Can we do that here since we don't have tons of black sand?
Here is a little excerpt from another article...http://www.stuff.co.nz/stuff/thepress/4017784a11.html
New solar cells developed by Massey University don't need direct sunlight to operate and use a patented range of dyes that can be impregnated in roofs, window glass and eventually even clothing to produce power.
This means teenagers could one day be wearing jackets that will recharge their equivalents of cellphones, iPods and other battery- driven devices.
Dr Campbell said that unlike silicone-based solar cells, the dye- based cells are still able to operate in low-light conditions, making them ideal for cloudy climates.
They are also more environmentally friendly because they are made from titanium dioxide - an abundant and non-toxic, white mineral available from New Zealand's black sand.