Piezo‐Phototronic In2Se3 Nanosheets as a Material Platform for Printable Electronics toward Multifunctional Sensing Applications

• DOI: 10.1002/admt.202300203
• Publication Date: 2023-06-16T05:38:41Z
• Authors: Christos Polyzoidis; Konstantinos Rogd...; George Veisakis; Dimitris Tsikritzis; Payam Hashemi; Hyejung Yang; Zdeněk Sofer; Ali Shaygan Nia; Xinliang Feng; Emmanuel Kymakis
• Keywords: Photocurrent

Abstract A facile, ultralow‐cost, and up‐scalable printable manufacturing process of flexible, multifunctional sensors that respond to more than one external stimulus could have a pivotal role in low‐cost wearables portable systems for Industry 4.0. Herein, using low capex, in‐house spray coating system, the fabrication photodetector is tuneable by mechanical strain exploiting piezo‐phototronic nature defect‐free 2D In 2 Se 3 nanosheets reported. Moreover, force different levels applied are spray‐coated nanosheets. Regarding photodetector, nonmonotonic asymmetric effect on photocurrent response shown exhibiting local maximum at 23°–32° compressive angle range slight hysteresis. Forward bending leads enhancement 27% 32° reverse 31% 23°, while tensile current suppression 8–10% angle. The resulting sensor repeatably demonstrates discrete piezoelectric voltages millivolt scale upon mass loads, opening path tactile sensing applications. Applying industrially compatible materials underlying flexible substrate electrodes, combined with coating, removes complexities engage costly energy intensive fabrication.