An advance in solar technology means portable electronic devices such as e-book readers could soon be re-charged on the move in low light levels and partial shading. Scientists from the University of Warwick, in collaboration with spin-out company Molecular Solar, have created an organic solar cell that generates a sufficiently high voltage to recharge a lithium-ion battery directly, without the need to connect multiple individual cells in series. Modules of these high voltage cells perform well in different light conditions including partial shade making them well matched to consumer electronic devices such as e-book readers, cameras and some mobile phones.
Organic photovoltaic (OPV) cells, the so-called 'third generation' of solar technology, offer exciting opportunities thanks to the potential for very cheap manufacture, lightweight, low profile photovoltaics compatible with flexible substrates, which means they are ideally matched to portable electronic device applications.
This new OPV technology is a significant breakthrough as scientists have addressed the problem of low out-put voltage when the module is in low light levels or partial shading taking an important step towards rolling out cheap OPV cells in low-power portable electronics.
The scientists, from the University's Department of Chemistry, have demonstrated a cell with an open circuit voltage of over 7V which delivers maximum power at more than the 4.2V needed to power a standard lithium ion battery.
This is the first time these features have been demonstrated using ultra high voltage OPV cells.
Professor Tim Jones, one of the lead researchers at University of Warwick, along with Dr Ross Hatton and Professor Mike Shipman, said:
"We have taken a big step towards cheap-to-make solar chargers which can top up your devices whenever they are being used – both indoors and out.
"A small light-weight solar charger no bigger than a credit card can be fitted to the battery of an e-book reader for example, and constantly top it up with power while you are reading it - even if you are sitting inside on the sofa.
"Alternatively, this kind of solar cell could be ideal for outdoor use as it is light-weight and portable.
"The next step is to extend this technology outside the laboratory to make cheap OPV chargers available on a commercial scale through Molecular Solar."
The research is detailed in the paper Ultra-high voltage
multijunction organic solar cells for low-power electronic applications and was published in the journal Advanced Energy Materials. http://dx.doi.org/10.1002/aenm.201200560
University of Warwick: http://www.warwick.ac.uk
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
How scientists analyse the spread of extreme bushfires and the weather phenomena they create.
A demand for vulture parts in witchcraft, as well as poisoning and urbanization, has caused a nearly 90 percent decline in the scavengers' populations.
Scientists in Britain say they have developed a way of genetically modifying and controlling an invasive species of moth that causes serious pest damage to cabbages, kale, canola and other similar crops world-wide.
WASHINGTON (Reuters) - They look alike, act alike and long have been considered to be the same species. But, in the case of the golden jackals found across parts of Africa, the Middle East, Asia and Europe, it turns out that appearances can be deceiving.
'Whether we like it or not, over the next 20 years roughly the world will double its hydropower capacity'
These nocturnal storms are different from their daytime brethren and we still don't understand how and why they form.
Monsanto no longer controls one of the biggest innovations in the history of agriculture.
The Department of Justice hasn't said whether they've received an extradition request
Scientists say lake herring, a key fish in Lake Superior's food web, is suffering because of mild winters and Europe's appetite for roe. Some say the species may be at risk of "collapse."
The White House organized this large private-sector commitment