Citation
Fernández-Garrido, Sergio and Pereiro Viterbo, Juan and González-Posada Flores, Fernando and Muñoz Merino, Elias and Calleja Pardo, Enrique and Redondo-Cubero, Andrés and Gago, R.
(2008).
Photoluminiscence enhancement in quaternay III-nitrides alloys grown by molecular beam epitaxy with increasing Al content.
"Journal of Applied Physics", v. 103
(n. 4);
pp..
ISSN 0021-8979.
https://doi.org/10.1063/1.2874451.
Abstract
Room temperature photoluminescence and optical absorption spectra have been measured in wurtzite InxAlyGa1−x−yN (x ∼ 0.06, 0.02<y<0.27) layers grown by molecular beam epitaxy. Photoluminescence spectra show both an enhancement of the integrated intensity and an increasing Stokes shift with the Al content. Both effects arise from an Al-enhanced exciton localization revealed by the S- and W-shaped temperature dependences of the photoluminescence emission energy and bandwidth, respectively. Present results point to these materials as a promising choice for the active region in efficient light emitters. An In-related bowing parameter of 1.6 eV was derived from optical absorption data.
