Navigation Links
University of Florida physicists set new record for graphene solar cell efficiency
Date:5/25/2012

GAINESVILLE, Fla. Doping may be a no-no for athletes, but researchers in the University of Florida's physics department say it was key in getting unprecedented power conversion efficiency from a new graphene solar cell created in their lab.

Graphene solar cells are one of industry's great hopes for cheaper, durable solar power cells in the future. But previous attempts to use graphene, a single-atom-thick honeycomb lattice of carbon atoms, in solar cells have only managed power conversion efficiencies ranging up to 2.9 percent. The UF team was able to achieve a record breaking 8.6 percent efficiency with their device by chemically treating, or doping, the graphene with trifluoromethanesulfonyl-amide, or TFSA. Their results are published in the current online edition of Nano Letters.

"The dopant makes the graphene film more conductive and increases the electric field potential inside the cell," said Xiaochang Miao, a graduate student in the physics department. That makes it more efficient at converting sunlight into electricity. And unlike other dopants that have been tried in the past, TFSA is stable its effects are long lasting.

The solar cell that Miao and her co-workers created in the lab looks like a 5-mm-square window framed in gold. The window, a wafer of silicon coated with a monolayer of graphene, is where the magic happens.

Graphene and silicon, when they come together, form what is called a Schottky junction a one-way street for electrons that when illuminated with light, acts as the power conversion zone for an entire class of solar cells. Schottky junctions are commonly formed by layering a metal on top of a semiconductor. But researchers at the UF Nanoscience Institute for Medical and Engineering Technologies discovered in 2011 that graphene, a semi-metal, made a suitable substitute for metal in creating the junction.

"Graphene, unlike conventional metals, is transparent and flexible, so it h
'/>"/>

Contact: Arthur Hebard
afh@ufl.edu
352-222-6212
University of Florida
Source:Eurekalert

Page: 1 2

Related biology technology :

