The new solar technology development will enable portable electronic devices such as e-book readers to be re-charged on the move in low light levels and partial shading.
Modules of the 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 offer new opportunities thanks to the potential for cheap manufacture, lightweight, low profile photovoltaics compatible with flexible substrates, which means they are ideally matched to portable electronic device applications.
The new OPV technology is a 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 more than 7 V which delivers maximum power at more than the 4.2 V needed to power a standard lithium ion battery.
The scientists claim it 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