Efficient and stable PbS quantum dot solar cells by triple-cation perovskite passivation
Solution-processed quantum dots (QDs) have a high potential for fabricating low-cost, flexible, and large-scale solar energy harvesting devices. It has recently been demonstrated that hybrid devices employing a single monovalent cation perovskite solution for PbS QD surface passivation exhibit enhan...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2020
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| In: |
ACS nano
Year: 2019, Jahrgang: 14, Heft: 1, Pages: 384-393 |
| ISSN: | 1936-086X |
| DOI: | 10.1021/acsnano.9b05848 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1021/acsnano.9b05848 Verlag: https://doi.org/10.1021/acsnano.9b05848 
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| Verfasserangaben: | Miguel Albaladejo-Siguan, David Becker-Koch, Alexander D. Taylor, Qing Sun, Vincent Lami, Pola Goldberg Oppenheimer, Fabian Paulus, and Yana Vaynzof |
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| 245 | 1 | 0 | |a Efficient and stable PbS quantum dot solar cells by triple-cation perovskite passivation |c Miguel Albaladejo-Siguan, David Becker-Koch, Alexander D. Taylor, Qing Sun, Vincent Lami, Pola Goldberg Oppenheimer, Fabian Paulus, and Yana Vaynzof |
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| 520 | |a Solution-processed quantum dots (QDs) have a high potential for fabricating low-cost, flexible, and large-scale solar energy harvesting devices. It has recently been demonstrated that hybrid devices employing a single monovalent cation perovskite solution for PbS QD surface passivation exhibit enhanced photovoltaic performance when compared to standard ligand passivation. Herein, we demonstrate that the use of a triple cation Cs0.05(MA0.17FA0.83)0.95Pb(I0.9Br0.1)3 perovskite composition for surface passivation of the quantum dots results in highly efficient solar cells, which maintain 96% of their initial performance after 1200 h shelf storage. We confirm perovskite shell formation around the PbS nanocrystals by a range of spectroscopic techniques as well as high-resolution transmission electron microscopy. We find that the triple cation shell results in a favorable energetic alignment to the core of the dot, resulting in reduced recombination due to charge confinement without limiting transport in the active layer. Consequently, photovoltaic devices fabricated via a single-step film deposition reached a maximum AM1.5G power conversion efficiency of 11.3% surpassing most previous reports of PbS solar cells employing perovskite passivation. | ||
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