Triple halide MA-free perovskite solar cells with ultra-high stability
Jose J. Jeronimo-Rendon a, Silver-Hamill Turren-Cruz b, Jorge Pascual c, Michael Saliba a d, Antonio Abate e
a University of Stuttgart, Institute for Photovoltaics, Pfaffenwaldring 47, 70569 Stuttgart, Germany
b Institute of Advanced Materials (INAM), University Jaume I, Av. Vicent Sos Baynat, s/n, 12071, Castellón de la Plana, Spain
c Polymat, University of the Basque Country UPV/EHU, 20018 Donostia-San Sebastian, Spain
d Helmholtz Young Investigator Group FRONTRUNNER, IEK5-Photovltaics Forschungszentrum Jülich, 52425 Jülich, Germany
e Department of Novel Materials and Interfaces for Photovoltaic Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
London, United Kingdom, 2023 June 12th - 14th
Organizers: Tracey Clarke, James Durrant and Trystan Watson
Poster, Jose J. Jeronimo-Rendon, 272
Publication date: 30th March 2023

Perovskite materials have become promising semiconductors for photovoltaic applications, combined with silicon tandem solar cells owing to their high-power conversion efficiency (PCE) of over 30%. Due to the PSCs still presenting poor long-term stability against recombination losses and moisture issues. Several researchers keep working to break out and give answers to such obstacles. In this work, we report the introduction of chloride ions (Cl-) into a solution-processed MA-free wide band-gap perovskite, for enhancing the device performance and stability under high temperature. This perovskite composition show enhanced charge extraction and transport, as well as reduced non-radiative recombination losses through the passivation of defects due to a noticeable increment in the grain size of perovskite. The PSCs with p-i-n structure achieved PCEs up to 22.4% and ultra-high stability, retaining ≈ 90% of their initial efficiency over 1000 h of continuous unencapsulated operation in a nitrogen atmosphere under high temperature. Furthermore, this triple halide perovskite allowed the fabrication of two-terminal monolithic tandem cells, with an efficiency as high as 27.9%. Overall, this work provides a robust protocol for the solution-processing of a novel perovskite composition that critically enhances operational stability, bringing perovskite materials and devices closer to their commercialization.

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