Journal
NANOTECHNOLOGY
Volume 22, Issue 14, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/22/14/145304
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Funding
- National Science Foundation [NSF-NIRT-ECS-0609064]
- NSF-EPSCoR [EPS-0447479]
- Kentucky Science and Engineering Foundation [KSEF-148-502-02-27, KSEF-148-502-03-68]
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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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