Sirtl, Maximilian T. ; Hooijer, Rik ; Armer, Melina ; Ebadi, Firouzeh G. ; Mohammadi, Mahdi ; Maheu, Clément ; Weis, Andreas ; Gorkom, Bas T. van ; Häringer, Sebastian ; Janssen, René A. J. ; Mayer, Thomas ; Dyakonov, Vladimir ; Tress, Wolfgang ; Bein, Thomas (2024)
2D/3D Hybrid Cs₂AgBiBr₆ Double Perovskite Solar Cells: Improved Energy Level Alignment for Higher Contact‐Selectivity and Large Open Circuit Voltage.
In: Advanced Energy Materials, 2022, 12 (7)
doi: 10.26083/tuprints-00024315
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Since their introduction in 2017, the efficiency of lead‐free halide perovskite solar cells based on Cs₂AgBiBr₆ has not exceeded 3%. The limiting bottlenecks are attributed to a low electron diffusion length, self‐trapping events and poor selectivity of the contacts, leading to large non‐radiative VOC losses. Here, 2D/3D hybrid double perovskites are introduced for the first time, using phenethyl ammonium as the constituting cation. The resulting solar cells show an increased efficiency of up to 2.5% for the champion cells and 2.03% on average, marking an improvement by 10% compared to the 3D reference on mesoporous TiO₂. The effect is mainly due to a VOC improvement by up to 70 mV on average, yielding a maximum VOC of 1.18 V using different concentrations of phenethylammonium bromide. While these are among the highest reported VOC values for Cs₂AgBiBr₆ solar cells, the effect is attributed to a change in recombination behavior within the full device and a better selectivity at the interface toward the hole transporting material (HTM). This explanation is supported by voltage‐dependent external quantum efficiency, as well as photoelectron spectroscopy, revealing a better energy level alignment and thus a better hole‐extraction and improved electron blocking at the HTM interface.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Sirtl, Maximilian T. ; Hooijer, Rik ; Armer, Melina ; Ebadi, Firouzeh G. ; Mohammadi, Mahdi ; Maheu, Clément ; Weis, Andreas ; Gorkom, Bas T. van ; Häringer, Sebastian ; Janssen, René A. J. ; Mayer, Thomas ; Dyakonov, Vladimir ; Tress, Wolfgang ; Bein, Thomas |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | 2D/3D Hybrid Cs₂AgBiBr₆ Double Perovskite Solar Cells: Improved Energy Level Alignment for Higher Contact‐Selectivity and Large Open Circuit Voltage |
| Sprache: | Englisch |
| Publikationsjahr: | 23 Januar 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2022 |
| Ort der Erstveröffentlichung: | Weinheim |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Energy Materials |
| Jahrgang/Volume einer Zeitschrift: | 12 |
| (Heft-)Nummer: | 7 |
| Kollation: | 12 Seiten |
| DOI: | 10.26083/tuprints-00024315 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/24315 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Since their introduction in 2017, the efficiency of lead‐free halide perovskite solar cells based on Cs₂AgBiBr₆ has not exceeded 3%. The limiting bottlenecks are attributed to a low electron diffusion length, self‐trapping events and poor selectivity of the contacts, leading to large non‐radiative VOC losses. Here, 2D/3D hybrid double perovskites are introduced for the first time, using phenethyl ammonium as the constituting cation. The resulting solar cells show an increased efficiency of up to 2.5% for the champion cells and 2.03% on average, marking an improvement by 10% compared to the 3D reference on mesoporous TiO₂. The effect is mainly due to a VOC improvement by up to 70 mV on average, yielding a maximum VOC of 1.18 V using different concentrations of phenethylammonium bromide. While these are among the highest reported VOC values for Cs₂AgBiBr₆ solar cells, the effect is attributed to a change in recombination behavior within the full device and a better selectivity at the interface toward the hole transporting material (HTM). This explanation is supported by voltage‐dependent external quantum efficiency, as well as photoelectron spectroscopy, revealing a better energy level alignment and thus a better hole‐extraction and improved electron blocking at the HTM interface. |
| Freie Schlagworte: | 2D perovskites, 2D/3D hybrid perovskites, Cs₂AgBiBr₆, double perovskites, solar cells |
| ID-Nummer: | 2103215 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-243158 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 23 Jan 2024 13:38 |
| Letzte Änderung: | 24 Jan 2024 06:49 |
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| Suche nach Titel in: | TUfind oder in Google |
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- 2D/3D Hybrid Cs₂AgBiBr₆ Double Perovskite Solar Cells: Improved Energy Level Alignment for Higher Contact‐Selectivity and Large Open Circuit Voltage. (deposited 23 Jan 2024 13:38) [Gegenwärtig angezeigt]
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