講演情報
[9p-A33-4]Evaluation of Highly Stretchable Substrates for Flexible 2D Material Devices
〇YihRen Chang1, Yoshiaki Hattori1, Masatoshi Kitamura1 (1.Kobe Univ.)
キーワード：
2D materials、Flexible Device、Strain engineering
Recently, flexible devices based on two-dimensional (2D) materials have attracted significant attention. For example, 2D-material-based piezoelectric generators can provide high power density, while strain-engineered 2D materials exhibit unique properties such as the bulk photovoltaic effect. Since these phenomena rely on strain-induced non-centrosymmetric structures, substrates that can sustain large strain and efficiently transfer it to 2D materials are essential for flexible electronics. However, in most previous studies, the strain applied to 2D materials is typically below 2%, far below the fracture strain of monolayer (1L) 2D materials, which can exceed 10%. Compared with common flexible substrates such as polyethylene terephthalate (PET) and polyimide (PI), polydimethylsiloxane (PDMS) can exhibit extremely high elongation at break. In this work, PDMS substrates with high cross-linking density were fabricated as flexible supports to achieve larger strain in 2D layers for future electronic applications.