Phase equilibria in InAsSbP quaternary alloys grown by liquid phase epitaxy |
| |
Authors: | M R Wilson A Krier Y Mao |
| |
Affiliation: | (1) Department of Chemistry, University of Durham, South Road, DH1 3LE Durham, UK;(2) School of Physics & Chemistry, University of Lancaster, LA1 4YB Lancaster, UK |
| |
Abstract: | The quaternary alloy InAs1−x−ySbxPy, lattice-matched to InAs, is a promising material for the production of infrared light sources for the detection of gases
in the 2–4 μm region of the spectrum. In this work, thermodynamic phase equilibrium calculations have been carried out to
determine the compositions required for liquid phase epitaxial growth and the extent of the miscibility gap in the solid material.
For high band gap materials, the desired growth temperature is found to be intermediate between a low temperature required
to grow P-rich solids and higher temperatures required to avoidspinodal decomposition. Conventional LPE growth at an intermediate temperature of 583°C is found to produce good material with high
luminescence efficiency and excellent optical characteristics. Problems with phosphorus loss from the melt are also discussed
and lower growth temperatures are found to considerably reduce this problem. Growth in the metastable region between the binodal
and spinodal lines has been achieved with the production of phosphorus-rich solids with concentrations up to y = 0.445. |
| |
Keywords: | InAsSbP liquid phase epitaxy miscibility gap phase diagrams spinodal decomposition |
本文献已被 SpringerLink 等数据库收录! |
|