Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Scientists demonstrate high-efficiency quantum dot solar cells

Abstract:
Research shows newly developed solar powered cells may soon outperform conventional photovoltaic technology. Scientists from the National Renewable Energy Laboratory (NREL) have demonstrated the first solar cell with external quantum efficiency (EQE) exceeding 100 percent for photons with energies in the solar range. (The EQE is the percentage of photons that get converted into electrons within the device.) The researchers will present their findings at the AVS 59th International Symposium and Exhibition, held Oct. 28 — Nov. 2, in Tampa, Fla.

Scientists demonstrate high-efficiency quantum dot solar cells

College Park, MD | Posted on October 28th, 2012

While traditional semiconductors only produce one electron from each photon, nanometer-sized crystalline materials such as quantum dots avoid this restriction and are being developed as promising photovoltaic materials. An increase in the efficiency comes from quantum dots harvesting energy that would otherwise be lost as heat in conventional semiconductors. The amount of heat loss is reduced and the resulting energy is funneled into creating more electrical current.

By harnessing the power of a process called multiple exciton generation (MEG), the researchers were able to show that on average, each blue photon absorbed can generate up to 30 percent more current than conventional technology allows. MEG works by efficiently splitting and using a greater portion of the energy in the higher-energy photons. The researchers demonstrated an EQE value of 114 percent for 3.5 eV photons, proving the feasibility of this concept in a working device.

Joseph Luther, a senior scientist at NREL, believes MEG technology is the right direction. "Since current solar cell technology is still too expensive to completely compete with non-renewable energy sources, this technology employing MEG demonstrates that the way in which scientists and engineers think about converting solar photons to electricity is constantly changing," Luther said. "There may be a chance to dramatically increase the efficiency of a module, which could result in solar panels that are much cheaper than non-renewable energy sources."

MORE INFORMATION ABOUT THE AVS 59th INTERNATIONAL SYMPOSIUM & EXHIBITION

The Tampa Convention Center is located along the Riverwalk in the heart of downtown Tampa at 333 S. Franklin St., Tampa, Florida, 33602.

ABOUT AVS

Founded in 1953, AVS is a not-for-profit professional society that promotes communication between academia, government laboratories, and industry for the purpose of sharing research and development findings over a broad range of technologically relevant topics. Its symposia and journals provide an important forum for the dissemination of information in many areas of science and technology, enabling a critical gateway for the rapid insertion of scientific breakthroughs into manufacturing realities.

####

For more information, please click here

Contacts:
Catherine Meyers

301-209-3088

Copyright © American Institute of Physics (AIP)

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Main meeting website:

Technical Program:

Housing and Travel Information:

Related News Press

News and information

From brittle to plastic in 1 breath: Rice University theorists show environments can alter 2-D materials' basic properties May 4th, 2015

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

New Nanodrug Produced in Iran from Milk Thistle May 4th, 2015

Antibacterial Ceramic Nanoparticles, Appropriate Material for Medical Devices May 3rd, 2015

Discoveries

From brittle to plastic in 1 breath: Rice University theorists show environments can alter 2-D materials' basic properties May 4th, 2015

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

Antibacterial Ceramic Nanoparticles, Appropriate Material for Medical Devices May 3rd, 2015

ORNL researchers probe chemistry, topography and mechanics with one instrument May 2nd, 2015

Announcements

From brittle to plastic in 1 breath: Rice University theorists show environments can alter 2-D materials' basic properties May 4th, 2015

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

New Nanodrug Produced in Iran from Milk Thistle May 4th, 2015

Antibacterial Ceramic Nanoparticles, Appropriate Material for Medical Devices May 3rd, 2015

Energy

Engineering a better solar cell: UW research pinpoints defects in popular perovskites May 1st, 2015

Artificial photosynthesis could help make fuels, plastics and medicine April 29th, 2015

Unique microscopic images provide new insights into ionic liquids April 28th, 2015

ISDC To Showcase Northrop Grumman/Caltech Push Toward Space Solar Power April 28th, 2015

Events/Classes

Nanometrics to Present at the B. Riley & Co. 16th Annual Investor Conference May 2nd, 2015

No Hogwarts invitation required: Invisibility cloaks move into the real-life classroom: A new solid-state device can demonstrate the physical principles of invisibility cloaks without special equipment or magic spells April 30th, 2015

A phone with the ultimate macro feature: New attachment turns a smartphone into a microscope that can image and size DNA molecules 50,000 times thinner than a human hair April 29th, 2015

Arrowhead to Present at Upcoming Conferences April 28th, 2015

Quantum Dots/Rods

QD Vision Wins 2015 Bronze Edison Award for Color IQ™ Quantum Dot Technology April 26th, 2015

QD Vision Expands Product Line with Two-Millimeter Color LCD Display Optic: Color IQ™ Optic Enables Full-Color Gamut for Ultra-Thin Displays and All-in-One Computers April 16th, 2015

Promising future of quantum dots explored in conference: ‘20 Years of Quantum Dots at Los Alamos’ runs April 12-16 April 13th, 2015

Next important step toward quantum computer: Scientists at the University of Bonn have succeeded in linking 2 different quantum systems March 30th, 2015

Solar/Photovoltaic

Engineering a better solar cell: UW research pinpoints defects in popular perovskites May 1st, 2015

Artificial photosynthesis could help make fuels, plastics and medicine April 29th, 2015

Unique microscopic images provide new insights into ionic liquids April 28th, 2015

Pseudoparticles travel through photoactive material: KIT scientists measure important process in the conversion of light energy -- publication in Nature Communications April 24th, 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