The wind farms would affect ground temperatures!

The wind farms would...

Wind turbines could affect the climate by increasing the ground temperature during the night That’s what researchers has demonstrated over a period of more than nine years studying...

Eole Water collects water with wind turbines

Eole Water collects ...

French company Eole Water based in Sainte Tulle, designer of wind turbines capable of recovering drinking water from the humid air, will now market its offering for isolated communities...

Printable liquid solar cells

Printable liquid sol...

Scientists at the University of Southern California (USC) announced a promising pathway in the design of cheap solar cells capable of being used as liquid ink painting or printing on...

EDF EN takes a position on the Moroccan market

EDF EN takes a posit...

The consortium led by EDF Energies Nouvelles, in partnership with the Japanese group Mitsui & Co., was selected as “preferred bidder” by the Moroccan ONE (Office National...

Offshore Wind: 2 billion order for Alstom

Offshore Wind: 2 bil...

Alstom confirmed the plan developed for the industrial consortium led by EDF Energies Nouvelles, which won three fields of the tender issued by the French Government for the installation...

Black solar cells that absorb 99.7% of the light!

Black solar cells th...

Researchers at Natcore Technology have created a silicon wafer whose average reflectance is only 0.3% in the region of the solar spectrum – visible and near infrared – which...

Find out why wind turbines hate insects!

Find out why wind tu...

Operators of large wind turbines now have over 10 years of feedback on actual performance of their machines. Usually made of resin and fiberglass, coatings of the blades are subject...

Greece plays its trump card with the mega-solar project Helios

Greece plays its tru...

Günther Oettinger, the European Commissioner for Energy last week called on Greece to do everything possible to ensure the progress of the mega-production of photovoltaic energy, Helios. The...



Researchers find another way to harvest solar energy

Engineers at Stanford University have discovered a new way to harvest light and thermal energy produced by the Sun. An article published in the Nature Materials journal shows that the cesium coating of solar cell semiconductor material allows the cell to use the light and heat to produce electricity.

According to the idea that the more heat, the less efficient photovoltaic solar panels tend to be, researchers have developed a process known as photon enhanced thermionic emission, or PETE, who theoretically could use waste heat to improve photovoltaic efficiency up to 50 percent.

PETE solar cell unites in one component quantum mechanism of solar cells, where the photons excite the electrons, with the thermal mechanism, which uses concentrated sunlight as a source of energy to produce electricity indirectly through a heat engine.

Scientists who tested cesium gallium nitride coated PETE device inside a vacuum chamber are also studying other conductive materials such as gallium arsenide.

Many photovoltaic solar cells become less effective under conditions of greater than 100 degrees Celsius. But Pete reaches its maximum efficiency in more than 200 ° C, the researchers said. This bodes well for the potential of PETE and solar concentrators, such as parabolic trough collectors.



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