Generating electrical power from waste heat

This tiny silicon-based device can catch and convert waste heat into electrical power. The rectenna, short for rectifying antenna, is made of common aluminum, silicon and silicon dioxide using standard processes from the integrated circuit industry. Image: Randy Montoya/Sandia National Laboratories

Silicon device catches, channels and converts heat into power

Infrared rectenna production uses common, scalable processes

Future work to improve infrared rectenna efficiency