科研之友
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摘要
Eu3+ doped transparent glass ceramics (GCs) are obtained via melt-quenching technique and subsequent heating. The structure and morphology of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD and SEM results showed that tetragonal barium molybdate (BaMoO4) crystals are precipitated in the glass matrix. The excitation spectrum of BaMoO4:Eu3+ GCs are composed of Eu3+ ions characteristic excitation peaks. The emission spectra of BaMoO4:Eu3+ GCs consists of several sharp emission bands center at 592 nm, 615 nm, 653 nm and 702 nm, respectively. Among them, the strongest one was located at 615 nm due to D-5(0) -> F-7(2) transition of Eu3+ generating bright red light. The quantum efficiency of BaMoO4:Eu3+ GC is 46.3%, and the fluorescence lifetime is 2.0716 ms, when the Eu3+ ions doping concentration is 0.7 mol%.The results show that Eu3+ doped BaMoO4 glass ceramics exhibit a potential to act as a kind of red phosphor for white light-emitting diodes (W-LEDs).
