Potential of organic photovoltaics to cut energy costs to $1/Watt enables technology to be competitive with fossil fuels.
FlexTech Alliance, focused on developing the flexible, printed electronics industry supply chain, recently announced the completion of a multi-year project with Solarmer Energy, Inc. The objective of the project was to develop high performance polymers for organic photovoltaic cells (OPVs). Polymer solar cells offer many advantages over traditional photovoltaic cells such as low-weight, flexible, low-cost fabrication in a variety of sizes. Target applications are widespread and unique including: low-power portable electronics, building-integrated photovoltaics, off-grid power for rural areas, and ultra lightweight power for military applications.
OPVs are expected to produce electricity at 10-20% of the cost of silicon solar cells, making them comparable to fossil fuels. This presents a tremendous opportunity to provide clean energy free from dependence on fossil fuels with zero CO2 emissions. However, the biggest hindrance to achieving the light-to-electricity conversion rate needed to make OPVs practical has been the lack of materials with the requisite properties for a high efficiency device.
To solve these problems, Solarmer Energy, with funding from FlexTech Alliance designed and synthesized new electron donor polymers with smaller band gap, suitable energy levels, and higher carrier mobility—all contributing to higher energy conversion. When the Solarmer project was initiated, the world record for OPV efficiency was ~5%. During the project, the Solarmer team made substantial progress in OPV technology, including successful development of high quality donor polymers enabling several National Renewable Energy Laboratory (NREL) certified world records in OPV efficiencies—from 6.8% to 7.6%, 7.9% and 8.13%. Since the completion of the project, Solarmer has continued to push efficiencies to 8.48%.
“Our progress confirms that OPV technology is on the right course to become a cost effective and competitive technology,” said Woolas Hsieh, president of Solarmer. “Furthermore, our products have the potential to cut the energy production cost down to 12 to 15 cents/kWh and less than $1/W by the 2014 timeframe. Consequently, this could pave the way for mass production and large scale utilization.”
“FlexTech Alliance has been actively involved in identifying technology gaps and developing many of the underlying elements in the photovoltaics supply chain,” said Michael Ciesinski, CEO of FlexTech Alliance. “This project with Solarmer Energy has made significant strides in the commercialization of organic photovoltaics. Solarmer was able to successfully demonstrate benchtop and pilot-line fabrication of high-efficiency OPV modules using technology developed upon the successful completion of this project.”
See the results of the Solarmer Energy project at the 2012 Flexible Electronics and Displays Conference and Exhibition February 6-9, 2012 in Phoenix. Arizona. Go to www.flexconference.org for more details.
The FlexTech Alliance program is a collaborative effort of private industry and the U.S. Army Research Laboratory, located in Adelphi, MD.
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