1. NIH Funds $1M Research at Quest Product Development and University of Colorado for New Digitally-Controlled Endoscopes
2. University of Pennsylvania scientists move optical computing closer to reality
3. RainDance Technologies Signs a Collaboration Agreement with sanofi-aventis and Louis Pasteur University to Launch dScreen Consortium within ALSACE BIOVALLEY cluster
4. University of Southern California Receives Cancer Diagnosis System for Detecting Esophageal Dysplasia
5. Stem Cell Transplantation Program at Hackensack University Medical Center: First in Nation to Receive Joint Commission Certification for Quality and First in New Jersey to be Named a Blue Distinction(R) Center for Specialty Care.
6. [video] Ronald Andrews, CEO of Clarient, Inc. Discusses Agreement With University of Pennsylvania School of Medicine on WallSt.nets 3-Minute Press Show
7. George Washington University Hospital Purchases Orthocrats TraumaCad(TM) for Orthopedic Preoperative Planning
8. Sigma-Aldrich and the University of Illinois Offer New Boronic Acid Surrogates to Researchers Worldwide Through Licensing Agreement
9. Brain and Hearing Pioneer, Michael Merzenich, Ph.D. to Speak at Case Western Reserve University
10. Stuart Parkin first distinguished professor at Eindhoven University of Technology
11. McMaster University unveils worlds most advanced microscope
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... 18, 2014 Bipartisan passage this week ... designed to stimulate development and commercialization of new technologies ... by leaders of SPIE, the international society for ... Manufacturing and Innovation (RAMI) Act, now moves to the ... said they are optimistic that it will win passage ...
(Date:9/18/2014)... Sept. 18, 2014 About POCT ... performed outside a clinical laboratory. It helps in ... appropriate treatments and medication. POCT is gaining popularity ... lifestyle diseases such as diabetes, heart disease, and ... devices are standardized to minimize errors during the ...
(Date:9/18/2014)... 2014 A novel robotic system that ... is currently being tested as part of a biomedical ... Boston with the aim of determining if the robot, ... cancer biopsies faster, more accurate, less costly, and less ... the potential to deliver prostate cancer therapies with greater ...
(Date:9/18/2014)... DUBLIN, Ireland , September 18, ... ,Research and Markets ( http://www.researchandmarkets.com/research/czvg3s/biocompatible ) ... "Biocompatible Materials - Global Strategic ... offering. ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) ,This report ... Materials in US$ Million by the ...
Breaking Biology Technology:House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 3POCT Market in China 2014-2018 2Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 2Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 3Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 4Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 5Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 6Biocompatible Materials - Global Strategic Business Report 2014 2Biocompatible Materials - Global Strategic Business Report 2014 3
... have a penchant for the CSI side of project management ... calls suggesting a spinoff. "CSI: Project Management" has such a ... recently is the flurry of news about Acela, the fast ... the story, cracks have developed in the disc brakes and ...
... some of the same technology used by Internet search engines ... crowded. , ,The University of Wisconsin-Madison E-Business Consortium ... efficiency, security and enterprise readiness in a recently published ... overall winner, ceding ground only in security to ...
... effective and proper networking techniques, you may not be maximizing ... other professionals. While people have their own networking style that ... ,You need to do what works best for you and ... learn new ideas about networking from other professionals who have ...
Cached Biology Technology:When innovation gets off track 2When innovation gets off track 3Improve your networking skills by learning from other professionals 2Improve your networking skills by learning from other professionals 3Improve your networking skills by learning from other professionals 4
(Date:9/21/2014)... significantly less likely to report taking iron supplements before ... who are developing normally, a study by researchers with ... iron intake was associated with a five-fold greater risk ... 35 or older at the time of the child,s ... as obesity hypertension or diabetes. , The research is ...
(Date:9/21/2014)... Contrary to what was previously thought, newborn immune T ... response to bacteria, according to a new study led ... very differently to that of adults, babies may still ... the study published in the journal Nature Medicine ... several different types of immune cells, including neutrophils which ...
(Date:9/19/2014)... University of Oklahoma biology professor will study the unique ... that could eventually benefit people,s health. The OU ... the energy required to produce the signals used to ... electric signals at a rate of 500-600 discharges a ... for the electric fish are extreme, but necessary for ...
Breaking Biology News(10 mins):Mothers of children with autism less likely to have taken iron supplements 2Immune system of newborn babies is stronger than previously thought 2
... reveals the interaction of genetic and environmental factors such ... explained Dr. Matthias Elstner of the Neurological Clinic of ... study. In addition, this genome-wide expression and association study ... both disease risk and therapy response ( Annals of ...
... not all the same when it comes to risk of ... researcher shows key differences among Hispanic populations that doctors should ... cardiovascular disease in this large and growing subset of the ... January 19, 2009 Journal of the American College of ...
... new quarterly newsletter for academic librarians and information professionals. ... developments at OUP and across the publishing world. ... and member of the Editorial Team said: ,After careful ... developed a strong and broad source of information for ...
Cached Biology News:Genetic risk factor identified for Parkinson's disease 2Crucial differences found among Latino populations facing heart disease risks 2
... Activins are polypeptide hormones which belong ... superfamily. The TGF- superfamily is a ... which control many aspects of development, ... Other members incude TGF-s, bone morphogenetic ...
... be able to handle larger sample volumes, automate ... as interface with telemetry systems. The AccuSampler ... dogs, pigs, and primates. The system may ... the computer can be located outside the animal ...
The new Silencer siRNA Starter Kit is perfect for researchers new to RNAi. It provides all of the reagents, protocols, and instructions necessary to get underway with siRNA transfection and ensure su...
... culture or fermentation is the ability to ... make rapid adjustments in response to changes ... provide immediate analysis of key nutrients, metabolites, ... media. BioProfile analyzers are fully automated, multi-test ...
Biology Products: