Nanosize structures connectivity in porous silicon and its relation to photoluminescence efficiency

Transmission electron microscopy is used to reveal the existence of an interconnected nanosize structure in porous silicon films. The interconnections of this nanostructure determine the photoexcited electron-hole pair separation and consequently the luminescence efficiency of the material. Efficien...

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Veröffentlicht in:	Applied physics letters 1993-10, Vol.63 (14), p.1927-1929
Hauptverfasser:	TESCHKE, O, ALVAREZ, F, TESSLER, L, KLEINKE, M. U
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Equations of state, phase equilibria, and phase transitions Exact sciences and technology Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Other solid inorganic materials Other topics in equations of state, phase equilibria, and phase transitions Photoluminescence Physics
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Beschreibung
Zusammenfassung:	Transmission electron microscopy is used to reveal the existence of an interconnected nanosize structure in porous silicon films. The interconnections of this nanostructure determine the photoexcited electron-hole pair separation and consequently the luminescence efficiency of the material. Efficient photoluminescence is obtained from structures which shows no connectivity.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.110651