TANDEM ORGANIC-INORGANIC PHOTOVOLTAIC DEVICES
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United States of America Patent
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Jan 28, 2016
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Jan 28, 2015
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Abstract
A tandem photovoltaic cell includes a substrate, a first electrode formed on the substrate, and a first sub-cell comprising a first light absorption material and formed on the first electrode. The tandem photovoltaic cell further includes an inter-cell layer formed on the first sub-cell, a second sub-cell comprising a second light absorption material and formed on the inter-cell layer, and a second electrode formed on the second sub-cell. The second electrode is at least partially transparent to light of a spectral range that can be absorbed by the first and second absorption materials. The inter-cell layer provides electrical connection between the first and second sub-cells and is at least partially transparent to light of at least a portion of the spectral range, and the second sub-cell has a refractive index to light within the spectral range that is less than a refractive index of the first sub-cell.
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