Abstract
The researches on cyan phosphors those can be effectively excited by near-ultraviolet (NUV) light are being hot topics lately because that they have potential applications in phosphor converted white light emitting diodes (pc-WLEDs) based on the NUV chips. In this work, Bi3+/Dy3+ doped Ca2LaTaO6 phosphors were prepared through a solid state reaction procedure, and their luminescence characteristics were investigated through the measurements of the luminescence spectra and the decay curves. The excitation spectra indicate that the Bi3+ or Dy3+ single doped and Bi3+/Dy3+ codoped Ca2LaTaO6 phosphors are suitable for NUV excitation due to the excitation spectra within 250–500 nm. The emission spectra show that the lights of Bi3+/Dy3+ codoped Ca2LaTaO6 phosphors locate in cyan region. The ptotoluminescence characteristics indicate that they have possible uses in pc-WLEDs based on NUV chips.
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