Abstract
Inverted (pin) perovskite solar cells (PSCs) afford improved operating stability in comparison to their nip counterparts but have lagged in power conversion efficiency (PCE). The energetic losses responsible for this PCE deficit in pin PSCs occur primarily at the interfaces between the perovskite and the charge-transport layers. Additive and surface treatments that use passivating ligands usually bind to a single active binding site: This dense packing of electrically resistive passivants perpendicular to the surface may limit the fill factor in pin PSCs. We identified ligands that bind two neighboring lead(II) ion (Pb2+) defect sites in a planar ligand orientation on the perovskite. We fabricated pin PSCs and report a certified quasi–steady state PCE of 26.15 and 24.74% for 0.05– and 1.04–square centimeter illuminated areas, respectively. The devices retain 95% of their initial PCE after 1200 hours of continuous 1 sun maximum power point operation at 65°C.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 189-193 |
| Number of pages | 5 |
| Journal | Science |
| Volume | 384 |
| Issue number | 6692 |
| DOIs | |
| State | Published - Apr 12 2024 |
Funding
Funding: This work was supported in part by the Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7). This work was also supported by the Natural Sciences and Engineering Council of Canada and the Vanier Canada Graduate Scholarship. A.S.R.B. acknowledges support from King Abdullah University of Science and Technology (KAUST) through the Ibn Rushd Postdoctoral Fellowship Award. This research was made possible by the US Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office award no. DE-EE0008753. M.G.K. is supported by the US Department of Energy, Office of Science, Basic Energy Science, under award number DE-SC-0012541 (fundamental studies on metal halides). This work was partially funded by the Trienens Institute for Sustainability and Energy at Northwestern University. Z.N. acknowledges support from the National Key Research Program (2021YFA0715502) and the National Science Fund of China (61935016, 22175118, and 92056119), as well as the Double First-Class Initiative Fund of ShanghaiTech University. This work made use of the SPID, EPIC, and Keck-II facilities of Northwestern University’s NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-2025633). This work was supported by the International Institute of Nanotechnology, Northwestern University, and Northwestern’s MRSEC program (NSF DMR-1720139). Funding: This work was supported in part by the Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7). This work was also supported by the Natural Sciences and Engineering Council of Canada and the Vanier Canada Graduate Scholarship. A.S.R.B. acknowledges support from King Abdullah University of Science and Technology (KAUST) through the Ibn Rushd Postdoctoral Fellowship Award. This research was made possible by the US Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office award no. DE-EE0008753. M.G.K. is supported by the US Department of Energy, Office of Science, Basic Energy Science, under award number DE-SC-0012541 (fundamental studies on metal halides). This work was partially funded by the Trienens Institute for Sustainability and Energy at Northwestern University. Z.N. acknowledges support from the National Key Research Program (2021YFA0715502) and the National Science Fund of China (61935016, 22175118, and 92056119), as well as the Double First-Class Initiative Fund of ShanghaiTech University. This work made use of the SPID, EPIC, and Keck-II facilities of Northwestern University’s NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-2025633). This work was supported by the International Institute of Nanotechnology, Northwestern University, and Northwestern’s MRSEC program (NSF DMR-1720139). Author contributions: Conceptualization: H.C.; Device fabrication: H.C.; Film fabrication and characterization: H.C., C.L., W.Z., Y.Y.; TPC and TOF-SIMS: Y.Y., C.L.; DFT calculations: J.X.; UPS and XRD measurements: W.Z., Q.Z.; SEM and XPS measurements: C.L., Y.Y., A.S.R.B., Ya.L.; KPFM measurements: Y.Y., P.S.; PL, TRPL, PLQY measurements: A.M., Y.Y., C.L., H.W., Z.W., L.Z., J.W., Yu.L., S.T.; Fracture energy measurements: M.L., N.R.; Writing – original draft: A.M.; Writing – review and editing: H.C., C.L., J.X., B.C., M.I.S., S.H., T.F., M.G.K., Z.N., E.H.S.; Supervision: B.C., Z.N., E.H.S. Competing interests: B.C., H.C., and E.H.S. are filing a patent based on this work. The other authors declare no competing interests. Data and materials availability: All data are available in the main text or the supplementary materials. License information: Copyright © 2024 the authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original US government works. https://www. science.org/about/science-licenses-journal-article-reuse
ASJC Scopus subject areas
- General
