Bimolecular Additives Improve Wide-Band-Gap Perovskites for Efficient Tandem Solar Cells with CIGS
| Autor: | Bryon W. Larson, Stephen Glynn, Christopher P. Muzzillo, Yanfa Yan, Dong Hoe Kim, Haipeng Lu, Chungseok Choi, Jinhui Tong, James B. Whitaker, Yu Huang, Steven P. Harvey, Zhen Li, Maikel F.A.M. van Hest, Lorelle M. Mansfield, Axel F. Palmstrom, Joseph J. Berry, Kai Zhu, Fei Zhang |
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| Rok vydání: | 2019 |
| Předmět: |
Electron mobility
Materials science Tandem business.industry Wide-bandgap semiconductor Perovskite solar cell 02 engineering and technology Carrier lifetime 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper indium gallium selenide solar cells 0104 chemical sciences Crystallinity General Energy Optoelectronics 0210 nano-technology business Perovskite (structure) |
| Zdroj: | Joule. 3:1734-1745 |
| ISSN: | 2542-4351 |
| Popis: | Summary 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 (FA0.65MA0.20Cs0.15)Pb(I0.8Br0.2)3 wide-band-gap perovskite solar cell with an efficiency of ∼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 (∼47 cm2 V−1s−1) and lifetime (∼2.9 μs). When coupling a semi-transparent 1.68-eV perovskite top cell fabricated by this approach with a 1.12-eV CIGS bottom cell, we achieve 25.9%-efficient polycrystalline perovskite/CIGS 4-terminal thin-film tandem solar cells. |
| Databáze: | OpenAIRE |
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