Abstract
Nonequilibrium charge carrier relaxation dynamics in porous silicon was investigated by means of time-resolved photo-luminescence and ultrafast transient reflectance. Fluorescence band shift to the low energy side and intensity decay were observed during several initial nanoseconds under porous silicon excitation at 3.3 eV, and attributed to the spectral diffusion and trapped carrier recombination. Ultrafast transient reflectance pump-probe technique reveals reflectance dynamics on a several ps time scale present with 3.1 eV excitation, but absent with excitation at 1.77 eV.
| Original language | English |
|---|---|
| Pages (from-to) | 188-193 |
| Number of pages | 6 |
| Journal | Physica Status Solidi (A) Applications and Materials Science |
| Volume | 207 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2010 |
| Externally published | Yes |