Solaris Nanosciences Demonstrates the World's First Rechargeable Long-Life Solar Cell

Aug 30, 2005, 01:00 ET from Solaris Nanosciences

    PROVIDENCE, R.I., Aug. 30 /PRNewswire/ -- Solaris Nanosciences has
 demonstrated a completely rechargeable dye sensitized solar cell (DSSC or
 Graetzel Cell) creating the lowest manufacturing cost, long-life photovoltaic
 system in the world.  DSSCs which are based on low cost materials and simple
 construction, have to date suffered from limited operating lifetimes due to
 the degradation of the sensitizer dyes.
     Solaris' nontoxic chemical process allows the degraded dye in already
 installed DSSCs to be removed and replaced with new dye, restoring the
 performance of the original solar cell.  "This low cost process, which can be
 performed by the existing base of heating and air conditioning businesses,
 requires less than thirty minutes and takes the operating life of these
 photovoltaics (PV) beyond that of silicon to over 30 years," said Nabil M.
 Lawandy, CEO of Solaris Nanosciences.  Lawandy also stated, "Not only can we
 replace the original dye, but we have shown that newer, more efficient dyes,
 resulting from ongoing efforts worldwide, can be used in recharging.  This
 effectively allows for efficiency upgrades over the life of the installed
     The recharging process and its performance were independently confirmed at
 the Swiss Federal Institute of Technology Lausanne where DSSCs were invented
 by Professor Michael Graetzel.  "Our evaluation has shown without any doubt
 that the cell performance after three coloration cycles remained intact and
 could even be pushed beyond the initial cell output..." said Professor
 Graetzel, whose group performed the study.  Professor Graetzel also said "The
 procedure developed by Solaris Nanosciences is the first to accomplish a rapid
 and complete replenishment of the sensitizer and electrolyte.  This has
 important implications for the long-life applications of the dye sensitized
 solar cells.  This solution provides an elegant way to maintain for a very
 long time the conductive glass shell structure of the cell serving as current
 collector.  This is the part of the DSSC that is most expensive and has the
 largest energy content.  Thus, the new Solaris Nanosciences process saves
 costs and energy, avoiding the waste of materials and the recycling problem
 that other competing PV technologies must face."
     "Professor Graetzel's confirmation of our process is an important
 validation, both for the Company and the entire PV community.  Solaris has
 effectively created the solar cell analogue of the rechargeable lithium-ion
 battery developed by Sony, forever transforming that industry," said Lawandy.
     Solaris plans to develop a large scale prototype of its rechargeable solar
 cell for testing at the National Renewable Energy Laboratory (NREL) and with
 corporate partners to explore the distribution of this new PV technology
 through the building and construction industry.
     Solaris is pursuing the commercialization of its rechargeable solar cells
 as well as engineered nano-antenna materials to provide unique benefits to
 several large industry sectors.  Solaris Nanosciences is applying its
 nanotechnology processes and materials patent portfolio to become a leading
 manufacturer and licensor of nano-materials and technology for photovoltaics
 and other applications.
     In addition to the primary focus on photovoltaics, the company is
 developing additional products for displays and vision enhancement through
 corporate and institutional partnerships.  For additional information on
 Solaris Nanosciences and its technologies, visit

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