Business Green 
Eco Products for the Office Unplugged: Organic and Affordable Solar Power
Eco Products for the Office Unplugged: Organic and Affordable Solar Power
Unplugged: Organic and Affordable Solar Power
The Millennium Technology Prize trophy, named "Peak," features a silicon tip. Back in 1991, Professor Michael Graetzel from the Lausanne Polytechnic invented what's now called the Graetzel Cell, a non-photovoltaic solar cell made of a layer of titanium dioxide, glass and a dye from fruit that absorbs sunlight like the chlorophyll in green leaves.
