In-situ observation of ion beam-induced nanostructure formation on a Cu(In,Ga)Se2 Surface

Title
In-situ observation of ion beam-induced nanostructure formation on a Cu(In,Ga)Se2 Surface
Authors
이지영성원경조민웅이광렬박종구문명운양철웅
Keywords
CIGS; Nanodot; Ion Beam; phase transition; FIB; self-assembly; nanostructure; in-situ SEM
Issue Date
2012-11
Publisher
Surface and interface analysis : SIA
Citation
VOL 44, NO 11-12, 1542-1546
Abstract
We report a phenomenological study of Cu(In,Ga)Se2 (CIGS) dots and their morphological transition into nano-ridge shapes induced by application of a focused ion beam (IB) to CIGS film. Real-time observations of nano-structure evolution during IB irradiation were obtained by recording sequential images at various ion energies of 1 to 30 keV. We observed that as irradiation time increased, the dots became larger and developed elongated ridge structures under continuous sputtering. This transition process was induced by a combination of the Ostwald ripening processes and cluster diffusion. Compositional analysis revealed that the nano-dots changed from pristine CIGS to Cu-rich CIGS. The Ga content of the dots was also found to increase due to sputtered implantation, while levels of In and Se decreased.
URI
http://pubs.kist.re.kr/handle/201004/45702
ISSN
01422421
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KIST Publication > Article
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