TY - JOUR
T1 - Luminescence of a new class of UV-blue-emitting phosphors MSi2O2-deltaN2+2/3delta:Ce3+ (M = Ca, Sr, Ba)
AU - Li, Y.Q.
AU - With, de, G.
AU - Hintzen, H.T.J.M.
PY - 2005
Y1 - 2005
N2 - The luminescence properties of Ce3+,Na+-codoped MSi2O22dN2+2/3d (M 5 Ca, Sr, Ba) are reported. The undoped and Ce3+,Na+-codoped MSi2O22dN2+2/3d powders were prepared by a solid-state reaction at temperatures between 1300–1400 uC under N2–H2 (10%) atmosphere in the system MO–SiO2–Si3N4 (M 5 Ca, Sr, Ba). MSi2O22dN2+2/3d (M 5 Ca, Sr, Ba) crystallizes in the monoclinic system with different crystal structures. For excitation in the 300–360 nm range, MSi2O22dN2+2/3d:Ce3+ shows typical broad emission bands peaking at about 392, 473 and 396 nm forM5 Ca, Sr and Ba, respectively. In particular, CaSi2O22dN2+2/3d:Ce3+ shows an unusual shortwavelength emission (y392 nm) with a very small Stokes shift of 2200 cm21; BaSi2O2N2:Ce3+ shows an interesting white-light emission in the visible range 350–600 nm for excitation at 365 nm.
AB - The luminescence properties of Ce3+,Na+-codoped MSi2O22dN2+2/3d (M 5 Ca, Sr, Ba) are reported. The undoped and Ce3+,Na+-codoped MSi2O22dN2+2/3d powders were prepared by a solid-state reaction at temperatures between 1300–1400 uC under N2–H2 (10%) atmosphere in the system MO–SiO2–Si3N4 (M 5 Ca, Sr, Ba). MSi2O22dN2+2/3d (M 5 Ca, Sr, Ba) crystallizes in the monoclinic system with different crystal structures. For excitation in the 300–360 nm range, MSi2O22dN2+2/3d:Ce3+ shows typical broad emission bands peaking at about 392, 473 and 396 nm forM5 Ca, Sr and Ba, respectively. In particular, CaSi2O22dN2+2/3d:Ce3+ shows an unusual shortwavelength emission (y392 nm) with a very small Stokes shift of 2200 cm21; BaSi2O2N2:Ce3+ shows an interesting white-light emission in the visible range 350–600 nm for excitation at 365 nm.
U2 - 10.1039/b507735d
DO - 10.1039/b507735d
M3 - Article
SN - 0959-9428
VL - 15
SP - 4492
EP - 4496
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 42
ER -