Solar: from Si to GaAs

[TeaLeaf]

http://arstechnica.com/science/2014/02/is-it-time-to-move-away-from-silicon-based-solar

Nice article on the stagnation of solar tech on silicon and the alternatives that might provide big improvements in solar efficiency. Gallium arsenide is apparently a front runner and has already shown big improvements in efficiency over silicon, now it's waiting to be commercialised.