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2. Loading Precursors into Self‐Assembling Contacts for Improved Performance and Process Control in Evaporated Perovskite Solar Cells.

Author

Leyden, Matthew R., Škorjanc, Viktor, Miaskiewicz, Aleksandra, Severin, Stefanie, Maniyarasu, Suresh, Gries, Thomas, Beckedahl, Johannes, Scheler, Florian, Simmonds, Maxim, Holzhey, Philippe, Kurpiers, Jona, Korte, Lars, Roß, Marcel, and Albrecht, Steve

Abstract

Organo‐lead‐halide perovskites are promising materials for solar cell applications with efficiencies now exceeding 26% for single junction, and over 33% for silicon tandem devices. Evaporation has proven viable for industrial scale‐up but presents challenges for perovskite materials. Perovskite precursor is introduced into self‐assembling MeO‐2PACz hole transport layers for application to 4 source perovskite coevaporation. This allows precursors that can be difficult to add via evaporation, like methylammonium chloride. These precursor molecules influence growth during evaporation, film behavior during annealing as measured by photoluminescence, and aid the conversion to perovskite as shown by X‐Ray diffraction. Devices have improved power conversion efficiency and stability compared to a control sample within the same evaporation. The best cells reach ≈21% efficiency and comparable performing ≈20% cells maintain their original efficiency after 1000 h of maximum power tracking at 25 °C. This process provides significant process flexibility for perovskite evaporation and requires no additional steps. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Vapor Phase Deposition of Perovskite Photovoltaics: Short Track to Commercialization?

Author

Abzieher, Tobias, primary, Moore, David T., additional, Roß, Marcel, additional, Albrecht, Steve, additional, Silvia, Jared, additional, Tan, Hairen, additional, Jeangros, Quentin, additional, Ballif, Christophe, additional, Hoerantner, Maximilian, additional, Kim, Beom-Soo, additional, Bolink, Henk J., additional, Pistor, Paul, additional, Goldschmidt, Jan Christoph, additional, Chiang, Yu-Hsien, additional, Stranks, Samuel D, additional, Borchert, Juliane, additional, McGehee, Michael D., additional, Morales-Masis, Monica, additional, Patel, Jay, additional, Bruno, Annalisa, additional, and Paetzold, Ulrich Wilhelm, additional

Published
2024
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4. Minimizing Interfacial Recombination in 1.8 Ev Triple‐Halide Perovskites for 27.2% Efficient All‐Perovskite Tandems

Author

Yang, Fengjiu, primary, Tockhorn, Philipp, additional, Musiienko, Artem, additional, Lang, Felix, additional, Menzel, Dorothee, additional, Macqueen, Rowan, additional, Köhnen, Eike, additional, Xu, Ke, additional, Mariotti, Silvia, additional, Mantione, Daniele, additional, Merten, Lena, additional, Hinderhofer, Alexander, additional, Li, Bor, additional, Wargulski, Dan Ralf, additional, Harvey, Steven P., additional, Zhang, Jiahuan, additional, Scheler, Florian, additional, Berwig, Sebastian, additional, Roß, Marcel, additional, Thiesbrummel, Jarla, additional, Al‐Ashouri, Amran, additional, Brinkmann, Kai Oliver, additional, Riedl, Thomas, additional, Schreiber, Frank, additional, Abou‐Ras, Daniel, additional, Snaith, Henry, additional, Neher, Dieter, additional, Korte, Lars, additional, Stolterfoht, Martin, additional, and Albrecht, Steve, additional

Published
2023
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5. Minimizing Interfacial Recombination in 1.8 eV Triple‐Halide Perovskites for 27.5% Efficient All‐Perovskite Tandems.

Author

Yang, Fengjiu, Tockhorn, Philipp, Musiienko, Artem, Lang, Felix, Menzel, Dorothee, Macqueen, Rowan, Köhnen, Eike, Xu, Ke, Mariotti, Silvia, Mantione, Daniele, Merten, Lena, Hinderhofer, Alexander, Li, Bor, Wargulski, Dan R., Harvey, Steven P., Zhang, Jiahuan, Scheler, Florian, Berwig, Sebastian, Roß, Marcel, and Thiesbrummel, Jarla

Published
2024
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7. Illumination-Driven Energy Level Realignment at Buried Interfaces between Organic Charge Transport Layers and a Lead Halide Perovskite

Author

Zu, Fengshuo, Roß, Marcel, Frohloff, Lennart, Shin, Dongguen, Tessler, Nir, Albrecht, Steve, Koch, Norbert, Zu, Fengshuo, Roß, Marcel, Frohloff, Lennart, Shin, Dongguen, Tessler, Nir, Albrecht, Steve, and Koch, Norbert

