Identifying and Understanding Critical Degradation Mechanisms of Perovskite based Space Solar Cells: From Radiation to Temperature and Atomic Oxygen

Identifying and Understanding Critical Degradation Mechanisms of Perovskite based Space Solar Cells: From Radiation to Temperature and Atomic OxygenFelix Lang a, Biruk Alebachew a, Sema Sarisözen a, Francisco Pena-Camargo a, Sercan Ozen a, Emilio Guaterrez-Partida a, Eduardo Solano b, Julian Steele c, d, Martin Stolerterfoht a, Dieter Neher aa Universität Potsdam, Soft Matter Physics, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germanyb NCD-SWEET Beamline, ALBA Synchrotron Light Source, Cerdanyola del Vallès, Barcelona, 08290 Spainc Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australiad School of Mathematics and Physics, The University of Queensland, Brisbane, QLD, 4072, AustraliaMaterials for Sustainable Development Conference (MATSUS)Proceedings of MATSUS Spring 2024 Conference (MATSUS24)#PerFut24 - The Future of Metal Halide Perovskites: Fundamental Approaches and Technological ChallengesBarcelona, Spain, 2024 March 4th - 8thOrganizers: Annalisa Bruno, Iván Mora-Seró and Pablo P. BoixOral, Felix Lang, presentation 223DOI: https://doi.org/10.29363/nanoge.matsus.2024.223Publication date: 18th December 2023Perovskite solar cells (PSC) are highly promising candidates for future space photovoltaics due to their high specific power potential. Yet, for successful application, devices need to resist several sets of extremes in space. In this presentation we will discuss their extraordinary radiation tolerance [1]–[3] and then move on to extreme temperatures and temperature cycles, two extremes that perovskites are well suited to. Atomic oxygen (AtOx), on the other hand, corrodes unencapsulated PSCs swiftly, as we identify. And while we find that this can be avoided using ultrathin evaporated 0.7 µm silicon oxide (SiOx) barriers, we set out to understand the AtOx-induced degradation mechanisms of phenethylammonium iodide (PEAI)-2D passivated and non-passivated devices. Surprisingly, degradation is more severe in 2D passivated PSCs. To disentangle damage mechanisms between 2D passivated and non-passivated devices we apply injection-current-dependent electroluminescence (EL) and intensity-dependent photoluminescence quantum yield (IPLQY) measurements. These allow us to derive pseudo-JV curves that are independent of parasitic resistance effect from damaged transport layers. We quantify an implied FF, that remains high after degradation suggesting that the perovskite bulk is not severely degraded. On the other hand, GIWAX studies reveal a degraded surface that limits charge extraction, and thus leads to lower performance metrics. This surface degradation is severely accelerated for 2D passivations and proceeds to areas that are covered by copper contacts due to lateral diffusion of AtOx though the 2D surface owing to the large interplanar distance of 2D perovskites. [1] F. Lang et al., "Efficient minority carrier detrapping mediating the radiation hardness of triple-cation perovskite solar cells under proton irradiation," Energy Environ. Sci., vol. 12, no. 5, pp. 1634–1647, 2019, doi: 10.1039/C9EE00077A. [2] F. Lang et al., "Proton‐Radiation Tolerant All‐Perovskite Multijunction Solar Cells," Adv. Energy Mater., vol. 11, no. 41, p. 2102246, Nov. 2021, doi: 10.1002/aenm.202102246. [3] F. Lang et al., "Radiation Hardness and Self-Healing of Perovskite Solar Cells," Adv. Mater., vol. 28, no. 39, pp. 8726–8731, Oct. 2016, doi: 10.1002/adma.201603326. Acknowledgements:F.L. thanks the Volkswagen Foundation for Funding via the Freigeist Program © FUNDACIO DE LA COMUNITAT VALENCIANA SCITOnanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. 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