Power Chipsâ„¢ "Thermo-cell"
Converting heat radiation into electricity, with 70% efficiency and being inexpensive to make
" A single chip, capable of 100 watts of output, will measure less than 1 cm on a side, and be only a few millimeters thick."
http://www.powerchips.gi/
http://peswiki.com/index.php/Directory:Power_Chips_PLC