At last: Non-toxic and cheap thin-film solar cells for ‘zero-energy’ buildings

‘Zero-energy’ buildings — which generate as much power as they consume — are now much closer after engineers have achieved the world’s highest efficiency using flexible solar cells that are non-toxic and cheap to make.

Read more here:: http://feeds.sciencedaily.com/~r/sciencedaily/matter_energy/solar_energy/~3/8HpH6XMJcGg/160428103023.htm