Mounting for solar cell

DETAILED DESCRIPTION What is claimed is: 1.
A solar cell construction comprising: a wafer of semiconductor photosensitive material including a base region of one conductivity type and an emitter region of opposite conductivity type, said wafer having a coefficient of thermal expansion of a first value, an electrode grid structure in electrical contact with said emitter region for conducting charge carriers from said emitter region to an edge of said wafer, a first electrically conductive electrode in ohmic and thermal conductive contact with said base region over an area of about the same extent as said base region and having a coefficient of thermal expansion close in value to said first value, a second electrically conductive electrode in ohmic and thermal conductive contact with said grid structure at said edge of said wafer and having a coefficient of thermal expansion close in value to said first value, an electrical conductor in ohmic and thermal conductive contact with said second electrode and having a coefficient of thermal expansion substantially different than said first value, and a block of electrically conductive heat sink material in ohmic and thermal conductive contact with said first electrode over said area for cooling said wafer and said electrodes, said block having a coefficient of thermal expansion substantially different than said first value.
2.
The construction of claim 1 further including mounting means attached to said block.
3.
The construction of claim 1 wherein said first and second electrodes are the same refractory metals.
4.
The construction of claim 3 wherein said first electrode is a sheet of molybdenum and said second electrode is a molybdenum wire.
5.
The construction of claim 1 wherein said wafer, electrodes, conductor and block of material are joined by lead-tin solder.
6.
The construction of claim 1 wherein said wafer has a geometrically shaped periphery, said grid structure terminating at spaced locations along said periphery, said second electrode having said geometrical shape and extending along said periphery