Pg. Middleton et al., ALTERNATIVE SUBSTRATES FOR GALLIUM NITRIDE EPITAXY - PHOTOLUMINESCENCE AND MORPHOLOGICAL INVESTIGATIONS, Materials science & engineering. B, Solid-state materials for advanced technology, 43(1-3), 1997, pp. 154-156
Gallium nitride films grown by molecular beam epitaxy (MBE) an (0001)
sapphire, lithium gallate and gallium arsenide (111)B substrates have
been characterized using atomic force microscopy and photoluminescence
spectroscopy. Inhomogeneities in the sapphire-based material are furt
her explored via fluorescence imaging. Layers grown on GaAs substrate
are shown to display superior luminescence properties and excellent su
rface morphology. (C) 1997 Elsevier Science S.A.