Raman analysis of light-emitting porous silicon
- 27 April 1992
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 60 (17), 2086-2088
- https://doi.org/10.1063/1.107097
Abstract
Porous silicon that strongly emits in the visible was analyzed using Raman scattering. The spectrum peaks near 508 cm−1, has a width of ∼40 cm−1, and is very asymmetric. Using a model of phonon confinement, this suggests that the local structure of porous silicon is more like a sphere than a rod and has a characteristic diameter of 2.5–3.0 nm. Polarization Raman measurements suggest that the structure does not consist of a series of parallel columns.Keywords
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