[Tyler]

40% efficient solar cells to be used for solar electricity
         

Scientists from Spectrolab, Inc., a subsidiary of Boeing, have recently published their research on the fabrication of solar cells that surpass the 40% efficiency milestone—the highest efficiency achieved for any photovoltaic device. ...
      

http://www.kurzweilai.net/news/frame.html?main=news_single.html?id%3D6869