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Fig. 2 SEM images of the buckled aluminum electrode. Buckled aluminum electrode with chemical bonding intervals of (a) 200 μm, (b) 400 μm, (c) 600 μm, and (d) 800 μm. The insets show the cross-sectional SEM images of the buckled aluminum electrodes with 150 μm of scale bar.
FROM:
Jiyoon Nam, Bowook Seo, Youngjoo Lee, Dong-Ho Kim and Sungjin Jo, “Cross-buckled structures for stretchable and compressible thin film silicon solar cells”, Scientific Reports, Vol. 7, Article Number 7575, August 2017, doi:10.1038/s41598-017-08012-y
ABSTRACT: Increasing interests in stretchable electronic devices have resulted in vigorous research activities, most of which are focused on structural configurations. Diverse structural configurations are available for stretchability, including stiff-island, serpentine, and buckled structures. With easily deformable shapes and simple fabrication processes, buckled structures have the potential to realize stretchability. However, conventional buckled structures exhibit stretchability only in a single-axis direction. In the present study, a new type of cross-buckled structure, which can overcome the limitations of conventional buckled structures is developed. The stretchable thin film solar cells with the cross-buckled structure showed stable mechanical and electrical characteristics under both stretching and compressing conditions. The cross-buckled structure for stretchable electronic devices is expected to broaden the fields of wearable electronics, stretchable displays, and biocompatible applications.
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