Bohnen T, Yazdi GR, Yakimova R, van Dreumel GWG, Hageman PR, Vlieg E,
Algra RE, Verheijen MA, Edgar JH
ScAlN
nanowires: A cathodoluminescence study
J. of Cryst. Growth 311 (2009) 3147-3151
Abstract:
Wurtzite ScAlN nanowires, grown on a scandium nitride (ScN) thin film
by hydride vapor phase epitaxy (HVPE), were analyzed by energy
dispersive analysis of X-rays (EDX), CL, high resolution transmission
electron spectroscopy (HRTEM), and scanning electron microscopy (SEM).
The wires were grown along the [0 0 0 1] axis, had an average length of
1 mu m, a diameter between 50 and 150 run, and a ScAlN composition with
a 95:5 Al:Sc ratio. Cathodoluminescence studies on the individual wires
showed a sharp emission near 2.4 eV, originating from the Sc atoms in
the aluminum nitride (AlN) matrix. The formation of such a
semiconducting ScAlN alloy could present a new alternative to InAlN for
optoelectronic applications operating in the 200-550 nm range.