Sr_4Al_(14)O_(25):Eu~(2+) Nanophosphor Synthesized with Salted Sol-Gel Method

摘要

Nanophosphors of Sr_4Al_(14)O_(25):Eu~(2+) were synthesized with a salted sol-gel method. X-ray diffraction spectrum showed that Sr_4Al_(14)O_(25) was obtained after it was sintered at 900 deg C for 2 h. Sr4Ali4025:Eu2+ nanophosphor was a nestlike nanofiber with an average diameter of 10-20 nm under a scanning electron microscope. Emission peaks of Eu~(2+) 4f~7-4f~65d~1 transitions were found at 487 and 408 nm corresponding to two Eu2+ sites in Sr_4Al_(14)O_(25). Energy transfer between Eu~(2+) in two different sites was reduced to one-half the number that were made by solid-state reaction.