کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1792891 | 1023660 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Lattice-mismatched InGaAs nanowires formed on GaAs(1 1 1)B by selective-area MOVPE Lattice-mismatched InGaAs nanowires formed on GaAs(1 1 1)B by selective-area MOVPE](/preview/png/1792891.png)
We grew on GaAs(1 1 1)B InGaAs nanowires with lattice-mismatched composition using catalyst-free selective-area metalorganic vapor phase epitaxy and analyzed the effect of lattice mismatch on crystal structure and quality. An energy dispersive X-ray microscopy analysis indicated that the atomic contents of group-III atoms, Ga and In, were constant with little dispersion along a 2 μm-long nanowire. This indicates that a possible difference in migration length between In and Ga atoms on the sidewall facets has no effect on the compositional distribution along the nanowires with lengths of up to 2 μm. Photoluminescence spectra for InGaAs planar layers grown on GaAs(1 0 0) and GaAs(1 1 1)B substrates showed no peak corresponding to the InGaAs band-edge emission, due to lattice mismatch between the layers and the substrate. However, the nanowires with a lattice mismatch of 2.1% showed a strong and sharp band-edge emission peak at 1.12 eV. This means that crystal quality of the InGaAs nanowires was better than that of the planar layers for a lattice-mismatched system.
Journal: Journal of Crystal Growth - Volume 315, Issue 1, 15 January 2011, Pages 148–151