Abstract

Tremendous progress in employing metal halide perovskites (MHPs) in a variety of applications, especially in photovoltaics, has been made in the past decade. To unlock the full potential of MHP materials in optoelectronic devices, an improved understanding of the electronic energy level alignment at perovskite-based interfaces is required. This particularly pertains to such interfaces under device operation conditions, e.g. under illumination with visible light such as in a solar cell. Herein, it is revealed that the energy level alignment at the buried interface between a double cation lead halide perovskite film and charge-selective organic transport layers changes upon white light illumination. This is found from photoemission experiments performed with the samples in dark and under illumination, and the interfacial energy level shift is reversible. The underlying mechanism is attributed to the accumulation of one charge carrier type within the perovskite film at the interface under illumination, as a result of the charge-selective nature of the organic layer. The fact that the interfacial energy level alignment at MHP-based junctions under illumination can differ from that in dark is to be taken into account to fully rationalize device characteristics., Peer Reviewed

Published
2022

8. Revealing the Role of Methylammonium Iodide Purity on the Vapor‐Phase Deposition Process of Perovskites

Author

Roß, Marcel, Stutz, Marvin B., Albrecht, Steve, Roß, Marcel, Stutz, Marvin B., and Albrecht, Steve

Abstract

Vapor deposition processes, well established in the industry, are considered a cost‐effective manufacturing route for large‐area depositions of lead halide perovskites. However, the vapor deposition of perovskites is constrained by its low reproducibility, whereby in particular the evaporation of methylammonium iodide (MAI) is frequently reported as extremely challenging. Herein, the influence of impurities on the evaporation dynamics of MAI is analyzed. It is proved that MAI heated in a high vacuum, depending on the purity, either undergoes a sublimation with a subsequent desublimation or a chemical decomposition with a following reverse reaction, leading to solid MAI in both cases. In situ mass spectrometry enables us to show that low purity MAI containing water and methylammonium phosphite impurities mainly sublimes, which results in a directional and by crystal microbalances traceable evaporation. In contrast, high purity MAI sublimes at higher temperatures and tends to form decomposition products such as methylamine and hydrogen iodide, which omnidirectional diffuse and can react with lead iodide to perovskite. The findings reveal the reason for the reported challenges, serve as a guideline for future material selections, and can enhance the reproducibility of the evaporation process to achieve a more controlled solar cell fabrication., Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347, Helmholtz Association within the HySPRINT Innovation Lab Project, HyPerCells Joint Graduate School, Peer Reviewed

Published
2022

11. 27.9% Efficient Monolithic Perovskite/Silicon Tandem Solar Cells on Industry Compatible Bottom Cells

Author

Köhnen, Eike, Wagner, Philipp, Lang, Felix, Cruz, Alexandros, Li, Bor, Roß, Marcel, Jošt, Marko, Morales-Vilches, Anna B., Topič, Marko, Stolterfoht, Martin, Neher, Dieter, Korte, Lars, Rech, Bernd, Schlatmann, Rutger, Stannowski, Bernd, and Albrecht, Steve

Subjects
ddc:600
Abstract

Monolithic perovskite/silicon tandem solar cells recently surpass the efficiency of silicon single‐junction solar cells. Most tandem cells utilize >250 μm thick, planarized float‐zone (FZ) silicon, which is not compatible with commercial production using

Published
2021

12. Co‐Evaporated Formamidinium Lead Iodide Based Perovskites with 1000 h Constant Stability for Fully Textured Monolithic Perovskite/Silicon Tandem Solar Cells

Author

Roß, Marcel, primary, Severin, Stefanie, additional, Stutz, Marvin Björn, additional, Wagner, Philipp, additional, Köbler, Hans, additional, Favin‐Lévêque, Martin, additional, Al‐Ashouri, Amran, additional, Korb, Paul, additional, Tockhorn, Philipp, additional, Abate, Antonio, additional, Stannowski, Bernd, additional, Rech, Bernd, additional, and Albrecht, Steve, additional

Published
2021
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13. 27.9% Efficient Monolithic Perovskite/Silicon Tandem Solar Cells on Industry Compatible Bottom Cells

Author

Köhnen, Eike, primary, Wagner, Philipp, additional, Lang, Felix, additional, Cruz, Alexandros, additional, Li, Bor, additional, Roß, Marcel, additional, Jošt, Marko, additional, Morales-Vilches, Anna B., additional, Topič, Marko, additional, Stolterfoht, Martin, additional, Neher, Dieter, additional, Korte, Lars, additional, Rech, Bernd, additional, Schlatmann, Rutger, additional, Stannowski, Bernd, additional, and Albrecht, Steve, additional

Published
2021
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17. Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

