Polarized red and blue light emission from silicon-based nanostructures correlated with crystallographic axes

Bernhard Goller, Dmitry Kovalev

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
105 Downloads (Pure)

Abstract

Energy-selective photoluminescence spectroscopy of porous silicon has been used to study the morphology of porous silicon layers prepared from (110) silicon wafers. We demonstrate that the electric field vector of the red emission band is aligned along the principal crystallographic axes of bulk silicon. From these observations, we conclude that large and small silicon nanocrystals assembling the layers have different preferential crystallographic orientations. Oxidized porous silicon layers exhibit a blue emission band which is strongly polarized along the < 100 > crystallographic axes. This indicates that chain-like silicon clusters, preferentially aligned along the same crystallographic directions, are responsible for the blue emission.
Original languageEnglish
Article number233303
JournalPhysical Review B
Volume83
Issue number23
DOIs
Publication statusPublished - 27 Jun 2011

Fingerprint

Dive into the research topics of 'Polarized red and blue light emission from silicon-based nanostructures correlated with crystallographic axes'. Together they form a unique fingerprint.

Cite this