Flexible electronics are electronic devices built on bendable, stretchable or foldable substrates instead of rigid silicon wafers. This field aims to integrate electronic functionality into everyday objects, textiles and even biological tissues while maintaining performance under mechanical deformation.

A central approach uses thin films of semiconductors and conductors on plastic or elastomeric substrates. Researchers develop stretchable interconnects that form serpentine or wavy patterns, allowing circuits to elongate without breaking. Ultra thin devices only micrometers thick can conform closely to curved surfaces, such as skin or organs, and still function reliably.

Materials research is crucial. Organic semiconductors, conductive polymers, metal nanowires, graphene and other two dimensional materials are explored for their combination of flexibility, conductivity and processability at low temperatures. Hybrid strategies combine high performance inorganic components, like silicon nanomembranes, with soft substrates to preserve speed and stability while gaining mechanical compliance.

Applications span wearable health monitors, soft robotics, foldable displays, smart packaging and implantable bioelectronics. Skin like sensor patches can continuously measure physiological signals such as temperature, motion or electrical activity. In medicine, flexible probes and implants conform to tissue, improving contact quality and reducing damage.

Key challenges include maintaining electrical performance during repeated bending or stretching, developing scalable and low cost fabrication methods like printing and roll to roll processing, and ensuring long term stability in real environments or inside the body. Ongoing work focuses on improving material durability, integrating energy storage and harvesting, and creating complete flexible systems that include sensors, processors, communication units and power in a single soft platform.