Thin film photovoltaic solar cell and method of making the same

Details Thin film photovoltaic solar cell and method of making the same Thin film photovoltaic solar cell and method of making the same

H - Electricity

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345/22

H01L 31/04 (2006.01) H01L 31/052 (2006.01) H01L 31/18 (2006.01)

Patent

CA 1243389

A THIN FILM PHOTOVOLTAIC SOLAR CELL AND METHOD OF MAKING THE SAME Abstract A thin film photovoltaic solar cell having an opaque electrical contact which consists of a low-cost substrate, such as a metal alloy or a metallurgical grade crystalline silicon and a barrier layer which is optically reflective, a first semiconductor layer, a second semi- conductor layer, a transparent electrical contact and an encapsulant. Solar cell quality semiconductors are grown using a constant temperature sliding boat liquid phase process in a continuous or semi-continuous mode. The growth is driven by applying a temperature gradient or other gradient across the melt, with the substrate at a cooler temperature, after thermal equilibrium is obtained between the solution and the substrate. Growth occurs from the bottom of the solution to prevent contamination of the growth layers by extraneous particles in the solution.

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