Solar Powered Flight History !

Sunseeker I and II have been around a long time. http://inhabitat.com/sunseeker-ii-solar-powered-plane-takes-off/
Before this Paul MacCready has done several succesful designs in the field.
Lately SOLAR IMPULSE has amazed us; http://singularityhub.com/2013/07/14/solar-powered-aircraft-flies-from-sf-to-nyc-under-solar-power-with-a-few-pitstops/

Here is a beautiful history of the solar powered flight !
http://www.asl.ethz.ch/research/asl/skysailor/History_of_Solar_Flight.pdf