Spectroscopic investigation of electroluminescent porous silicon

Light-emitting porous Si that luminesce at room temperature exhibit a degradation of the electroluminescence with time and strong laser heating effects. Light emitting porous Si can be obtained by the anodic etching of p-type Si samples in a HF-ethanol solution, and its properties can be studied using an Auger or Raman spectroscopy. Photoluminescence is more efficient than electroluminescence.