Analysis on porous Si PL from quantum confinement effect

摘要

We have measured the variation of photoluminescence (PL) in porous silicon with anodization(AO) time, HF soak time or natural oxidation time, and found that the peak value of PL spectrum will shift towards shorter value as above time is increased. The analyses in experiment and theory show that the quantum confined structures produced by the AO process may be responsible for the blue shift,