Pressure-induced phase transition in porous silicon

High pressure studies of porous silicon reveal that a phase transition occurs at ∼170 kbar. The phase transition is detected by an abrupt change in color of porous silicon from orange-yellow to black. Photoluminescence measurements show an initial blue shift of the luminescence peak. At ∼25 kbar the...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Applied physics letters 1993-10, Vol.63 (16), p.2260-2262
Hauptverfasser: RYAN, J. M, WAMSLEY, P. R, BRAY, K. L
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:High pressure studies of porous silicon reveal that a phase transition occurs at ∼170 kbar. The phase transition is detected by an abrupt change in color of porous silicon from orange-yellow to black. Photoluminescence measurements show an initial blue shift of the luminescence peak. At ∼25 kbar the blue shift ceases and a reversal of shift is observed. The red shift continues up to ∼90 kbar at which point the luminescence is quenched. The shift reversal is interpreted as a pressure-induced direct–indirect transition in porous silicon. The results are best explained in the context of the quantum confinement model.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.110546