Generating electrical power from waste heat

Directly converting electrical power to heat is easy. It regularly happens in your toaster, that is, if you make toast regularly. The opposite, converting heat into electrical power, isn't so easy.

Research boosts efficiency and stability of optical rectennas

The research team that announced the first optical rectenna in 2015 is now reporting a two-fold efficiency improvement in the devices—and a switch to air-stable diode materials. The improvements could allow the rectennas ...

New energy technologies promise brighter future

In three studies published in the current issue of Technology and Innovation – Proceedings of the National Academy of Inventors, innovators unveil creative technologies that could change our sources of energy, change our ...

Wireless power for the price of a penny

(Phys.org) -- The newspaper-style printing of electronic equipment has led to a cost-effective device that could change the way we interact with everyday objects.