Abstract
Series of green CaAl2O4:Tb3+ phosphors were first prepared by the Self-Propagating Combustion Synthesis (SPCS) methods. The unit cell of CaAl2O4:Tb3+ was confirmed monoclinic system with a space group P21/n by XRD analysis. Lattice constant refinement was a = 8.6831Å,b = 8.0728 Å,c = 15.1890 Å,β = 90.1647°, Z = 12. The completely precise peaks were observed in surprise from excitation and emission spectra. Rare excitation absorption of Tb3+ coming from 4f8→4f75d1 appeared in excitation spectra at 220-320nm. Emission spectra indicated that emission peaks were attributed to 5D4→7FJ (J
= 6, 5, 4, 3, 2, 1, 0) at 500nm-700nm and 5D3→7FJ at 380nm-500nm. Vibration feature of products were investigated by FT-IR spectra. SEM revealed products had smooth surface, the better crystallization..
Keywords
SPCS, CaAl2O4:Tb3+, Pure products, Luminescence properties.
Citation
CHANG-BAO FU, HONG-JUN DONG, CHENG-YOU LIU, YAN-PING WANG, Synthesis, structure and luminescence properties of phosphor CaAl2O4 activated by Tb3+, Optoelectronics and Advanced Materials - Rapid Communications, 4, 1, January 2010, pp.73-76 (2010).
Submitted at: Dec. 2, 2009
Accepted at: Jan. 19, 2010