A study of luminescent and structure properties of α-SiAlON: Yb2+ phosphors prepared by hydrothermal synthesis process

This contribution reports on luminescence properties of divalent ytterbium alpha-SiAlON were synthesized by hydrothermal synthesis reaction, α- SiAlON is a good host material for yellow phosphors, combines with blue LED light that it stimulates in the phosphor to generate a whitish light. The X-ray diffraction (XRD) measurement, absorption spectrum, and photoluminescence spectrum of the powder phosphors were presented. Evidence shows that phosphors sintered at 1000degC not only have higher absorb intensity in the NUV spectral region (280 nm ˜ 320 nm) and blue region (380 nm ˜ 480 nm) but also possess the higher PL intensity of evident yellow- green emission at 550 nm.