Researchers Say Solid State Solar Panels are Cheaper, Don't Leak
With that in mind, researchers from Northwestern University developed a new material for the electrolyte that starts off as a liquid but turns into a solid mass. They claim these solid-state solar cells are much more stable, whereas conventional cells typically last no more than 18 months.
"The Grätzel cell is like having the concept for the light bulb but not having the tungsten wire or carbon material," said Kanatzidis. "We created a robust novel material that makes the Grätzel cell concept work better. Our material is solid, not liquid, so it should not leak or corrode."
Today's dye-sensitized solar cells typically don't last more than 18 months, researchers from Northwestern University say.
The new solar cell uses both n-type and p-type semiconductors along with a monolayer dye molecule that serves as a junction between the two, the researchers explain.
"Our inexpensive solar cell uses nanotechnology to the hilt," said Robert P. H. Chang, a nanotechnology expert. "We have millions and millions of nanoparticles, which gives us a huge effective surface area, and we coat all the particles with light-absorbing dye."
Each solar cell measures a scant half-centimeter by half-centimeter and is about 10 microns thick. Dye-coated nanoparticles are packed, followed by the new material, which is poured in as a liquid and turns into a solid after the solvent evaporates.