The intensity of photoluminescence (PL) peaks at 4.1 eV (300 nm) and 3.1 eV
(400 nm) for the buried oxide (BOX) layer of SIMOX structures is less for
triple-implant than for single implant samples and is further reduced in si
ngle-implant sample by supplemental oxygen implantation. Heat treatment of
samples from which the top Si layer was removed decreases the PL intensity
in the ultraviolet (UV) region even further. The behavior of the PL is main
ly attributed to oxygen deficiency centers in the surface region of a-Si na
noclusters in the BOX layer.