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