Further evidence for quantum confinement in porous silicon

The origin of the photoluminescence (PL) of porous silicon is being extensively investigated. In this letter, we offer detailed analyses of the PL spectra, of which about 3%–5% show small extrema that superimpose the larger main peak. Spacing between these smaller maxima is reproducible and independ...

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Bibliographic Details
Published in:Applied physics letters 1993-05, Vol.62 (19), p.2408-2410
Main Authors: BEHRENSEMIER, R, NAMAVAR, F, AMISOLA, G. B, OTTER, F. A, GALLIGAN, J. M
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Photoluminescence
Physics
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Summary:The origin of the photoluminescence (PL) of porous silicon is being extensively investigated. In this letter, we offer detailed analyses of the PL spectra, of which about 3%–5% show small extrema that superimpose the larger main peak. Spacing between these smaller maxima is reproducible and independent of the main peak energy and sample history, while energy steps between them correlate with differences in the exciton energies due to changing the sizes of the quantum wires by complete monolayers of atoms.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.109380