Brennan Coulter
Jun 25, 2012

Nanoscale Solar Sandwich

North Carolina State University researchers have devised a new nanoscale “sandwich” design technique for thin-film solar cells, creating significantly slimmer cells without sacrificing efficiency. A thin, 70 nm, amorphous silicon active layer, which absorbs solar energy for conversion, is sandwiched between two dielectric layers between 200 to 300 nm thick. The design closely resembles a square wave, with elevated nanosurfaces evenly spaced across the film. The nanostructures are key because they act as “efficient optical antennas [...] focusing solar energy into the active material”, allowing a thinner active layer without impairing the solar cell’s efficiency. Current thin-film solar cells on the market require 300 to 500 nm thick active layers to be as effective as 70 nm nanoscale sandwich cells. The new techniques’ importance is twofold: it can be applied to many other solar cell materials and thinner cells should result in decreased manufacturing costs.
0 Comments
Related Articles
Daniel Porter
May 4, 2012
Nanotech inspired surface makes glass fog-free
MIT mechanical engineers developed a glass that prevents fogging and minimizes glare. A novel process to modify the surface textures... Read More
Daniel Porter
Jun 5, 2012
Solar nanotech company Konarka files for bankruptcy
The loss highlights the current problem with many fields that involve bringing nanotechnology to market: it's easy to raise money... Read More
Ada Genavia
Jun 20, 2012
Solar nanowire flexible absorption
Researchers creating electricity through photovoltaics want to convert as many of the sun’s wavelengths as possible to achieve maximum efficiency.... Read More