Blue emission and Raman scattering spectrum from AlN nanocrystalline powders

• Published in: Journal of crystal growth Vol. 213; no. 1; pp. 198 - 202
• Main Authors: Cao, Y.G, Chen, X.L, Lan, Y.C, Li, J.Y, Xu, Y.P, Xu, T, Liu, Q.L, Liang, J.K
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2000
• Subjects: Photoluminescence spectrum; Raman scattering spectrum; Wurtzite AlN; 78.55.−m; 42.65.Dr; Wurtzite AlN; Raman scattering spectrum; Photoluminescence spectrum; 81.05.Ea
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/S0022-0248(00)00379-1

Photoluminescence and Raman scattering spectra from AlN nanocrystalline powders are studied. A blue emission band centered at 420
nm (2.95
eV) is observed. This band may be ascribed to the transition from the shallow level of V
N to the ground state of the deep level of the V
Al
3− -3×O
N
+ defect complexes. A phonon structure resulting from the transition from the shallow level to the excited states of the deep level is also observed. The broadening of peaks and the low-wave-number-shift of the phonon frequency observed on the Raman scattering spectra are the result of nano-sized effects.