CdTe Solar Cells
40-MW CdTe Photovoltaic Array, Germany, costs $4.2/watt
http://en.wikipedia.org/wiki/Cadmium_Telluride_Photovoltaics
p-type CdTe (E
g
= 850 nm) and n-type CdS
First Solar Quest for the $1/Watt Solar Cell
http://www.spectrum.ieee.org/aug08/6464/
