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Abstract

A photovoltaic device has micro-embossed optical enhancing structures formed on an inner surface of a transparent polymer film material which is laminated to the light incident surface of a photovoltaic cell. Preferably, the micro-embossed structures are in the form of an array of holographic pyramid structures which are interconnected by a series of light channels that are also embossed on the inner surface of transparent film material. In another embodiment, the photovoltaic device is comprised of a layer of flexible transparent polymer material, such as polyester, and a layer of flexible base substrate, preferably of a polymer film, between which are disposed at least one layer of amorphous silicon and at least one layer of metalization forming a photovoltaic cell. By utilizing a pair of flexible sheets of polymer material as the outer layers of the photovoltaic device, the device is deformable in at least one orientation other than a plane defining the sheets of polymer film material.

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First Claim