Multilayer photovoltaic cell

Details Multilayer photovoltaic cell Multilayer photovoltaic cell

H - Electricity

01

L

345/22

H01L 31/04 (2006.01)

Patent

CA 1148640

ABSTRACT OF THE DISCLOSURE "MULTILAYER PHOTOVOLTAIC CELL" A new high efficiency, multijunction photovoltaic solar cell for use with a concentrating lens. This cell comprises an elemental single crystal substrate without an internal light sensitive junction, upon which are two or more successive homog- enous layers of semiconductor material, each layer containing within it a light sensitive p/n junction of a similar polarity, each layer having essentially the same lattice constant as the single crystal substrate, each layer having a shorting junction contact with the layer immediately above and below it, each successive layer adsorbing light energy at a shorter wavelength, and each layer being of sufficient thickness and appropriate composition to develop essentially the same current as the other layers. The outer surfaces of the top layer and the substrate are provided with electrical contacts for distribution of the electricurrent. The top contact comprises a layer of transparent conductive material with electrical connections and the whole structure is completed with and antireflection coating over the top.

396438

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