Ce: (Y1-xLux )3Al5O12 single-crystal phosphor plates for high-brightness white LEDs/LDs with high-color rendering (Ra > 90) and temperature stability

Stelian Arjoca, Encarnación G. Víllora, Daisuke Inomata, Kazuo Aoki, Yoshiyuki Sugahara, Kiyoshi Shimamura

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    Ce:(Y1-xLux)3Al5O12 single-crystals are investigated in detail as phosphors for high-brightness LEDs and LDs. It is demonstrated that single-crystal phosphor plates (SCPPs) present very advantageous characteristics in comparison with standard powder phosphors. On the one side, the very high quantum efficiency of the SCPPs does not decrease with the temperature increase, and on the other side, the SCPPs possess a high thermal conductivity, so that these can be efficiently cooled to avoid device overheating. The optical properties of these SCPPs are investigated from room temperature to 300 °C. Ce:Y3Al5O12 SCPPs are adequate for high-brightness cool white light sources. Instead, Ce:(Y1-xLux)3 Al5O12 SCPPs, whose emission shifts to the green with the Lu concentration, are very promising for neutral and warm white light sources in conjunction with a red-phosphor. It is shown that these white sources exhibit a color rendering over 90 for a wide range of excitation and SCPP emission wavelengths.

    Original languageEnglish
    Article number025041
    JournalMaterials Research Express
    Volume1
    Issue number2
    DOIs
    Publication statusPublished - 2014 Jun 1

    Fingerprint

    Phosphors
    Light emitting diodes
    Luminance
    Single crystals
    Color
    Temperature
    Light sources
    Quantum efficiency
    Powders
    Thermal conductivity
    Optical properties
    Wavelength

    Keywords

    • Ce-doped garnets
    • Phosphor
    • Single-crystal phosphors
    • White light sources LEDs/LDs

    ASJC Scopus subject areas

    • Biomaterials
    • Electronic, Optical and Magnetic Materials
    • Metals and Alloys
    • Polymers and Plastics
    • Surfaces, Coatings and Films

    Cite this

    Ce : (Y1-xLux )3Al5O12 single-crystal phosphor plates for high-brightness white LEDs/LDs with high-color rendering (Ra > 90) and temperature stability. / Arjoca, Stelian; Víllora, Encarnación G.; Inomata, Daisuke; Aoki, Kazuo; Sugahara, Yoshiyuki; Shimamura, Kiyoshi.

    In: Materials Research Express, Vol. 1, No. 2, 025041, 01.06.2014.

    Research output: Contribution to journalArticle

    @article{f729395fe3be483e815fa98c8cc251c4,
    title = "Ce: (Y1-xLux )3Al5O12 single-crystal phosphor plates for high-brightness white LEDs/LDs with high-color rendering (Ra > 90) and temperature stability",
    abstract = "Ce:(Y1-xLux)3Al5O12 single-crystals are investigated in detail as phosphors for high-brightness LEDs and LDs. It is demonstrated that single-crystal phosphor plates (SCPPs) present very advantageous characteristics in comparison with standard powder phosphors. On the one side, the very high quantum efficiency of the SCPPs does not decrease with the temperature increase, and on the other side, the SCPPs possess a high thermal conductivity, so that these can be efficiently cooled to avoid device overheating. The optical properties of these SCPPs are investigated from room temperature to 300 °C. Ce:Y3Al5O12 SCPPs are adequate for high-brightness cool white light sources. Instead, Ce:(Y1-xLux)3 Al5O12 SCPPs, whose emission shifts to the green with the Lu concentration, are very promising for neutral and warm white light sources in conjunction with a red-phosphor. It is shown that these white sources exhibit a color rendering over 90 for a wide range of excitation and SCPP emission wavelengths.",
    keywords = "Ce-doped garnets, Phosphor, Single-crystal phosphors, White light sources LEDs/LDs",
    author = "Stelian Arjoca and V{\'i}llora, {Encarnaci{\'o}n G.} and Daisuke Inomata and Kazuo Aoki and Yoshiyuki Sugahara and Kiyoshi Shimamura",
    year = "2014",
    month = "6",
    day = "1",
    doi = "10.1088/2053-1591/1/2/025041",
    language = "English",
    volume = "1",
    journal = "Materials Research Express",
    issn = "2053-1591",
    publisher = "IOP Publishing Ltd.",
    number = "2",

    }

    TY - JOUR

    T1 - Ce

    T2 - (Y1-xLux )3Al5O12 single-crystal phosphor plates for high-brightness white LEDs/LDs with high-color rendering (Ra > 90) and temperature stability

    AU - Arjoca, Stelian

    AU - Víllora, Encarnación G.

    AU - Inomata, Daisuke

    AU - Aoki, Kazuo

    AU - Sugahara, Yoshiyuki

    AU - Shimamura, Kiyoshi

    PY - 2014/6/1

    Y1 - 2014/6/1

    N2 - Ce:(Y1-xLux)3Al5O12 single-crystals are investigated in detail as phosphors for high-brightness LEDs and LDs. It is demonstrated that single-crystal phosphor plates (SCPPs) present very advantageous characteristics in comparison with standard powder phosphors. On the one side, the very high quantum efficiency of the SCPPs does not decrease with the temperature increase, and on the other side, the SCPPs possess a high thermal conductivity, so that these can be efficiently cooled to avoid device overheating. The optical properties of these SCPPs are investigated from room temperature to 300 °C. Ce:Y3Al5O12 SCPPs are adequate for high-brightness cool white light sources. Instead, Ce:(Y1-xLux)3 Al5O12 SCPPs, whose emission shifts to the green with the Lu concentration, are very promising for neutral and warm white light sources in conjunction with a red-phosphor. It is shown that these white sources exhibit a color rendering over 90 for a wide range of excitation and SCPP emission wavelengths.

    AB - Ce:(Y1-xLux)3Al5O12 single-crystals are investigated in detail as phosphors for high-brightness LEDs and LDs. It is demonstrated that single-crystal phosphor plates (SCPPs) present very advantageous characteristics in comparison with standard powder phosphors. On the one side, the very high quantum efficiency of the SCPPs does not decrease with the temperature increase, and on the other side, the SCPPs possess a high thermal conductivity, so that these can be efficiently cooled to avoid device overheating. The optical properties of these SCPPs are investigated from room temperature to 300 °C. Ce:Y3Al5O12 SCPPs are adequate for high-brightness cool white light sources. Instead, Ce:(Y1-xLux)3 Al5O12 SCPPs, whose emission shifts to the green with the Lu concentration, are very promising for neutral and warm white light sources in conjunction with a red-phosphor. It is shown that these white sources exhibit a color rendering over 90 for a wide range of excitation and SCPP emission wavelengths.

    KW - Ce-doped garnets

    KW - Phosphor

    KW - Single-crystal phosphors

    KW - White light sources LEDs/LDs

    UR - http://www.scopus.com/inward/record.url?scp=84948814765&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84948814765&partnerID=8YFLogxK

    U2 - 10.1088/2053-1591/1/2/025041

    DO - 10.1088/2053-1591/1/2/025041

    M3 - Article

    AN - SCOPUS:84948814765

    VL - 1

    JO - Materials Research Express

    JF - Materials Research Express

    SN - 2053-1591

    IS - 2

    M1 - 025041

    ER -