Author

Al-Ashouri, Amran, primary, Magomedov, Artiom, additional, Roß, Marcel, additional, Jošt, Marko, additional, Talaikis, Martynas, additional, Chistiakova, Ganna, additional, Bertram, Tobias, additional, Márquez, José A., additional, Köhnen, Eike, additional, Kasparavičius, Ernestas, additional, Levcenco, Sergiu, additional, Gil-Escrig, Lidón, additional, Hages, Charles J., additional, Schlatmann, Rutger, additional, Rech, Bernd, additional, Malinauskas, Tadas, additional, Unold, Thomas, additional, Kaufmann, Christian A., additional, Korte, Lars, additional, Niaura, Gediminas, additional, Getautis, Vytautas, additional, and Albrecht, Steve, additional

Published
2019
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18. Fully Vacuum‐Processed Perovskite Solar Cells on Pyramidal Microtextures.

Author

Gil-Escrig, Lidón, Roß, Marcel, Sutter, Johannes, Al-Ashouri, Amran, Becker, Christiane, and Albrecht, Steve

Subjects
SILICON solar cells, SOLAR cells, PEROVSKITE, PYRAMIDAL neurons, SILICON wafers, LEAD iodide, METAL halides
Abstract

Solar cells based on metal halide perovskites have attracted tremendous attention due to the rapid increase in performance of single junctions and tandem solar cells. Recently, highest perovskite/silicon tandem efficiencies are realized with front‐side polished silicon wafers or adapted microstructure of textured silicon solar cells. One way to integrate perovskite top cells on typical micrometer‐sized pyramidal structures, is conformal vacuum‐based perovskite deposition. Herein, fully vacuum‐based perovskite solar cells are developed on top of random pyramidal microtextured glass substrates with a pyramid size up to 9 μm. This method allows improvement of the light management of the textured perovskite solar cell and resembles the typical pyramid topography of silicon solar cells as a step toward monolithic tandem integration. Moreover, to improve the quality of the perovskite on the textured substrates, three different methylammonium lead iodide (MAPbI3) films are tested by adjusting the rate ratio of the precursors. Optimized ratios for textured substrates with higher PbI2 rates enable a transient photoluminescence decay time above 0.75 μs approaching that of planar substrates at around 1.2 μs. Finally, a efficiency over 15% is achieved, which is, to the best of our knowledge, the first reported device on microscopically textured glass by co‐evaporated ion. [ABSTRACT FROM AUTHOR]

Published
2021
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20. Expression of tetraspanin protein CD63 enhances the PTK-indueed inhibition of ROMK channels.

Author

Dao-Hong Lin, Rrik-Jan Kamsteeg, Sterling, Hyacinth, Yan Jin, Yan Zhang, Ross, Marcel, Spencer, Joanna, Caplan, Michael, and Wen-Hui Wang

Subjects
POTASSIUM channels, PROTEIN-tyrosine kinases, CELLS, OVUM, PHOSPHORYLATION, AMINO acids, ENDOCYTOSIS, KIDNEYS
Abstract

Tetraspanin proteins have been shown to associate with activated PKC and to link PKC to its substates. In the present study, we examined the role of CD63 in mediating the effect of protein tyrosine kinase (PTK) on ROMK channels. Immunoprecipitation with CD63 antibody of lysates derived from renal outer medulla and cortex or HEK293 cells transfected with CD63 and c-Src led to co-precipitation of c-Src. We then used two electrode voltage clamp to study the effect of CD63 on ROMK channels in Xenopus oocytes. Although coexpression of CD63 had no effect on K currents in oocytes injected with ROMK1, it significantly enhanced the c-Src-induced inhibition of ROMK channels. The effect of CD63 on the cSrc-induced inhibition is not due to a decreased expression of ROMK1 channels, because inhibition of PTK with Herbimycin A abolished the inhibitory effect of c-Src on ROMK channels in oocytes injected with ROMK1+c-Src+CD63. Furthermore, coexpression of CD63 enhanced tyrosine phosphorylation of ROMK1 in HEK293 cells. Deletion of the last ten amino acids of the C-terminus of CD63, which contains an endocytosis motif, did not affect the association between c-Sre and CD63. However, coexpression of the truncated CD63 abolished the inhibitory effect of c-Src on ROMK channels and decreased tyrosine phosphorylation of ROMK1 in comparison to that of HEK293 cells transfected with c-Src+ROMK1 or c-Src+ROMK1+CD63. Also, inhibition of PTK did not increase K currents in oocytes injected with ROMK1, c-Src and truncated CD63. We conclude that CD63 is associated with c-Src in the kidney and that coexpression of CD63 enhances the tyrosine phosphorylation of ROMK channels. [ABSTRACT FROM AUTHOR]

Published
2007

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