NANOWIRE- BASED SOLAR CELL STRUCTURE
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United States of America Patent
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app pub date -
Jun 19, 2008
filing date -
Jun 19, 2007
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Abstract
The solar cell structure according to the present invention comprises a nanowire (205) that constitutes the light absorbing part of the solar cell structure and a passivating shell (209) that encloses at least a portion of the nanowire (205). In a first aspect of the invention, the passivating shell (209) of comprises a light guiding shell (210), which preferably has a high- and indirect bandgap to provide light guiding properties. In a second aspect of the invention, the solar cell structure comprises a plurality of nanowires which are positioned with a maximum spacing between adjacent nanowires which is shorter than the wavelength of the light which the solar cell structure is intended to absorbin order to provide an effective medium for light absorption. Thanks to the invention it is possible to provide high efficiency solar cell structures.
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