We just reported on the breakthrough in solar dyes in New Zealand. Now, researchers in Italy have discovered that blueberries have natural pigments that absorb sunlight extremely well. Apparently, dark-colored berries outperform most other plant species when it comes to spectral absorption of sunlight. The blueberry pigment, called, anthocyanine, can be used to make dye-sensitized solar cells, which require no silicon to make.
Extraction of the pigment is accomplished through a fairly simple and quick procedure involving chemical purification, according to Professor Di Carlo in the Department of Electronic Engineering at the University of Rome Tor Vergata.