Research Article
Effect of Silicon Crystal Size on Photoluminescence Appearance in Porous Silicon
Table 1
Variation of physical properties as a function of HF concentration and corresponding Si crystallites size of sample a, b, and c.
| | Sample details | Electrolyte | Pore dia. | Porosity | Peak width | Phonon frequency shift | Si crystallites size | | (HF : ethanol) | (nm) | % | cm−1 | cm−1 | (nm) |
| | a | 3 : 7 |
10
|
54
|
8.3
|
−4
|
2.8
| | b | 4 : 6 |
8
|
45
|
4.9
|
−2
|
4.3
| | c | 6 : 4 |
3
|
30
|
4.2
|
−1
|
6.6
|
|
|
