NanoSolar has long been a favorite of mine for their commitment to producing inexpensive solar cells with more durable materials than traditional solar cells. They have funding from some of the biggest names in the business world, which probably explains why they haven’t had to go public yet. When they do, I’m going to be standing in line (probably a long one!) to get stock. Their PowerSheet technology, printed in a process similar to running a newspaper press, recently snagged Best of 2007 honors in Popular Science’s annual contest (see a nice Flash demonstration of the technology at the link above).
The most exciting news is that the NanoSolar process has been officially declared cheaper then coal. That means there’s no excuse not to own some of these panels once they come off the production line in 2008. The first commercially produced line of panels were auctioned off, sent to the Smithsonian, used in power plant settings, and other socialy important applications. But NanoSolar for the masses appears to be just around the corner. Keep an eye on this!