Researchers develop paint-on solar cells
29 Dec 2011
![This paste of cadmium sulfide-coated titanium dioxide nanoparticles could turn large surfaces into solar cells. (Photo Credit: ACS Nano)](/technology/materials/images\solar_paint_domain-b.jpg)
''We want to do something transformative, to move beyond current silicon-based solar technology,'' says Prashant Kamat, John A Zahm Professor of Science in Chemistry and Biochemistry and an investigator in Notre Dame's Center for Nano Science and Technology (NDnano), who leads the research.
''By incorporating power-producing nanoparticles, called quantum dots, into a spreadable compound, we've made a one-coat solar paint that can be applied to any conductive surface without special equipment.''
The team's search for the new material, described in the journal `ACS Nano,' centered on nano-sized particles of titanium dioxide, which were coated with either cadmium sulfide or cadmium selenide. The particles were then suspended in a water-alcohol mixture to create a paste.
When the paste was brushed onto a transparent conducting material and exposed to light, it created electricity.
![Prashant Kamat](/technology/materials/images\pkamat_domain-b.jpg)
''But this paint can be made cheaply and in large quantities. If we can improve the efficiency somewhat, we may be able to make a real difference in meeting energy needs in the future.''
''That's why we've christened the new paint, Sun-Believable,'' he adds.
Kamat and his team also plan to study ways to improve the stability of the new material.
NDnano is one of the leading nanotechnology centers in the world. Its mission is to study and manipulate the properties of materials and devices, as well as their interfaces with living systems, at the nano-scale.
This research was funded by the Department of Energy's Office of Basic Energy Sciences.