“…For the as-deposited sample, two broad Raman emission bands can be seen with the center located at 150 and 470 cm À1 , respectively, which are originated from amorphous silicon. After annealing, a narrower and higher energy peak centered at 515.9 cm À1 is observed, indicating the formation of nanocrystalline silicon [13,14]. Unlike the silicon clusters in SRSO system, which usually contain amorphous silicon, the narrow Raman peak implies that the nanoclusters in SRA are well crystallized.…”