(0 0 l)-oriented Bi2Sr2Co2Oy and Ca3Co4O9 films: Self-assembly orientation and growth mechanism by chemical solution deposition
作者： Xuebin Zhu , Dongqi Shi , Shixue Dou , Yuping Sun , Qi Li
DOI: 10.1016/J.ACTAMAT.2010.04.021
关键词:
摘要: Abstract In this study, two typical cobaltate-based thermoelectric films, Bi 2 Sr Co O y (BSC) and Ca 3 4 9 (CCO), with structures of [Bi ][CoO ] [Ca CoO RS [CoO ], respectively, are prepared by a simple chemical solution deposition on SrTiO (1 0 0), (1 1 0), (1 1 1) single crystal substrates. X-ray results reveal that all films c -axis oriented regardless the orientation substrate, suggesting self-assembly orientation. Transmission electron microscopy reveals amorphous/delamination regions for BSC film stripes CCO inclined at 30° to interface, whereas parallel interfaces other films. The growth mechanism is established, driving force attributed syneresis stress due solvent evaporation. microstructures properties also studied discussed, conclusion layered cobaltates good candidates applications.
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