Synthesis and characterization of the intense red phosphor AgEu(MoO 4)2 for blue GaN-based LED chips

Chongfeng Guo*, Tao Chen, Lin Luan, Hyun Kyoung Yang, Byung Chun Choi, Jung Hyun Jeong

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)


    The intense red-emitting phosphor AgEu(MoO4)2 was prepared by using a sol-gel method. The crystallization process of the precursors was characterized by using a thermogravimetry-differential thermal analysis (TG-DTA) and X-ray diffraction (XRD). The size distribution and the shape of the phosphors were characterized by using a field emission scanning electron microscopy (FE-SEM). The samples obtained by using the sol-gel method had a smaller size, a more regular shape and a narrower particle size distribution than those obtained by using the solid-state method. The photoluminescent excitation spectrum of the AgEu(MoO4)2 phosphor is different from there of other double molybdates AEu(MoO 4)2 (A = alkali metal ions) phosphors and its strongest absorption is located at 465-nm. The phosphor AgEu(MoO4)2 shows a strong red emission at 616 nm under excitation of 465 nm blue light, which matches well with commercial blue-light-emitting diodes (LEDs); thus, it is an excellent red phosphor candidate for white LEDs with blue light chips.

    Original languageEnglish
    Pages (from-to)720-724
    Number of pages5
    JournalJournal of the Korean Physical Society
    Issue number2
    Publication statusPublished - Feb 2009


    • AgEu(MoO)
    • Light-emitting diodes
    • Red phosphors
    • Sol-gel


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