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Manufacturing of stretchable substrate with biaxial strain control for highly-efficient stretchable solar cells and displays
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Manufacturing of stretchable substrate with biaxial strain control for highly-efficient stretchable solar cells and displays
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Journal Article
Manufacturing of stretchable substrate with biaxial strain control for highly-efficient stretchable solar cells and displays
2023
Overview
There has been significant research focused on the development of stretchable materials that can provide a large area with minimal material usage for use in solar cells and displays. However, most materials exhibit perpendicular shrinkage when stretched, which is particularly problematic for polymer-based substrates commonly used in stretchable devices. To address this issue, biaxial strain-controlled substrates have been proposed as a solution to increase device efficiency and conserve material resources. In this study, we present the design and fabrication of a biaxial strain-controlled substrate with a re-entrant honeycomb structure and a negative Poisson’s ratio. Using a precisely machined mold with a shape error of less than 0.15%, we successfully fabricated polydimethylsiloxane substrates with a 500 μm thick re-entrant honeycomb structure, resulting in a 19.1% reduction in perpendicular shrinkage. This improvement translates to a potential increase in device efficiency by 9.44% and an 8.60% reduction in material usage for substrate fabrication. We demonstrate that this design and manufacturing method can be applied to the fabrication of efficient stretchable devices, such as solar cells and displays.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
