21.6%-Efficient Monolithic Perovskite/Cu(In,Ga)Se₂ Tandem Solar Cells with Thin Conformal Hole Transport Layers for Integration on Rough Bottom Cell Surfaces

Marko Jošt; Tobias Bertram; Dibyashree Koushik; Jose A. Marquez; Marcel A. Verheijen; Marc D. Heinemann; Eike Köhnen; Amran Al-Ashouri; Steffen Braunger; Felix Lang; Bernd Rech; Thomas Unold; Mariadriana Creatore; Iver Lauermann; Christian A. Kaufmann; Rutger Schlatmann; Steve Albrecht

doi:10.1021/acsenergylett.9b00135

journal article·2019-02-08

21.6%-Efficient Monolithic Perovskite/Cu(In,Ga)Se₂ Tandem Solar Cells with Thin Conformal Hole Transport Layers for Integration on Rough Bottom Cell Surfaces

Marko Jošt, Tobias Bertram, Dibyashree Koushik, Jose A. Marquez, Marcel A. Verheijen, Marc D. Heinemann, Eike Köhnen, Amran Al-Ashouri, Steffen Braunger, Felix Lang, Bernd Rech, Thomas Unold, Mariadriana Creatore, Iver Lauermann, Christian A. Kaufmann, Rutger Schlatmann, Steve Albrecht

ACS Energy Letters· Volume 4· Issue 2

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Source abstract

Abstract

Perovskite-based tandem solar cells can increase the power conversion efficiency (PCE) of conventional single-junction photovoltaic devices. Here, we present monolithic perovskite/CIGSe tandem solar cells with a perovskite top cell fabricated directly on an as-grown, rough CIGSe bottom cell. To prevent potential shunting due to the rough CIGSe surface, a thin NiOx layer is conformally deposited via atomic layer deposition on the front contact of the CIGSe bottom cell. The performance is further improved by an additional layer of the polymer PTAA at the NiOx/perovskite interface. This hole transport bilayer enables a 21.6% stabilized PCE of the tandem device at ∼0.8 cm2 active area. We use TEM/EDX measurements to investigate the deposition uniformity and conformality of the NiOx and PTAA layers. By absolute photoluminescence measurements, the contribution of the individual subcells to the tandem VOC is determined, revealing that further fine-tuning of the recombination layers might improve the tandem VOC. Finally, on the basis of the obtained results, we give guidelines to improve monolithic perovskite/CIGSe tandems toward predicted PCE estimates above 30%.

Source: openalex_inverted_index · Quality: baseline

Research context

Polymers Electronic materials Materials processing

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany

PVcomB, Helmholtz Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany

Plasma and Materials Processing, Department of Applied Physics, Eindhoven University of Technology (TU/e), 5600 MB Eindhoven, The Netherlands

Department of Structure and Dynamics of Energy Materials, Helmholtz-Zentrum-Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany

Eurofins Materials Science BV, High Tech Campus 11, 5656 AE Eindhoven, The Netherlands

Institute for Silicon Photovoltaics, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany

Hochschule für Technik und Wirtschaft Berlin, Wilhelminenhofstrasse 75A, 12459 Berlin, Germany

Faculty IV − Electrical Engineering and Computer Science, Technical University Berlin, Marchstraße 23, 10587 Berlin, Germany

Funding

Bundesministerium f?r Bildung und Forschung · Bundesministerium f?r Wirtschaft und Technologie · Alexander von Humboldt-Stiftung · Nederlandse Organisatie voor Wetenschappelijk Onderzoek

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