Heliatek Reaches Efficiency Record With 40% Transparent Organic Solar Cells

The company already holds the world record of 12% cell efficiency for opaque (non-transparent) organic solar cells.

DRESDEN, Germany, March 24, 2014


Ideal for generating energy from windows, faades and glass car roofs

Heliatek GmbH, world-leading company in the production of organic solar film, has reached a new record in the efficiency of transparent solar cells. The latest development allows transparency levels up to 40% with an efficiency of over 7%. The company already holds the world record of 12% cell efficiency for opaque (non-transparent) organic solar cells.

This lab development underscores the company's strategy to supply its transparent HeliaFilm™ to glass manufacturers for both building integration (BIPV) and car roofs. "The transparency of our products is at the core of our market approach. Our HeliaFilm™ is customized to meet our partners' specific needs," added Thibaud Le Sguillon, Heliatek CEO. "We are a component supplier and this component is a film which can combine transparency and energy generation. This unique combination widens our market potential."

Both these application areas use tinted glass to reduce glare which can be done by applying a film, so changing the film to one that generates electricity as well is a drop-in for manufacturers. Using HeliaFilm™ in glass car roofs will not only generate energy, but will also allow the car manufacturers to claim Eco-innovation credits towards CO2 emission goals. Architectural glass panels and windows incorporating HeliaFilm™ enable electricity to be discretely generated on the outside envelope of a building.

The latest generation of organic solar cells with a 40% light transparency reaches an efficiency record of 7.2%. The measurement follows standard testing conditions using a white background. Heliatek thus succeeded in generating an optimal energy conversion for transparent HeliaFilm™. Currently, its opaque cells achieve 12% efficiency. 7.2% cells mirror the same efficiency, since the partial transparency allows the usage of only 60% of the light for the energy harvesting. Depending on the application, the balance between light let through and electricity generated can be adjusted. The production of transparent HeliaFilm™ is possible with the introduction of transparent conductive layers at the front- and back-side of the solar cells.

The production of HeliaFilm™ is based on small molecules (oligomers). Oligomers are deposited at low temperatures in a roll-to-roll vacuum process. Their selective absorption of the solar spectrum targets different colors and transparency to convert sunlight into electricity.

For further information http://www.heliatek.com

Featured Product

sonnenBatterie eco

sonnenBatterie eco

Sonnen's mission is to provide clean and affordable energy for all. As the first mainstream grid tied residential energy storage company in the world and with 24,000 sonnenBatterie systems installed worldwide, sonnen is a proven global leader in intelligent energy management solutions. The all-in-one sonnenBatterie smart energy storage solution easily integrates with new and existing solar installations to help homes manage their energy throughout the day-saving money, providing backup power, and maximizing the effective use of solar power day and night. Sonnen has won several awards for its energy innovations, including the 2017 Zayed Future Energy Prize, MIT's Technology Review's 50 Smartest Companies in 2016, Global Cleantech 100 for 2015-2017, Greentech Media's 2016 Grid Edge Award for Innovation, and Cleantech's 2015 Company of the Year Award in both Israel and Europe.