DLP 3D-Printed Nanogenerators: Rapid and Robust Fabrication Polymeric Microstructure Nanogenerator for Portable Energy Harvesting and Self-Powered Sensors

This paper presents a rapid and robust method for fabricating portable energy harvesting and flexible self-powered sensors using digital light processing (DLP) 3D printing. PEDOT:PSS/polyacrylate resin was used as conductive or positively charged material, with a conductivity of 4x10⁻² S/cm, while Teflon served as negatively charged material. The combination of DLP 3D printing and PEDOT:PSS allows for the precise creation of micro-dome structures, each with a diameter of 500 micrometers, in just a few minutes. The microstructural 3D-printed nanogenerator can create portable energy harvesting devices that reach up to 10V with finger tapping and maintain stable energy output for 900 cycles. A self-powered sensor is demonstrated, capable of capturing motion signals such as walking, running, and jumping, with the energy stored in capacitors.