High Efficiency Tandem Thin-Perovskite/Polymer Solar Cells with a Graded Recombination Layer
- 14 March 2016
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 8 (11), 7070-7076
- https://doi.org/10.1021/acsami.5b12740
Abstract
Perovskite-containing tandem solar cells are attracting attention for their potential to achieve high efficiencies. We demonstrate a series connection of a ∼ 90 nm thick perovskite front subcell and a ∼ 100 nm thick polymer:fullerene blend back subcell that benefits from an efficient graded recombination layer containing a zwitterionic fullerene, silver (Ag), and molybdenum trioxide (MoO3). This methodology eliminates the adverse effects of thermal annealing or chemical treatment that occurs during perovskite fabrication on polymer-based front subcells. The record tandem perovskite/polymer solar cell efficiency of 16.0%, with low hysteresis, is 75% greater than that of the corresponding ∼ 90 nm thick perovskite single-junction device and 65% greater than that of the polymer single-junction device. The high efficiency of this hybrid tandem device, achieved using only a ∼ 90 nm thick perovskite layer, provides an opportunity to substantially reduce the lead content in the device, while maintaining the high performance derived from perovskites.Keywords
Funding Information
- National Science Foundation (CHE 1506839)
- U.S. Department of Defense (N00014-15-1-2244)
- U.S. Department of Energy (DE-SC0001087)
- Samsung Scholarship from the Samsung Foundation.
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