Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > News > Better photocells from bigger Buckyballs

April 15th, 2009

Better photocells from bigger Buckyballs

Abstract:
Much research activity is presently devoted to organic photovoltaic devices (OPV), in particular ones comprising polymers as donors and a variety of C60 fullerenes with organic molecules attached as acceptors. Now, a group of scientists collaborating from several research institutions, namely the Georgetown University, Washington DC, Luna Innovations Inc., Virginia, the Friedrich-Alexander-Universität, Erlangen, Germany, the National Renewable Energy Laboratory, Colorado, and the University of Santa Barbara have developed a novel fullerene species for this application [Ross, et al., Nature Materials (2009), doi:10.1038/NMAT2379].

"We believe that our discovery is a significant contribution to the improvement in conversion efficiencies of organic solar cells," says Martin Drees, corresponding author. In contrast to the acceptor materials utilized to date, Drees and his colleagues used fullerenes large enough to incarcerate trimetallic nitrides (therefore called trimetallic nitride endohedral fullerenes, or TNEFs) and filled them with Lu3N. The main advantage over the presently used empty C60 molecules and their derivatives is the higher open circuit voltage. Drees and his group found values of about 890 mV (in comparison to 630 mV for present state-of-the-art C60 devices), in fact the highest reported for any fullerene OPV. The reason for the low voltage output of the C60 devices is the orbital mismatch of the donor polymer and the fullerene acceptors, a situation which the researchers could significantly improve by incorporating Lu3N-ions in the bigger fullerenes.

Source:
materialstoday.com

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Discovery of nanotubes offers new clues about cell-to-cell communication July 2nd, 2015

Nanospiked bacteria are the brightest hard X-ray emitters July 2nd, 2015

Engineering the world’s smallest nanocrystal July 2nd, 2015

Producing spin-entangled electrons July 2nd, 2015

Announcements

Nanospiked bacteria are the brightest hard X-ray emitters July 2nd, 2015

Engineering the world’s smallest nanocrystal July 2nd, 2015

Producing spin-entangled electrons July 2nd, 2015

NIST Group Maps Distribution of Carbon Nanotubes in Composite Materials July 2nd, 2015

Energy

New technology using silver may hold key to electronics advances July 2nd, 2015

Visible Light-Sensitive Photocatalysts Used for Purification of Contaminated Water in Iran June 30th, 2015

June 29th, 2015

Making new materials with micro-explosions: ANU media release: Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th, 2015

Solar/Photovoltaic

Making new materials with micro-explosions: ANU media release: Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th, 2015

Spain nanotechnology featured at NANO KOREA 2015 June 26th, 2015

Stanford researchers stretch a thin crystal to get better solar cells June 25th, 2015

Toward tiny, solar-powered sensors: New ultralow-power circuit improves efficiency of energy harvesting to more than 80 percent June 23rd, 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