Self-powered wearable sensing devices for digital health

Self-powered wearable sensing devices are portable devices that convert environmental stimuli like light, heat, mechanical motion, and more into electrical signals to achieve health monitoring and data collection functions. Due to the flexibility, portability, and ability to combine with smart AI, self-powered wearable sensors are extensively utilized in digital health. This review focuses on self-powered wearable sensing devices that utilize human energy, introducing their power supply mechanism and efficiency improvement methods. It also provides an overview of the common structural and morphological features of self-powered wearable sensors currently used in healthcare. Besides, the specific applications of self-powered wearable sensors in digital healthcare are summarized. Finally, the technical bottlenecks, application prospects, and possible improvement strategies are discussed.