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XRD patterns of grown on (a) Si(111) and (b) Si(100) substrates at different temperatures.
SEM images of growth on (a) Si(111) and (b) Si(100) substrates.
Typical PL spectra of films grown on a silicon substrate and the details of emission peaks (inset).
Temperature dependence PL spectra of the films. The intensities have been normalized for comparison.
Temperature dependence of the peak energy of free exciton emission of .
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