Self-Powered Flexible Sensors: Recent Advances, Technological Breakthroughs, and Application Prospects

Area of Science:

• Materials Science
• Electronics
• Energy Harvesting

Background:

• Traditional sensors require external power, limiting deployment and increasing maintenance.
• Self-powered sensors offer integrated energy harvesting and signal sensing capabilities.
• These sensors are crucial for flexible electronics, smart healthcare, and human-machine interaction.

Purpose of the Study:

• To review core technical paths of six major self-powered sensor types.
• To emphasize working principles and innovative material applications.
• To summarize breakthroughs in performance indicators and applications.

Main Methods:

• Review of frictional charge transfer, electrostatic induction, pyroelectric, hydrovoltaic, piezoelectric, and photovoltaic effects.
• Analysis of innovative material applications in self-powered sensors.
• Comparison of representative achievements in key performance indicators.

Main Results:

• Summary of breakthroughs in sensitivity, detection range, response speed, and cyclic stability.
• Overview of advancements in self-powering methods and energy conversion efficiency.
• Discussion of applications in wearable health monitoring, robotics, and implantable devices.

Conclusions:

• Self-powered sensors overcome traditional limitations, enabling diverse applications.
• Significant progress has been made in sensor performance and energy efficiency.
• Future directions address current challenges for technological iteration and industrial use.