Influence of Post-Growth Annealing on the Defects Nature and Distribution in VLS Grown (111) 3C-SiC Layers

The current communication focuses on the influence of a post-growth annealing on the evolution of defects inside (111) 3C-SiC layers grown by the Vapour Liquid Solid (VLS) mechanism in SiGe melts on Si-face on- and off axis 6H-SiC substrates. The layers are studied by Transmission Electron Microscop...

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Hauptverfasser: Sun, Jian Wu, Marinova, Maya, Lorenzzi, Jean, Ferro, Gabriel, Soulière, Véronique, Jegenyes, Nikoletta, Polychroniadis, Efstathios K., Zoulis, Georgios, Camassel, Jean, Mantzari, Alkyoni, Andreadou, Ariadne, Juillaguet, Sandrine
Format: Tagungsbericht
Sprache:eng
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Zusammenfassung:The current communication focuses on the influence of a post-growth annealing on the evolution of defects inside (111) 3C-SiC layers grown by the Vapour Liquid Solid (VLS) mechanism in SiGe melts on Si-face on- and off axis 6H-SiC substrates. The layers are studied by Transmission Electron Microscopy (TEM) and Low Temperature Photoluminescence (LTPL). It was found that the growth on off-axis substrates results in a 3C-SiC layer containing mainly stacking faults (SFs) and microtwins (MT). The density of MT lamellae and SFs reduces in the layers grown on the on-axis substrate compared to off-axis substrate. In the layers grown on off-axis substrates the annealing strongly reduces the density of SFs inclined to the 3C/6H-SiC interface. Additionally, 3C to 6H polytypic transformation appears only at the interface, most probably starting from substrate step edges. This was only seen on off-axis seed since the step edges are more.
ISSN:0255-5476
1662-9752
1662-9752
1662-9760
DOI:10.4028/www.scientific.net/MSF.679-680.241