SEMITRANSPARENT PHOTOCONVERSION DEVICE
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Apr 30, 2014
filing date -
Apr 30, 2013
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Abstract
The main object of the present invention is to provide a semitransparent photo conversion device that enhances harvesting of visible sunlight. For this purpose, a semitransparent photovoltaic cell is provided with a multilayer structure that can be used to change the color hue appearance of the cell while guaranteeing a minimum change in the light absorption capability. The photo conversion device has a direct or inverted architecture that comprises a first light transmissive electrical contact overlaying a transparent substrate, a charge blocking layer overlying the first light transmissive electrical contact and underlying the active organic photosensitive material, a second charge blocking layer overlying the active organic photosensitive material, a second light transmissive electrical contact overlying the second charge blocking layer, and a multilayer structure overlying the second light transmissive electrical contact. The multilayer structure is composed of two or more layers of light non-absorbing dielectric materials and two adjacent layers in the multilayer structure always have different refractive indexes.
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