PRESIDENT GEORGE W. BUSH Message Board

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Politics : PRESIDENT GEORGE W. BUSH

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To: J_F_Shepard who wrote (269003)	7/1/2002 10:08:45 PM
From: Thomas A Watson	Read Replies (1) of 769667

Well j-f, when you got the beach do you plug your electronic gear into the sand. Well that's SI02. But SI is an element and SI cells are semiconductors. Pure SI is an insulator and not a solar cell. Semiconductor are created by doping SI with P or N materials. This cause a surplus or deficit of electrons. SI solar cell are not very efficient. More efficient solar cells. Gallium Arsenide cells are the most efficient at 25%-30% and have a high resistance to heat What's a little gallium and arsenic and old lace among friends. There are also cadmium telluride, and copper indium diselenide CIS Cadmium is such nice stuff. CIS has the highest absorption amount at around 90% of the solar spectrum Hydrogen selenide used to make CIS is extremely toxic Any more questions J-F.

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