Correlation of Band Bending and Ionic Losses in 1.68 eV Wide Band Gap Perovskite Solar Cells

Scheler, Florian; Mariotti, Silvia; Mantione, Daniele; Shah, Sahil; Menzel, Dorothee; Köbler, Hans; Simmonds, Maxim; Gries, Thomas W.; Kurpiers, Jona; Škorjanc, Viktor; Li, Jinzhao; Al‐Ashouri, Amran; Wagner, Philipp; Harvey, Steven P.; Yang, Fengjiu; Rusu, Marin; Unold, Thomas; Stannowski, Bernd; Zhu, Kai; Lang, Felix; Neher, Dieter; Unger, Eva; Abate, Antonio; Mecerreyes, David; Stolterfoht, Martin; Köhnen, Eike; Korte, Lars; Topič, Marko; Albrecht, Steve

doi:10.1002/aenm.202404726

Correlation of Band Bending and Ionic Losses in 1.68 eV Wide Band Gap Perovskite Solar Cells

Journal Article · Tue Dec 17 00:00:00 EST 2024 · Advanced Energy Materials

DOI:https://doi.org/10.1002/aenm.202404726· OSTI ID:2562983

^[1]; Mariotti, Silvia ^[2]; Mantione, Daniele ^[3]; Shah, Sahil ^[4]; Menzel, Dorothee ^[2]; Köbler, Hans ^[2]; Simmonds, Maxim ^[2]; Gries, Thomas W. ^[2]; Kurpiers, Jona ^[2]; Škorjanc, Viktor ^[2]; Li, Jinzhao ^[2]; Al‐Ashouri, Amran ^[2]; Wagner, Philipp ^[2]; Harvey, Steven P. ^[5]; Yang, Fengjiu ^[6]; Rusu, Marin ^[2]; Unold, Thomas ^[2]; Stannowski, Bernd ^[2]; Zhu, Kai ^[6]; Lang, Felix ^[4] more »

Solar Energy Division Helmholtz‐Zentrum Berlin 12489 Berlin Germany, Faculty of Electrical Engineering University of Ljubljana Ljubljana 1000 Slovenia
Solar Energy Division Helmholtz‐Zentrum Berlin 12489 Berlin Germany
POLYMAT University of the Basque Country Donostia‐San Sebastián 20018 Spain, Ikerbasque, Basque Foundation for Science Bilbao 48013 Spain
Institute of Physics and Astronomy University of Potsdam 14476 Potsdam Germany
Materials Science Center Chemical and Computational Sciences (MCCS) National Renewable Energy Laboratory Golden CO 80401 USA
Chemistry and Nanoscience Center National Renewable Energy Laboratory Golden CO 80401 USA
Electronic Engineering Department The Chinese University of Hong Kong Hong Kong SAR China
Faculty of Electrical Engineering University of Ljubljana Ljubljana 1000 Slovenia
Solar Energy Division Helmholtz‐Zentrum Berlin 12489 Berlin Germany, Faculty of Electrical Engineering and Computer Science Technical University Berlin Marchstraße 23 10587 Berlin Germany

Abstract

Perovskite solar cells (PSCs) are promising for high‐efficiency tandem applications, but their long‐term stability, particularly due to ion migration, remains a challenge. Despite progress in stabilizing PSCs, they still fall short compared to mature technologies like silicon. This study explores how different piperazinium salt treatments using iodide, chloride, tosylate, and bistriflimide anions affect the energetics, carrier dynamics, and stability of 1.68 eV bandgap PSCs. Chloride‐based treatments achieved the highest power conversion efficiency (21.5%) and open‐circuit voltage (1.28 V), correlating with stronger band bending and n‐type character at the surface. At the same time, they showed reduced long‐term stability due to increased ionic losses. Tosylate‐treated devices offered the best balance, retaining 96.4% efficiency after 1000 h (ISOS‐LC‐1I). These findings suggest that targeted surface treatments can enhance both efficiency and stability in PSCs.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: Agencia Estatal de Investigación (AEI); Ministerio de Ciencia, Innovación y Universidades (MICIU); USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 2562983

Alternate ID(s):: OSTI ID: 2491423

Report Number(s):: NREL/JA--5K00-91050; 2404726

Journal Information:: Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 16 Vol. 15; ISSN 1614-6832

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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