以溶膠凝膠法製備Ba2SiO4:Eu3+及Ba2SiO4:Eu2+螢光粉及其發光性質之研究

Abstract

The research is attempted to synthesize Ba2SiO4:Re(Re=Eu3+、Eu2+) phosphor by using one step fired sol-gel method. Study several controlling factors that could affect the phosphor’s luminescence characteristics, such as firing temperature, firing time, doped with different amounts of the activator.Eu3+ activated Ba2SiO4 phosphors were synthesized at 1150℃~1250℃ for 4 hours~6hours by sol-gel process in a air ambient, doping Eu3+ 1 mole%~3 mole% has the best luminous intensity. The excitation spectrum monitored at 610 nm, obtained the strongest excitation peak at 395 nm, and the emission spectrum excited by 395 nm, showed red light wavelength range that were 578 nm、587 nm、589 nm、594 nm、610 nm、618 nm、651 nm、654 nm、686 nm、701 nm, they were correspond to 5D0→7F0、5D0→7F1、5D0→7F2、5D0→7F3、5D0→7F4 transitions, respectively.Eu2+ activated Ba2SiO4 phosphors were synthesized at 1150℃~1250℃ for 4 hours~6hours by sol-gel process in a reductive atmosphere, doping Eu2+ 1 mole%~3 mole% has the best luminous intensity. The excitation spectrum monitored at 505 nm, obtained the strongest excitation peak at 360 nm, and the emission spectrum excited by 360 nm the emission spectrum excited by 505 nm, showed blue-green emission peak at 505 nm that due to 4f7(8S7/2)→4f6(7Fj)5d1 transition.