Understanding the parameters affecting the photoluminescence of silicon nanoparticles
- Llansola Portolés, Manuel Jose
- Pis Diez, Reinaldo
- Dell'arciprete, Maria Laura
- Caregnato, Paula
- Romero, Juan José
- Mártire, Daniel O.
- Azzaroni, Omar
- Ceolin, Marcelo Raul
- Gonzalez, Monica Cristina
DOIAbstract
Silicon nanoparticles of 1-5 nm size (SiNPs) were synthesized by a bottom-up (BU) approach involving a chemical wet method. The contribution of different emitters to the overall excitation-emission matrix was analyzed on the assumption that pure substances existing in a unique form show an excitation wavelength-invariant emission spectrum. The occurrence of emitters differing in size and aggregation was supported by transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), time-resolved single photon counting, and time-resolved anisotropy experiments. The effect on photoluminescence (PL) of the particle surface oxidation as a result of aging is studied and compared to that of surface oxidized particles obtained by a top-d...
Add to ORKG