si₃(O,N)₅:Ce³⁺ demonstrated markedly higher color rendering index Ra values of 93-95, compared to 76-90 attained by the systems using a conventional BAM:Eu²⁺ phosphor or InGaN blue LED. The present achievement indicates the promising applicability of (La,Ca)Si ₃(O,N)₅:Ce³⁺ as a blue luminescent source for NUV-converting high-color rendering white LEDs.

Original language	English
Article number	022101
Journal	Applied Physics Express
Volume	4
Issue number	2
DOIs	https://doi.org/10.1143/APEX.4.022101
Publication status	Published - 2011 Feb 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "One-step preparation of blue-emitting (La,Ca)Si3(O,N) 5:Ce3+ phosphors for high-color rendering white light-emitting diodes",

abstract = "Highly phase-pure (La,Ca)Si3(O,N)5:Ce3+ blue-emitting phosphors were successfully synthesized via the one-step solid-state reaction from the system La2O3-CaO-CeO 2-Si3N4. The synthesized (La,Ca)Si 3(O,N)5:Ce3+ exhibits tunable blue broadband emission with the dominant wavelength of 466-479nm and the external quantum efficiency up to ∼45% under 380nm near-UV (NUV) excitation. Spectral simulations of the trichromatic white light-emitting diodes (LEDs) using (La,Ca)Si3(O,N)5:Ce3+ demonstrated markedly higher color rendering index Ra values of 93-95, compared to 76-90 attained by the systems using a conventional BAM:Eu2+ phosphor or InGaN blue LED. The present achievement indicates the promising applicability of (La,Ca)Si 3(O,N)5:Ce3+ as a blue luminescent source for NUV-converting high-color rendering white LEDs.",

author = "Atsuro Yaguchi and Takayuki Suehiro and Tsugio Sato and Naoto Hirosaki",

year = "2011",

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doi = "10.1143/APEX.4.022101",

language = "English",

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T1 - One-step preparation of blue-emitting (La,Ca)Si3(O,N) 5:Ce3+ phosphors for high-color rendering white light-emitting diodes

AU - Yaguchi, Atsuro

AU - Suehiro, Takayuki

AU - Sato, Tsugio

AU - Hirosaki, Naoto

PY - 2011/2/1

Y1 - 2011/2/1

N2 - Highly phase-pure (La,Ca)Si3(O,N)5:Ce3+ blue-emitting phosphors were successfully synthesized via the one-step solid-state reaction from the system La2O3-CaO-CeO 2-Si3N4. The synthesized (La,Ca)Si 3(O,N)5:Ce3+ exhibits tunable blue broadband emission with the dominant wavelength of 466-479nm and the external quantum efficiency up to ∼45% under 380nm near-UV (NUV) excitation. Spectral simulations of the trichromatic white light-emitting diodes (LEDs) using (La,Ca)Si3(O,N)5:Ce3+ demonstrated markedly higher color rendering index Ra values of 93-95, compared to 76-90 attained by the systems using a conventional BAM:Eu2+ phosphor or InGaN blue LED. The present achievement indicates the promising applicability of (La,Ca)Si 3(O,N)5:Ce3+ as a blue luminescent source for NUV-converting high-color rendering white LEDs.

AB - Highly phase-pure (La,Ca)Si3(O,N)5:Ce3+ blue-emitting phosphors were successfully synthesized via the one-step solid-state reaction from the system La2O3-CaO-CeO 2-Si3N4. The synthesized (La,Ca)Si 3(O,N)5:Ce3+ exhibits tunable blue broadband emission with the dominant wavelength of 466-479nm and the external quantum efficiency up to ∼45% under 380nm near-UV (NUV) excitation. Spectral simulations of the trichromatic white light-emitting diodes (LEDs) using (La,Ca)Si3(O,N)5:Ce3+ demonstrated markedly higher color rendering index Ra values of 93-95, compared to 76-90 attained by the systems using a conventional BAM:Eu2+ phosphor or InGaN blue LED. The present achievement indicates the promising applicability of (La,Ca)Si 3(O,N)5:Ce3+ as a blue luminescent source for NUV-converting high-color rendering white LEDs.

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One-step preparation of blue-emitting (La,Ca)Si₃(O,N) ₅:Ce³⁺ phosphors for high-color rendering white light-emitting diodes

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