In:
Journal of Applied Physics, AIP Publishing, Vol. 95, No. 10 ( 2004-05-15), p. 5532-5539
Abstract:
The growth mechanism for a single-crystalline film of InGaO3(ZnO)5 (IGZO) on a (111)-oriented yttria-stabilized-zirconia substrate by reactive solid-phase epitaxy was studied by high-resolution x-ray diffraction, transmission electron microscopy, and atomic force microscopy. We focused on the role of the 2-nm-thick ZnO epitaxial layer during the structural evolution of the 200-nm-thick polycrystalline- (poly-) IGZO layer while thermal annealing. When a thin ZnO epitaxial layer was formed before depositing the poly-IGZO layer, thin single-crystalline epitaxial IGZO seeds were initially formed only on the substrate surface or on the thin ZnO epitaxial layer through a solid-phase reaction between the ZnO epitaxial layer and the poly-IGZO layer. A single-crystalline IGZO layer grew from the IGZO seeds toward the top surface of the film along with a much faster lateral grain growth, which formed a large-area single-crystalline IGZO film with an atomically flat terraced and stepped surface. On the other hand, an epitaxial film was not obtained unless a ZnO epitaxial layer was used, demonstrating that the ZnO epitaxial layer plays a crucial role as the seed for subsequent crystallite growth and a template for determining the crystallographic orientation.
Type of Medium:
Online Resource
ISSN:
0021-8979
,
1089-7550
Language:
English
Publisher:
AIP Publishing
Publication Date:
2004
detail.hit.zdb_id:
220641-9
detail.hit.zdb_id:
3112-4
detail.hit.zdb_id:
1476463-5
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