Synthesis of high intensity green emitting (Ba,Sr)SiO4:Eu2+ phosphors through cellulose assisted liquid phase precursor process

Usama Bin Humayoun, Young Hyun Song, Minji Lee, Kakihana Masato, Hiroshi Abe, Kenji Toda, Yasushi Sato, Takaki Masaki, Dae Ho Yoon

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Green emitting phosphor (Ba1-x,Sr1-x)SiO4:2xEu2+, x = 0.03, 0.05, 0.1, and 0.15 were synthesized through a Liquid Phase Precursor Process (LPP). Liquid phase precursor method is reported to result in phosphors with markedly increased emission intensities compared to other synthesis methods. Here microcrystalline cellulose (MCC) and hydroxypropyl cellulose (HPC) templates were studied to achieve high efficiency green phosphors. The phase formation was investigated by XRD analysis which showed the conformation of the Ba2SiO4 (JCPDS card number 761631) phase. The obtained samples exhibited broad excitation spectra with maximum at 430 nm and a green emission centered around 520 nm. An optimized dopant concentration was selected and the effect of two different types of cellulose, i.e. MCC and HPC templates on the emission properties was considered. It was found that the samples synthesized using HPC and fired at 1050 °C under a reducing atmosphere, showed a high intensity of almost 2 times that of the MCC sample. Further experiments were conducted by varying viscosity, particle weight, and molecular weight of the HPC template. It was found that the green emission from the (Ba,Sr)SiO4:Eu2+ increased with the increase in viscosity and molecular weight of the template.

    Original languageEnglish
    Pages (from-to)110-114
    Number of pages5
    JournalOptical Materials
    Volume51
    DOIs
    Publication statusPublished - 2016 Jan 1

    Keywords

    • HPC
    • LED
    • LPP
    • MCC

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Computer Science(all)
    • Atomic and Molecular Physics, and Optics
    • Spectroscopy
    • Physical and Theoretical Chemistry
    • Organic Chemistry
    • Inorganic Chemistry
    • Electrical and Electronic Engineering

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