WANG Xiao-Li, YANG Zhi, HE Feng etc. Green Chemical Synthesis and Luminescence Properties of LaAlO<sub>3</sub>:Eu<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2014,35(2): 172-177
WANG Xiao-Li, YANG Zhi, HE Feng etc. Green Chemical Synthesis and Luminescence Properties of LaAlO<sub>3</sub>:Eu<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2014,35(2): 172-177 DOI: 10.3788/fgxb20143502.0172.
Green Chemical Synthesis and Luminescence Properties of LaAlO3:Eu3+
low cost method was employed to synthesize perovskite-type LaAlO
3
powders. The stoichiometric mixtures of La(OH)
3
/La
2
O
3
and Al(OH)
3
were activated by a hydrothermal treatment in teflon-lined stainless steel autoclave at 220℃ for 3 d
and then the precursors were quickly heated to 900℃ and reacted for 5 h to obtain LaAlO
3
. The obtained samples were characterized by X-ray diffraction (XRD) and photoluminescence (PL) spectra. XRD result shows that LaAlO
3
crystal structure belongs to the rhombohedral system with the space group of
R
3
c
(No.167). PL results indicate the main emissions of LaAlO
3
:Eu
3+
come from the magnetic dipole-dipole
5
D
0
7
F
1
transition and the electric dipole-dipole
5
D
0
7
F
2
transition. The ratio value of the intensity of Eu
3+
:
5
D
0
7
F
2
transition to the intensity of Eu
3+
:
5
D
0
7
F
1
transition increases with the increase of Eu
3+
concentration. Host absorption of LaAlO
3
:Eu
3+
in the VUV range is weaker than that of O
2-
-Eu
3+
charge transfer band in the UV range.
关键词
Keywords
references
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