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 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.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:14 |
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| Enthalten in: |
ACS nano - 14(2020), 1 vom: 28. Jan., Seite 384-393 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Albaladejo-Siguan, Miguel [VerfasserIn] |
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| Links: |
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| Themen: |
Hybrid perovskite |
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| Anmerkungen: |
Date Revised 12.02.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/acsnano.9b05848 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM303250836 |
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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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| 700 | 1 | |a Becker-Koch, David |e verfasserin |4 aut | |
| 700 | 1 | |a Taylor, Alexander D |e verfasserin |4 aut | |
| 700 | 1 | |a Sun, Qing |e verfasserin |4 aut | |
| 700 | 1 | |a Lami, Vincent |e verfasserin |4 aut | |
| 700 | 1 | |a Oppenheimer, Pola Goldberg |e verfasserin |4 aut | |
| 700 | 1 | |a Paulus, Fabian |e verfasserin |4 aut | |
| 700 | 1 | |a Vaynzof, Yana |e verfasserin |4 aut | |
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