USA’s Dept of Energy comes up with very cheap solar photovoltaic technology
Photovoltaics from Any Semiconductor Berkeley Lab Technology Could Open Door to More Widespread Solar Energy Devices Lawrence Berkely National Laboratory USA Department of 
Energy JULY 26, 2012 Lynn Yarris (510) 486-5375 lcyarris@lbl.gov
A technology that would enable low-cost, high efficiency solar cells to be made from virtually any semiconductor material has been developed by researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley.
This technology opens the door to the use of plentiful, relatively inexpensive semiconductors, such as the promising metal oxides, sulfides and phosphides, that have been considered unsuitable for solar cells because it is so difficult to
tailor their properties by chemical means….. http://newscenter.lbl.gov/feature-stories/2012/07/26/photovoltaics-from-any-semiconductor/…..http://newscenter.lbl.gov/feature-stories/2012/07/26/photovoltaics-from-any-semiconductor/
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