RAMAN ANALYSIS OF LIGHT-EMITTING POROUS SILICON

Porous silicon that strongly emits in the visible was analyzed using Raman scattering. The spectrum peaks near 508 cm-1, has a width of approximately 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 t...

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Veröffentlicht in:	Applied physics letters 1992-04, Vol.60 (17), p.2086-2088
Hauptverfasser:	SUI, ZF, LEONG, PP, HERMAN, IP, HIGASHI, GS, TEMKIN, H
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Infrared and raman spectra and scattering Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Physical Sciences Physics Physics, Applied Science & Technology
Online-Zugang:	Volltext
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Zusammenfassung:	Porous silicon that strongly emits in the visible was analyzed using Raman scattering. The spectrum peaks near 508 cm-1, has a width of approximately 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.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.107097