Subscribe free to our newsletters via your
. Solar Energy News .




SOLAR DAILY
Sticky tape and phosphorus the key to ultrathin solar cells
by Staff Writers
Canberra, Australia (SPX) Jul 21, 2015


This is an interview with Dr Lu and a demonstration of how to make phosphorene. Image courtesy ANU multimedia.

Scientists studying thin layers of phosphorus have found surprising properties that could open the door to ultrathin and ultralight solar cells and LEDs. The team used sticky tape to create single-atom thick layers, termed phosphorene, in the same simple way as the Nobel-prize winning discovery of graphene.

Unlike graphene, phosphorene is a semiconductor, like silicon, which is the basis of current electronics technology.

"Because phosphorene is so thin and light, it creates possibilities for making lots of interesting devices, such as LEDs or solar cells," said lead researcher Dr Yuerui (Larry) Lu, from The Australian National University (ANU). "It shows very promising light emission properties."

The team created phosphorene by repeatedly using sticky tape to peel thinner and thinner layers of crystals from the black crystalline form of phosphorus. As well as creating much thinner and lighter semiconductors than silicon, phosphorene has light emission properties that vary widely with the thickness of the layers, which enables much more flexibility for manufacturing.

"This property has never been reported before in any other material," said Dr Lu, from ANU College of Engineering and Computer Science, whose study is published in the Nature serial journal Light: Science and Applications. "By changing the number of layers we can tightly control the band gap, which determines the material's properties, such as the colour of LED it would make.

"You can see quite clearly under the microscope the different colours of the sample, which tells you how many layers are there," said Dr Lu.

Dr Lu's team found the optical gap for monolayer phosphorene was 1.75 electron volts, corresponding to red light of a wavelength of 700 nanometers. As more layers were added, the optical gap decreased. For instance, for five layers, the optical gap value was 0.8 electron volts, a infrared wavelength of 1550 nanometres. For very thick layers, the value was around 0.3 electron volts, a mid-infrared wavelength of around 3.5 microns.

The behaviour of phosphorene in thin layers is superior to silicon, said Dr Lu.

"Phosphorene's surface states are minimised, unlike silicon, whose surface states are serious and prevent it being used in such a thin state."


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Australian National University
All About Solar Energy at SolarDaily.com






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SOLAR DAILY
CEC Brings Solar Solution to major US Municipal Utility
San Antonio TX (SPX) Jul 15, 2015
Clean Energy Collective (CEC) has announced a new partnership with CPS Energy, bringing the first roofless community solar pilot project to San Antonio, Texas. CEC will develop a 1.2 MW (DC) solar PV facility, providing CPS Energy customers the opportunity to own local clean energy generation through CEC's Roofless Solar program. "We are excited to partner with Clean Energy Collective to b ... read more


SOLAR DAILY
Tropical peatland carbon losses from oil palm plantations may be underestimated

How do biofuel perennials affect the water cycle?

Scientists study ways to integrate biofuels and food crops on farms

Biogas to biomethane by water absorption column at low pressure and temps

SOLAR DAILY
Hitchhiking robot begins journey across U.S.

3-D-printed robot is hard at heart, soft on the outside

Hopping towards a better soft robot

Elon Musk funds major research grants on dangers of artificial intelligence

SOLAR DAILY
Galapagos airport evolves to renewable energy only

Con Edison Development Continues to Build Its Wind Power Portfolio

Amazon to build North Carolina wind farm

Can you actually hear 'inaudible' sound?

SOLAR DAILY
New fuel-cell materials pave the way for practical hydrogen-powered cars

In Mexico City, once beloved 'Beetle' car nearly extinct

China's Uber-style taxi app raises $2 bn

A learning method for energy optimization of the plug-in hybrid electric bus

SOLAR DAILY
Tunneling out of the surface

Distributed technique for power 'scheduling' advances smart grid concept

Superconductor could be realized in a broken Lorenz invariant theory

Single-catalyst water splitter produces clean-burning hydrogen 24/7

SOLAR DAILY
TEPCO to Resume Fukushima Protective Cover Removal in Late July

Russia Will Start Selling Enriched Uranium to Europe

Russian firm dismisses South Africa nuclear build fears

Neutrons find 'missing' magnetism of plutonium

SOLAR DAILY
Tradable Energy Quotas offer fair and effective route to low carbon society

Scientists issue carbon price call to curb climate change

Climate: EU parliament backs reform of carbon market

Fossil fuels, low-carbon plans, in tug-of-war

SOLAR DAILY
Kidnappers free 12 loggers in Senegal's Casamance: army

Timber and construction, a well-matched couple

Rumors of southern pine deaths have been exaggerated

Can pollution help trees fight infection?




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.