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 has great potential to be an important component in the kind of solar cells we hope to see incorporated into building exteriors and other materials in the future," said Arthur Hebard, distinguished professor of physics at UF and co-author on the paper. "Showing that its power-converting capabilities can be enhanced by such a simple, inexpensive treatment bodes well for its future."

The researchers said that if graphene solar cells reach 10 percent power conversion efficiency they could be a contender in the market place, if production costs are kept low enough.

The prototype solar cell created in the UF lab was built on a rigid base of silicon, which is not considered an economical material for mass production. But Hebard said that he sees real possibilities for combining the use of doped graphene with less expensive, more flexible substrates like the polymer sheets currently under development in research laboratories around the world.


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

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:5/18/2017)... ... May 18, 2017 , ... Lajollacooks4u ... Cooking Challenge is a two-hour team-building package designed for groups of 10-30 people. ... Jodi Abel, which include items, such as Blackened Shrimp with Edamame Salad, Pizza ...
(Date:5/18/2017)... (PRWEB) , ... May 17, 2017 , ... NDA Partners ... executive and former CEO of Eurofins Advantar Laboratories and President of Pharmaceutical Development Business ... to his position at Eurofins and Cardinal Health, he was former Chief Operating Officer ...
(Date:5/18/2017)... ... May 17, 2017 , ... Cognition Corporation ... commercialization, has just released version 9.0 of the Cognition Cockpit platform. , “Our ... Cockpit,” says David Cronin, CEO of Cognition. “We’re thrilled to finally be able ...
(Date:5/18/2017)... , ... May 17, 2017 , ... ... equipment for varying industries, including food and dairy, munitions, and pharmaceutical/biotech, recently introduced ... safety and ease of use. The improvement in technology comes on the heels ...
Breaking Biology Technology:
(Date:4/24/2017)... 2017 Janice Kephart , former ... Strategy Partners, LLP (IdSP) , today issues the ... Trump,s March 6, 2017 Executive Order: Protecting ... can be instilled with greater confidence, enabling the ... refugee applications are suspended by until at least ...
(Date:4/13/2017)... April 13, 2017 According to a new market ... Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, Deployment Mode, Vertical, ... Market is expected to grow from USD 14.30 Billion in 2017 to ... of 17.3%. ... MarketsandMarkets Logo ...
(Date:4/6/2017)... 2017 Forecasts by Product Type ... by End-Use (Transportation & Logistics, Government & Public Sector, ... Fossil Generation Facility, Nuclear Power), Industrial, Retail, Business Organisation ... Are you looking for a definitive report on the ... ...
Breaking Biology News(10 mins):