Open AccessPreparation and Properties of Cr3+ Doped Mg0.388Al2.408O4 Red Phosphor
Author(s) -
Xinyan Yao,
Min Cai,
Shi-Qing Man
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/782/2/022020
Subject(s) - phosphor , analytical chemistry (journal) , excited state , doping , emission spectrum , materials science , fluorescence , excitation , absorption spectroscopy , spectral line , nuclear chemistry , chemistry , atomic physics , optics , physics , optoelectronics , chromatography , astronomy , quantum mechanics
The Cr 3+ activated Mg 0.388 Al 2.408 O 4 phosphor was synthesized by sol-gel and high temperature solid phase method in the air at 1400°C for 6h. The phosphors structure was measured by X-ray diffraction (XRD); excitation spectra, emission spectra and decay lifetime were obtained by fluorescence spectrophotometer equipped. It showed that the sample has two strong broad absorption ranging from 390nm to 420nm and 530nm to 590nm, and the peak positions are around 407nm and 552nm; the maximum of the red emission which is due to the transition from the 2 E g ( 2 G) excited state to the 4 A 2g ground state is at 688 nm. And the lifetime of Cr 3+ in the Mg 0.388 Al 2.408 O 4 host is 4.8255ms.