We report on the ultraviolet photoluminescence (UV-PL) and Raman properties of wurtzite nanopowders of average size that were synthesized via the thermal decomposition method. For the studied composition range of , the room-temperature UV-PL was found to be tuned by towards the UV spectral range, and the PL emission was established to be due to an excitonic-type recombination mechanism. The first-order longitudinal optical (LO) Raman mode was found to exhibit a blueshift of and the second-order LO a shift of . The LO mode of the nanopowders is discussed in terms of a mixed symmetry phonon known as a quasi-LO mode. The observed blueshift indicates that the is the principal symmetry component in the Raman scattering of the nanopowders.
Ultraviolet photoluminescence and Raman properties of MgZnO nanopowders
Leah Bergman, John L. Morrison, Xiang-Bai Chen, Jesse Huso, Heather Hoeck; Ultraviolet photoluminescence and Raman properties of MgZnO nanopowders. Appl. Phys. Lett. 9 January 2006; 88 (2): 023103. https://doi.org/10.1063/1.2163991
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