Self-powered sensors is a research concept and technological paradigm focused on developing autonomous sensor systems that generate their operational energy directly from ambient environmental sources, eliminating the need for traditional external power supplies like batteries. This field investigates various energy harvesting mechanisms, power management strategies, and the integration of these components into compact, sustainable sensor nodes. Key characteristics include energy autonomy, reduced maintenance requirements, and suitability for long-term deployment in remote or inaccessible environments, with significance in enabling pervasive sensing networks for diverse applications and advancing sustainable technologies.