[taxcontrol]

Yes, cells that can operate at high temps would be even a better solution. Unfortunately, almost all of that research, or at least as far as I know, has stopped. The focus of late is to create broad spectrum cells that can use more of the light by creating multi-layer cells, each that operate at a given light frequency.

[eraser2005]

Multi-layer is definitely worth pursuing as well, of course....

That’s been one of the biggest breakthroughs in recent years with digital cameras (see the X3 chip from Foveon, for an example)....