Press Release


NREL Presents Successful Use of Invisicon®

FRANKLIN, MA (June 10, 2009) - National Renewable Energy Laboratory (NREL) Presents Successful Use of Invisicon® Coating on CdTe Solar Cells.

34th IEEE Photovoltaic Specialists Conference, Philadelphia, PA – The National Renewable Energy Laboratory (NREL) presented the successful use of Eikos Invisicon® transparent carbon nanotube coating on a new CdTe solar cell architecture to give a nearly 12% efficiency.

Based on single-wall carbon nanotube (SWCNT) networks Invisicon® coatings form a highly transparent and electrically conductive thin film that can be used to replace traditional transparent conducting oxides (TCOs) in a variety of applications. Here, NREL demonstrate their use as a transparent back contact in a near-infrared (NIR) transparent CdTe solar cell. SWCNT networks are hole-selective conductors and have a significantly greater NIR transparency than TCOs—qualities which make them very useful in tandem thin-film solar cells.  SWCNT networks can be incorporated into single-junction CdTe devices and in CdTe top cells for mechanically stacked thin-film tandem devices.

“We are pleased with the positive results on CdTe since this is the fastest growing solar PV technology,” explains Joe Piche, CEO of Eikos.  “We look forward to our continued relationship with NREL and the important role Invisicon® will play in expanding the use of renewable energy.”

About Eikos
Eikos, Inc. is a developer and manufacturer of highly transparent carbon nanotube inks for conductive coatings and circuits for use in solar cells, flat panel displays, OLED lighting, smart windows and other established markets.   Eikos’ patented Invisicon®  transparent conductors (‘nanowires’) will enable high volume, low cost production of a thinner, more flexible and more durable conductive coating technology that will displace Indium Tin Oxide (ITO), Zinc Oxide, PEDOT/PSS, and other transparent conductors.  A privately held company headquartered in Franklin Massachusetts, Eikos has a number of licenses and development contracts with major global companies, U.S. military agencies and NASA.   For more information, please visit us at

Joe Piché
Eikos, Inc.
508-528-0300 (phone)