Photon releasing of Dy³⁺ doped fluoroborate glasses for laser illumination

Dy³⁺ doped fluoroborate (NCZLB) glass phosphors were designed and fabricated, and efficient photon releasing confirms the effectiveness of laser pumping. Quantitative characterization reveals that net emission powers and net emission photon numbers of 1.00 wt% Dy₂O₃ doped NCZLB glass were identified to be 618.9 μW and 17.2 × 10¹⁴cps under the excitation of 453 nm laser with 15.81 mW power, respectively, and the quantum yield was solved to be 25.9%. Potential fluorescence color trace was presupposed by change of intensity ratio between residual laser and Dy³⁺ emission, and pure white luminescence are expected when the intensity ratio reaches the appropriate range. Optimizing of size and doping concentration for the Dy³⁺-doped NCZLB glass phosphor achieves anticipated white lighting effect under blue laser excitation, and the luminous flux is up to 9.07lm. Effective white fluorescence depended on controllable photon releasing demonstrates that the Dy³⁺ doped NCZLB glasses have promising application as laser-driven white light sources for solid-state illumination.