Inexpensive solar cells

Earth receives more solar energy in one hour than the entire planet currently consumes in a year.

With new technology close to the green plant's photosynthesis it's now possible to make solar cells less expensive.

Based on the principle of photosynthesis -- the biochemical process by which plants convert light energy into carbohydrate (sugar, their food) -- the Graetzel solar cell is composed of a porous layer of nanoparticles of a white pigment, titanium dioxide, covered with a molecular dye that absorbs sunlight, like the chlorophyll in green leaves. The pigment-coated titanium dioxide is immersed in an electrolyte solution, and a platinum based catalyst completes the package.

From Science Daily 12 th of April; Inexpensive Highly Efficient Solar Cells Possible

[tip from technology-will-save-the-world Jimmy, who might be right in this case]