Abstract
We observe two Meyer-Neldel rules for the dc conductivity in porous silicon. One rule corresponds to extended-states transport and the other to transport by thermally activated hopping. The quantitative resemblance of the first rule to the one found in hydrogenated amorphous silicon (a-Si:H) indicates that in samples in which it is observed the conduction takes place in an a-Si:H-like tissue that wraps the luminescent crystallites. In samples where the second rule is observed the conduction appears to be either by activated hopping in this disordered tissue, or by intercrystallite hopping.
| Original language | English |
|---|---|
| Pages (from-to) | 2433-2436 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 78 |
| Issue number | 12 |
| DOIs | |
| State | Published - 24 Mar 1997 |