A comparison has been made between Raman spectra obtained from samples that have been crystallized at
different pulse energies (Fig. 2). As can be seen the graph spectra does not change much by increasing the energy.
That indicates that the samples are fully crystallized at energies less or equal to 330 mJ/cm2 and further increase of
energy does not lead to increase of crystallinity. The crystalline silicon spectrum in Figure 2 is given just for visual
comparison of broadening of Raman spectrum line in the case of p-Si.
Although crystallinity of the p-Si film does not change by increasing laser pulse energy, same cannot be said about
surface roughness and grain size of the film. As revealed by AFM measurements the starting a-Si film is very
smooth and has surface roughness of approximately 2.5 nm, and it stays relatively smooth (