Fig. 3. Optical properties of the synthesized SiNPs; (a) absorption spectra (red curve) and emission spectra (blue curve), and (b) excitation wavelength-independent photoluminescence behavior along with excitation wavelength ranging from 300 nm to 380 nm. (c) PL lifetime measurement of the synthesized SiNPs using time resolved spectroscopy, and (d) TEM image of SiNPs with Fe(iii) ions.
