Ts. Ahmadi et al., Low-temperature synthesis of pure and Mn-doped willemite phosphor (Zn2SiO4: Mn) in aqueous medium, MATER RES B, 35(11), 2000, pp. 1869-1879
Mn-doped willemite (Zn2SiO4:Mn), which is a zinc silicate green phosphor, i
s synthesized in an aqueous medium at as low temperature as 250 degreesC. Z
n2SiO4:Mn samples showed acicular and spherical shaped particles ranging in
size from similar to 50 to 2400 nm: The microstructures of the nanocrystal
line products were characterized by XRD, TEM, SEM, and light scattering. Th
e results indicated the formation of solid crystalline structures. The opti
cal emission of 1% and 3% Mn-doped Zn2SiO4 was measured by fluorescence spe
ctroscopy, which give further evidence for the incorporation of Mn within t
he lattice. This procedure provides an easy and contamination-free method f
or synthesis of willemite, which commonly is prepared at very high temperat
ures. (C) 2000 Elsevier Science Ltd. All rights reserved.