Cathodoluminescence studies of the inhomogeneities in Sn-doped Ga2O3 nanowires.
Cathodoluminescence real-color imaging and spectroscopy were employed to study the properties of Ga(2)O(3) nanowires grown with different Sn/Ga ratios. The structures grown under Sn-rich conditions show large spectral emission variation, ranging from blue to red, with a green transition zone. Spectral emission changes correlate with changes in the chemical composition and structure found by energy dispersive spectroscopy and electron diffraction. A sharp transition from green to red emission correlates with a phase transition of beta-Ga(2)O(3) to polycrystalline SnO(2). The origin of the green emission band is discussed based on ab initio calculation results.
Maximenko
S I
SI
Electronics Science and Technology Division, US Naval Research Laboratory, Washington, DC 20375, USA.
Mazeina
L
L
Picard
Y N
YN
Freitas
J A
JA
Bermudez
V M
VM
Prokes
S M
SM
D005708:Gallium / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D036103:Nanotechnology; D053770:Nanowires / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D014001:Tin / Q000737:chemistry*
C038863:gallium oxide; D014001:Tin; D005708:Gallium