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Nanotechnology. 2011 Apr 8;22(14):145304. doi: 10.1088/0957-4484/22/14/145304. Epub 2011 Feb 24.

Cadmium sulfide nanowires for the window semiconductor layer in thin film CdS-CdTe solar cells.

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  • 1Center for Nanoscale Science and Engineering (CeNSE), Department of Electrical and Computer Engineering, University of Kentucky, Lexington, KY 40506, USA.


Thin film CdS/CdTe heterojunction device is a leading technology for the solar cells of the next generation. We report on two novel device configurations for these cells where the traditional CdS window layer is replaced by nanowires (NW) of CdS, embedded in an aluminum oxide matrix or free-standing. An estimated 26.8% improvement in power conversion efficiency over the traditional device structure is expected, primarily because of the enhanced spectral transmission of sunlight through the NW-CdS layer and a reduction in the junction area/optical area ratio. In initial experiments, nanostructured devices of the two designs were fabricated and a power conversion efficiency value of 6.5% was achieved.

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