期刊
RSC ADVANCES
卷 6, 期 71, 页码 66911-66923出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra07553c
关键词
-
资金
- Department of Energy [DE-EE0006707]
- National Research Foundation Singapore through the Singapore MIT Alliance for Research and Technology's Low Energy Electronic Systems research program
Tandem solar cells offer the potential of conversion efficiencies exceeding those of single-junction solar cells, but also incur higher fabrication costs. The question arises under which conditions a tandem solar cell becomes economically preferable to both of the single-junction sub-cells it comprises. We present an analysis based on cost and efficiency relations to answer this question for a double-junction tandem solar cell. We find that combining two ideally band-gap-matched single-junction solar cell technologies into a tandem should be a marriage of equals: the sub cells should be produced at similar $ per W costs, both sub cells should have similar efficiencies when operated independently, and the costs to turn both cells into a system should be similar. We discuss examples of different hypothetical and actual tandem solar cell technologies and show the intricacies of imbalances in the mentioned factors. We find that tandem-solar-cell-based PV power stations for existing solar-cell technologies offer the potential to reduce the levelized cost of electricity (LCOE), provided suitable top cells are developed.
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