Morphological and microstructural evolution of PbSe films grown on thermally oxidized Si (111) substrates by chemical bath deposition

Title
Morphological and microstructural evolution of PbSe films grown on thermally oxidized Si (111) substrates by chemical bath deposition
Authors
서상희김긍호Youngjoon Suh이수연
Keywords
Lead selenide; Chemical bath deposition; Morphology; Scanning electron microscopy; Transmission electron microscopy
Issue Date
2017-04
Publisher
Thin solid films
Citation
VOL 628-157
Abstract
Morphological and microstructural evolution of the PbSe films on the thermally oxidized Si (111) substrates during chemical bath deposition was studied by SEM, XRD and TEM. At the very early stage of deposition, sub-micron scale hemispherical particles are formed on the substrate and they grow with deposition time. The hemispherical particles consist of PbSe, PbSeO4, and PbO2 nanocrystals. Soon after appearance of hemispherical particles, small single crystalline PbSe cuboid particles begin to form mostly on the hemispherical particles and grow with deposition time. At the end of deposition, hemispherical particles are completely replaced by cuboid particles. The cluster mechanism seems to be working at the early stage of deposition, while the ion-by-ion mechanism dominates at the later stage of deposition. The classical heterogeneous nucleation theory is also needed to explain why hemispherical particles are nucleated in the initial stage, and cuboid particles are formed in the later stage of deposition.
URI
http://pubs.kist.re.kr/handle/201004/66632
ISSN
0040-6090
Appears in Collections:
KIST Publication > Article
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