2026-07-18 東京大学
図1：光とひずみを検知可能なフレキシブルマルチモーダルセンサの構造図
＜関連情報＞
- https://www.t.u-tokyo.ac.jp/press/pr2026-07-18-001
- https://www.science.org/doi/10.1126/sciadv.aee9547
周期的な座屈構造を持つ、歪みと光を検出する光学ベースの伸縮性マルチモーダルセンサー Optical-based stretchable multimodal sensors for detecting strain and light with periodic buckling structures
Tomohiro Anda, Yusuke Ebihara, Mari Koizumi, Kento Yamagishi, […] , and Takao Someya
Science Advances Published:17 Jul 2026
DOI:https://doi.org/10.1126/sciadv.aee9547
Abstract
Stretchable optoelectronic sensors are essential for next-generation wearable health monitoring; however, a critical limitation remains unresolved. When a stretchable photodetector deforms, the effective light-detection location shifts across the skin surface, complicating the interpretation of spatially localized physiological signals. Herein, we report a periodic-buckling stretchable organic photodetector (OPD) that enables dual optical and strain sensing within a single device, allowing real-time estimation of changes in the effective detection position. The open-circuit voltage (Voc) depends solely on light intensity, whereas the short-circuit current (Isc) reflects both light intensity and variations in the active area, enabling geometric localization of the photodetection site. The OPD exhibits stable performance under applied strains of up to 60%, with variations in Voc below 1.1% and a strain gauge factor of 0.44 derived from Isc. This approach addresses a key limitation of stretchable photodetectors and provides a pathway toward high-resolution, position-aware wearable optical biosensing.
