期刊
JOURNAL OF APPLIED PHYSICS
卷 115, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4864066
关键词
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-575 SC0006647]
- Engineering Learning Initiative, College of Engineering, Cornell University
We report the detailed balance analysis of the photovoltaic conversion efficiency of nanocrystal solar cells with discrete excitonic absorption profiles. We calculated the conversion efficiency limits of single junction, multiexciton, and tandem solar cells as a function of exciton peak energy and width. We delineate the width of the absorption spectrum in terms of the energetic width of an isolated nanocrystal and the physical width due to the nanocrystal diameter distribution in the ensemble. Our results suggest that the conversion efficiency is less strongly impacted by the ensemble distribution than by the energetic peak width. (c) 2014 AIP Publishing LLC.
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