Saturday, 24 Sep 2016

Heliatek announces new world record efficiency of 10.7% for tandem cell small molecule organic photovoltaic devices

These opv devices show a 15% higher efficiency at low light level extending their effectiveness across the day, and making them suitable for indoor applications

23 Apr 2012 | editor

Heliatek commissioned SGS, an accredited and independent test house to undertake a measurement campaign of its latest organic photovoltaic (OPV) cells. The result of this campaign has enabled Heliatek to announce a new world record for OPV with 10.7% cell efficiency on 1.1 cm2.

The measurement campaign of SGS included efficiency measurements under standard testing conditions (STC) of the solar industry as well as performance measurements at low light and high temperatures of up to 80°C.

Further measurements highlight the performance of Heliatek’s OPV cells under real life conditions:-

Efficiency at low light efficiency increases:

  • at an irradiation of 100 W/m2 the efficiency is 15% higher compared to the standard efficiency measured at 1,000 W/m2

Efficiency at high temperature remains constant:

  • this behaviour is unique for OPV technology in contrast to traditional solar technology which efficiency drops 15% to 20% at elevated temperatures

These technology advantages translate into a higher harvesting factor under real life conditions.

  • First outdoor tests have shown that the harvesting factor of Heliatek’s organic solar cells is 15% to 25% higher than crystalline and thin film solar

Heliatek is currently working on its first roll-to-roll manufacturing line installed in Dresden, Germany, to go in production in the third quarter of 2012. It has recently begun a third financing round to raise €60 million from current and new investors for a new roll-to-roll 75 MWp production line.

According to Heliatek the key to the company’s success is the family of small organic molecules – oligomers - developed and synthesised at its own lab in Ulm, Germany.

Dr. Martin Pfeiffer, co-founder and CTO of Heliatek, said, “Heliatek is the only solar company in the world that uses the deposition of small organic molecules in a low temperature, roll-to-roll vacuum process. Our solar tandem cells are made of nanometers thin layers of high purity and uniformity. This enables us to literally engineer the cell architecture to systematically improve efficiency and lifetime.”

Thibaud Le Séguillon, CEO of Heliatek, said, “When Heliatek was founded in 2006, the technology roadmap set out ambitious milestones for efficiency, and yet we have hit every single one of them.” Thibaud added, “Thanks to the close cooperation between our research teams in chemistry and physics, we are now on our path to achieving 15 % efficiency within the next few years.”

www.heliatek.com www.sgs.com

About Heliatek:

Heliatek was spun-off in 2006 from the Technical University of Dresden (IAPP) and the University of Ulm. The company is the global technology leader in the field of flexible organic photovoltaics (OPV) based on small molecules. Heliatek maintains a total staff of some 75 specialists at its facilities in Dresden and Ulm. Investors in Heliatek include leading industrial and financial companies such as BASF, Bosch, RWE, and Wellington Partners. Research and development work, as well as the installation of production technology, has been funded by the Free State of Saxony, the BMBF (Federal Ministry for Education & Research), the BMWi (Federal Ministry of Economics and Technology), and the European Union.

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