Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > News > Tapping into space for energy

August 3rd, 2007

Tapping into space for energy

Abstract:
The simplest way to convert solar radiation into electricity is by using the so-called extrinsic photo effect, whereby particles of light "knock out" electrons from a screen put up in their path. Soviet scientists from the Leningrad Physical and Technical Institute were the first to produce an electric current in that fashion in the 1930s. True, the efficiency of the first solar sulfur-helium elements was barely 1%. But starting in 1958, silicon solar batteries became the main source of electric power on spacecraft. By the mid-1970s, their efficiency approached 10%, where it remained for nearly two decades. It was only in the mid-1990s that it went up to 15%, and, by the turn of the new century, it had reached 20%.

This was achieved mainly by improving the technique for producing pure silicon - the basic material for making solar cells - from quartzites. The largest deposits of very pure quartzites are found in Russia, which had vast reserves of them. Recently the Joint Institute for Nuclear Research in Dubna, near Moscow, developed a photo cell with an efficiency of almost 50%. Scientists describe their product as a "star battery." It is an example of how nanotechnology can improve the workings of well-known processes.

Source:
en.rian.ru

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Energy

In quest for better lithium-air batteries, chemists boost carbon's stability: Nanoparticle coatings improve stability, cyclability of '3DOm' carbon February 25th, 2015

New nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDs and solar cells February 25th, 2015

Learning by eye: Silicon micro-funnels increase the efficiency of solar cells February 25th, 2015

Magnetic nanoparticles enhance performance of solar cells X-ray study points the way to higher energy yields February 25th, 2015

Aerospace/Space

National Space Society and Space Frontier Foundation announce the formation of the Alliance for Space Development February 25th, 2015

Rosetta Team Wins the National Space Society's Science and Engineering Space Pioneer Award February 23rd, 2015

A new spin on spintronics: Michigan team tests radiation-resistant spintronic material, possibly enabling electronic devices that will work in harsh environments February 17th, 2015

Mars Science Laboratory (Curiosity) Rover and Science Team Wins the National Space Society's von Braun Award February 13th, 2015

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Scientific breakthrough in rechargeable batteries: Researchers from Singapore and Québec Team Up to Develop Next-Generation Materials to Power Electronic Devices and Electric Vehicles February 28th, 2015

In quest for better lithium-air batteries, chemists boost carbon's stability: Nanoparticle coatings improve stability, cyclability of '3DOm' carbon February 25th, 2015

Dendrite eraser: New electrolyte rids batteries of short-circuiting fibers: Solution enables a battery with both high efficiency & current density February 24th, 2015

New Paper-like Material Could Boost Electric Vehicle Batteries: Researchers create silicon nanofibers 100 times thinner than human hair for potential applications in batteries for electric cars and personal electronics February 20th, 2015

Solar/Photovoltaic

New nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDs and solar cells February 25th, 2015

Learning by eye: Silicon micro-funnels increase the efficiency of solar cells February 25th, 2015

Magnetic nanoparticles enhance performance of solar cells X-ray study points the way to higher energy yields February 25th, 2015

Researchers enable solar cells to use more sunlight February 25th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE