US Dept. of Energy timeline of solar energy (pdf)
Village scale energy: One of the most significant historical questions involves the way we see the problem of scale. Smaller decentralized systems may prove more able to provide lighting and energy for the majority of the people in the world.
Village scale photovoltaic lighting (video above)
Story of Solar Energy by Avind Gupta; also see this TED video about science education with Gupta: