期刊
JOULE
卷 3, 期 7, 页码 1734-1745出版社
CELL PRESS
DOI: 10.1016/j.joule.2019.04.012
关键词
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资金
- U.S. Department of Energy [DE-AC36-08GO28308]
- Alliance for Sustainable Energy
- U.S. Department of Energy SunShot Initiative [DE-FOA-0000990]
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy under SunShot Initiative [DE-EE00025810]
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy under Solar Energy Technologies Office [30296]
- Office of Naval Research (ONR) [N000141812155]
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT [NRF-2017R1A4A1015022]
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Solar Energy Technologies Office
Tandem solar cells coupling narrow- and wide-band-gap thin-film polycrystalline absorbers are attractive for achieving ultrahigh efficiency with low manufacturing cost. For established narrow-band-gap CIGS thin-film bottom cells, a challenge is to develop highly efficient polycrystalline wide-band-gap top cells. Here, we demonstrate a 1.68-eV (FA(0.65)MA(0.20)Cs(0.15))Pb(I0.8Br0.2)(3) wide-band-gap perovskite solar cell with an efficiency of similar to 20% enabled by using PEAI and Pb(SCN)(2) complementary additives in the perovskite precursor. The coupling of PEA(+) and SCN- provides a synergistic effect that overcomes growth challenges with either additive individually and improves perovskite film quality with enhanced crystallinity, reduced formation of excess PbI2 (in comparison to using Pb(SCN)(2) additive alone), lower defect density and energetic disorder, and an improved carrier mobility (similar to 47 cm(2)V(-1)s(-1)) and lifetime (similar to 2.9 mu s). When coupling a semi-transparent 1.68-eV perovskite top cell fabricated by this approach with a 1 .1 2-eV CIGS bottom cell, we achieve 25.9%-efficient polycrystalline perovskite/CIGS 4-terminal thin-film tandem solar cells.
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