MIT Develops Ultra Thin, Light Weight, Efficient Solar Cells (blastingnews.com)
MarkWhittington writes: Researchers at MIT have developed a gossamer thin solar cell that is made of layers of flexible polymers. The cell is so light that it can rest on a soap bubble without breaking it. As a bonus, the thin, light cells puts out 400 times more power than the standard, glass covered photovoltaic cells, at about six watts per gram. According to the researchers, this new development could help power the next generation of portable electronic devices.
https://en.wikipedia.org/wiki/Operation_Plumbbob#Propulsion_of_steel_plate_cap