Abstract
SiOx films with a nominal x-value (1≤x≤2) were deposited on flat-surface silicon substrates by reactive r.f. magnetron sputtering at substrate temperatures of 20 and 500°C, respectively. X-ray diffraction and high resolution TEM investigations of SiOx films with x=1.45 and x=1 show that as-deposited films have an amorphous structure. After annealing, a nucleation of Si nanocrystals was found with increasing size at increasing initial Si concentration and annealing temperature. The weak photoluminescence in the visible region of as-deposited SiOx films increases remarkably by annealing with dependence on x.
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