Photoluminescence Quenching of Porous Silicon by Molecule Adsorption

The photoluminescence of HNO₃ chemically oxidized porous silicon can be easily quenched by organic adsorbates, and the ability of quenching was quantitatively estimated by two models- Langmuir adsorption isotherm and Stern-Volmer. A strong steric effect of organic adsorbates on the photoluminescence quenching of oxidized porous silicon was observed.