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Press reports: Nanotechnology News

World's First Rechargeable Long-Life Solar Cell

31st August 2005

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 system."

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.

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

for details see
Posted by Kuppuswamy Kalyanasundaram on Friday 8 September 2006 at 10:11