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Proceedings Paper

Epitaxy of narrow gap IV-VI materials on Si(111) and Si(100) substrates: growth, properties, and thermal mismatch strain accommodation
Author(s): Hans Zogg; Peter Mueller; Alexander Fach; Joachim John; Carmine Paglino; A. N. Tiwari
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Paper Abstract

IV-VI materials (PbTe, PbSe, Pb1-xSnxSe) are grown by molecular beam epitaxy onto Si(111) and Si(100) substrates. Device quality layers are obtained on Si(111), if a very thin CaF2, or a stacked CaF2/BaF2 buffer layer is employed. For these layers, thermal mismatch strain relaxation occurs by glide along the main {100} glide planes inclined by 54 degrees with respect to the surface. Cumulative plastic deformation on temperature cycling up to 500% was observed even at cryogenic temperatures, while the structural quality of the layers was only slightly adversely affected by such extreme plastic deformations. Interaction probabilities between moving dislocations were estimated to be below 10-5. Epitaxial growth of IV-VI materials directly on Si (without buffer layer) is possible, too. However, the structural quality is inferior. On Si(111), PbSe with either (100), (111) or mixed (111) and (100) orientation, depending on growth temperature, is obtained. Single oriented (100)PbSe layers result on Si(100). Strain relaxation occurs via the same mechanisms as for layers grown with buffer layers: On Si(111), strain relaxes by slip, while on Si(100), both relaxation by plastic deformation as well as by cracking is observed. The latter occurs for layers thicker than about 0.5 micrometers only.

Paper Details

Date Published: 1 September 1995
PDF: 8 pages
Proc. SPIE 2554, Growth and Characterization of Materials for Infrared Detectors II, (1 September 1995); doi: 10.1117/12.218196
Show Author Affiliations
Hans Zogg, Swiss Federal Institute of Technology (Switzerland)
Peter Mueller, Swiss Federal Institute of Technology (Switzerland)
Alexander Fach, Swiss Federal Institute of Technology (Switzerland)
Joachim John, Swiss Federal Institute of Technology (Switzerland)
Carmine Paglino, Swiss Federal Institute of Technology (Switzerland)
A. N. Tiwari, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 2554:
Growth and Characterization of Materials for Infrared Detectors II
Randolph E. Longshore; Jan W. Baars; Avishai Kepten; John M. Trombetta, Editor(s)

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