SHEN Long-hai, ZHANG Xuan-shuo,. Photoluminescence and Synthesis of AlN Microrods[J]. Chinese Journal of Luminescence, 2016,37(8): 927-931 DOI: 10.3788/fgxb20163708.0927.
The wurtzite AlN microrods were synthesized by direct nitriding metal Al without catalyst using the direct current arc discharge method. The structure
morphology and luminescence property of the as-synthesized samples were characterized by Raman spectra
SEM and PL spectra. The length and diameter of AlN microrods are nearly 30 m and 10 m
respectively. There are two emission peaks in the PL spectrum of AlN microrods. The emission at 430 nm can be ascribed to DAP(donor-acceptor pair) radiation transition from deep donor level of V
N
to deep acceptor (V
Al
-O
N
)
2-
. The emission at 650 nm can be ascribed to the radiation transition between deep V
Al
acceptor and valence band. When the excitation wavelength changes from 270 nm to 300 nm
the intensity of the emission peak at 430 nm is strengthened and then weakened
and when the excitation wavelength is 285 nm
the intensity is maximum. The intensity of the emission peak at 650 nm increases with the increasing of the excitation wavelength.
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references
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