Abstract：Some kinds of phosphors were synthesized with Eu/Dy coating ZnO nanocrystals by co-precipitation approach derived from Zn(AC)2·2H2O, NaOH as precursors. The crystal structure and size were characterized by the X-ray diffraction. Photoluminescence(PL) measurements show an intense red luminescence at 612 nm caused by transition of Eu3+ ions in ZnO∶Eu3+ and intense luminescence band at 484 and 575 nm caused by transition of Dy3+ ions in ZnO∶Dy3+. The results show that the energy transfer was realized from the host to the rare earth ions. The mechanism of the energy transfer was discussed. Meanwhile Eu/Dy co-coating nano ZnO can be achieved white light emission by energy transfer.
Key words：ZnO;Rare-earths;Photoluminescence;Energy transfer
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