"Zoltan Szakaly" wrote in message
om...

You guys can more efficiently transmit energy using microwave
antennas. You can get 60% efficiency by radiating microwaves onto an
antenna that is equipped with microwave diodes. This would be the
preferred method of transmitting power.
Japanese have done most of the latest research work in WPT, and IIRC they
have achieved efficiencies in excess of 80%.
( sites to check:
http://global.mitsubishielectric.com...r/sol01_b.html and
http://www.wronkiewicz.net/ssp/)

But, wrt solar cells, check out this
http://www.spacedaily.com/news/solarcell-02m.html
"An Unexpected Discovery Could Yield A Full Spectrum Solar Cell"
"The serendipitous discovery means that a single system of alloys
incorporating indium, gallium, and nitrogen can convert virtually the full
spectrum of sunlight -- from the near infrared to the far ultraviolet -- to
electrical current."
"great many layers with only small differences in their band gaps could be
stacked to approach the maximum theoretical efficiency of better than 70
percent."

-kert