Luminescence from porous silicon

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Predominantly orange-red, but occasionally green, blue or deep red luminescence is observed following electrochemical etching of p-type epitaxial silicon in HF solution. Photoluminescence and cathodoluminescence of the same samples are compared. The dependence of the photoluminescence spectrum on the sample temperature and on the excitation density, considered together with its nonexponential decay profile, suggest that the dominant luminescence process in porous silicon is recombination of quantum-confined carriers in a disordered medium. In addition, cathodoluminescence reveals the presence of 'hot spots' which show bright features of uncertain origin.

LanguageEnglish
Article number015
Pages92-96
Number of pages5
JournalSemiconductor Science and Technology
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Dec 1993

Fingerprint

Cathodoluminescence
Porous silicon
cathodoluminescence
porous silicon
Luminescence
Photoluminescence
luminescence
photoluminescence
Electrochemical etching
Silicon
etching
silicon
decay
profiles
excitation
Temperature
temperature

Keywords

  • luminescence
  • cathodoluminescence
  • silicon microcrystals

Cite this

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abstract = "Predominantly orange-red, but occasionally green, blue or deep red luminescence is observed following electrochemical etching of p-type epitaxial silicon in HF solution. Photoluminescence and cathodoluminescence of the same samples are compared. The dependence of the photoluminescence spectrum on the sample temperature and on the excitation density, considered together with its nonexponential decay profile, suggest that the dominant luminescence process in porous silicon is recombination of quantum-confined carriers in a disordered medium. In addition, cathodoluminescence reveals the presence of 'hot spots' which show bright features of uncertain origin.",
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Luminescence from porous silicon. / Chen, X; Uttamchandani, D; Trager-Cowan, C; O'Donnell, K P.

In: Semiconductor Science and Technology, Vol. 8, No. 1, 015, 01.12.1993, p. 92-96.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Chen, X

AU - Uttamchandani, D

AU - Trager-Cowan, C

AU - O'Donnell, K P

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AB - Predominantly orange-red, but occasionally green, blue or deep red luminescence is observed following electrochemical etching of p-type epitaxial silicon in HF solution. Photoluminescence and cathodoluminescence of the same samples are compared. The dependence of the photoluminescence spectrum on the sample temperature and on the excitation density, considered together with its nonexponential decay profile, suggest that the dominant luminescence process in porous silicon is recombination of quantum-confined carriers in a disordered medium. In addition, cathodoluminescence reveals the presence of 'hot spots' which show bright features of uncertain origin.

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KW - silicon microcrystals

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