Korean researchers announce flexible CIGS solar cell with 20.4% efficiency

Share

From pv magazine International

Scientists at the Korea Institute of Energy Research (KIER) have developed a flexible copper, indium, gallium, selenium (CIGS) solar cell for BIPV applications which they say is “ultralight and ultrathin.”

The KIER reported a 20.4% efficiency for the device, although it did not say if the result was confirmed by a third party. This record, the researchers specified, is approaching the world record of 20.8% set for this type of cell by a device manufactured by the Swiss Federal Laboratories for Materials Science and Technology (EMPA) in July last year.

The thin-film cell is based on a flexible plastic substrate for which a conventional CIGS deposition process at around 550 degrees Celsius could not be used. The researchers claim to have used a new low-temperature film formation technology, which has not affected the device’s performance, as usually happens when CIGS cells are grown at a temperature lower than 550 degrees.

Furthermore, the researchers applied alkali-fluorides such as sodium-fluoride and potassium-fluoride to the CIGS absorber layers through an external alkali incorporation technology.

Doping with alkali elements is crucial for achieving high efficiencies in CIGS cells. Although the reason for this increased efficiency has been investigated by many scientists, and various explanations have been given, there is no still no clear definition of their effects in terms of stronger performance.

“This achievement is evaluated as the establishment of a standard process for high efficiency of ultra-light flexible CIGS thin film solar cells,” said the research coordinator, Kihwan Kim. Further details on the cell technology were not provided.

The scientists added they will further investigate how this new process may be used to produce large-area CIGS thin-film solar cells at volume.

This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.

Share

Related content

Elsewhere on pv magazine...

Leave a Reply

Please be mindful of our community standards.

Your email address will not be published. Required fields are marked *

By submitting this form you agree to pv magazine using your data for the purposes of publishing your comment.

Your personal data will only be disclosed or otherwise transmitted to third parties for the purposes of spam filtering or if this is necessary for technical maintenance of the website. Any other transfer to third parties will not take place unless this is justified on the basis of applicable data protection regulations or if pv magazine is legally obliged to do so.

You may revoke this consent at any time with effect for the future, in which case your personal data will be deleted immediately. Otherwise, your data will be deleted if pv magazine has processed your request or the purpose of data storage is fulfilled.

Further information on data privacy can be found in our Data Protection Policy.

This website uses cookies to anonymously count visitor numbers. To find out more, please see our Data Protection Policy.

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close