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All-perovskite tandem solar cells with 3D/3D bilayer perovskite heterojunction - Nature
Abstract .
All-perovskite tandem solar cells promise higher power-conversion efficiency (PCE) than single-junction perovskite solar cells while maintaining a low fabrication cost 1–3 . However, their performance is still largely constrained by the subpar performance of mixed Pb-Sn narrow-bandgap perovskite subcells, mainly due to a high trap density on the perovskite film surface 4–6 . Although heterojunctions with intermixed 2D/3D perovskites could reduce surface recombination, this common strategy induces transport losses and thereby limits device fill factors 7–9 . Here we develop an immiscible 3D/3D bilayer perovskite heterojunction with type-II band structure at the Pb-Sn perovskite/electron-transport layer interface to suppress the interfacial non-radiative recombination and facilitate charge extraction. The bilayer perovskite heterojunction is formed by depositing a layer of lead-halide wide-bandgap perovskite on top of the mixed Pb-Sn narrow-bandgap perovskite via a hybrid evaporation/solution processing method. This heterostructure allows us to increase the PCE of Pb-Sn perovskite solar cells having a 1.2-?m-thick absorber to 23.8%, together with a high open-circuit voltage ( V oc ) of 0.873 V and a high fill factor of 82.6%. We thereby demonstrate a record-high PCE of 28.5% (certified 28.0%) in all-perovskite tandem solar cell. The encapsulated tandem devices retain over 90% of their initial performance after 600 hours of continuous operation under simulated one-sun illumination.
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Author notes These authors contributed equally: Renxing Lin, Yurui Wang, Qianwen Lu
Authors and Affiliations .
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing, China
Renxing Lin,?Yurui Wang,?Qianwen Lu,?Jiayi Li,?Han Gao,?Yuan Gao,?Hongjiang Li,?Jin Wen,?Pu Wu,?Chenshuaiyu Liu,?Siyang Zhao,?Ke Xiao,?Zhou Liu,?Yu Deng,?Ludong Li?&?Hairen Tan
School of Physical Sciences, University of Science and technology of China, Hefei, China
Beibei Tang?&?Fengjia Fan
i-Lab & Printable Electronics Research Center, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou, China
Changzeng Ding?&?Changqi Ma
Authors Renxing Lin View author publications
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Yurui Wang View author publications
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Qianwen Lu View author publications
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Beibei Tang View author publications
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Jiayi Li View author publications
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Han Gao View author publications
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Yuan Gao View author publications
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Hongjiang Li View author publications
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Changzeng Ding View author publications
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Jin Wen View author publications
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Pu Wu View author publications
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Chenshuaiyu Liu View author publications
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Siyang Zhao View author publications
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Ke Xiao View author publications
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Zhou Liu View author publications
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Changqi Ma View author publications
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Yu Deng View author publications
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Ludong Li View author publications
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Fengjia Fan View author publications
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Hairen Tan View author publications
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Correspondence to Hairen Tan .
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Lin, R., Wang, Y., Lu, Q. et al. All-perovskite tandem solar cells with 3D/3D bilayer perovskite heterojunction. Nature (2023). https://doi.org/10.1038/s41586-023-06278-z
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Received : 07 November 2022
Accepted : 31 May 2023
Published : 08 June 2023
DOI : https://doi.org/10.1038/s41586-023-06278-z
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