LED's efficiency exceeds 100%

(PhysOrg.com) -- For the first time, researchers have demonstrated that an LED can emit more optical power than the electrical power it consumes. Although scientifically intriguing, the results won’t immediately result ...

Arizona solar plant achieves six hours after sun goes down

(Phys.org) —Abengoa's Solana plant in the desert near Gila Bend, Arizona, passed commercial testing this week The 280-megawatt Solana solar thermal power plant producing electricity without direct sunlight made the announcement ...

What are the different types of renewable energy?

Renewable energy is becoming an increasingly important issue in today's world. In addition to the rising cost of fossil fuels and the threat of Climate Change, there has also been positive developments in this field which ...

Development of graphene transistor with new operating principle

AIST researchers have developed a graphene transistor with a new operating principle. In the developed transistor, two electrodes and two top gates are placed on graphene and graphene between the top gates is irradiated with ...

World record solar cell with 44.7% efficiency

German Fraunhofer Institute for Solar Energy Systems, Soitec, CEA-Leti and the Helmholtz Center Berlin announced today that they have achieved a new world record for the conversion of sunlight into electricity using a new ...

Converting waste heat into electricity

Bruce White worked with semiconductors and transistors at Motorola and Texas Instruments. But when he left industry for a position on Binghamton University's faculty, the materials scientist decided to take his research in ...

Study explains the mystery of ball lightning

(Phys.org)—Sightings of ball lightning have been made for centuries around the world – usually the size of a grapefruit and lasting up to twenty seconds – but no explanation of how it occurs has been universally accepted ...

page 1 from 40