Getting to the core of the problem: origin of the luminescence from (Mg,Zn)O heterostructured nanowires.

Rosenberg, Richard A; Shenoy, Gopal K; Chisholm, Matthew F; Tien, Li-Chia; Norton, David; Pearton, Steven · Nano Lett · 2007

basic_science · Level V

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Abstract

We have measured the time-resolved, X-ray excited optical luminescence spectra from two types of MgxZn(1-x)O core-shell, heterostructured nanowires: type I, with a small x, wurtzite core, encased in a larger x, wurtzite sheath; and type II, with a wurtzite core (x approximately 0), encased in a rock-salt sheath (x>0.62). By monitoring the X-ray energy dependence of the various luminescence peaks, we have determined the local environment of the sites where these peaks originate.

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