Radiative Recombination in Quadruple Cation Organic-Inorganic Mixed Halide Perovskite Layers: Electron Irradiation Induced Ageing Effects

Pierfrancesco Aversa^a, Senol Öz^b^,^f, Eunhwan Jung^b, Olivier Plantevin^c, Olivier Cavani^a, Nadège Ollier^a, Bernard Geffroy^d^,^e, Sanjay Mathur^b, Catherine Corbel^a

^aLSI, CEA/DRF/lRAMIS, Ecole Polytechnique, CNRS, lnstitut Polytechnique de Paris, F-91128 Palaiseau

^bInstitute of Inorganic and Material Chemistry, University of Cologne, Germany, Greinstraße, 6, Köln, Germany

^cCSNSM, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay Campus

^dLPICM, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France

^eLICSEN, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay 91191 Gif-sur-Yvette Cedex,France

^fGraduate School of Engineering, Toin University of Yokohama, 1614, Kurogane-cho, Aoba, Yokohama, Kanagawa, Japan 225-8503

Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Fall Meeting19 (NFM19)

#PERInt19. Interplay of composition, structure and electronic properties in halide-perovskites

Berlin, Germany, 2019 November 3rd - 8th

Organizer: Pablo P. Boix

Oral, Pierfrancesco Aversa, presentation 053
DOI: https://doi.org/10.29363/nanoge.nfm.2019.053
Publication date: 18th July 2019

Hybrid organic-inorganic halide perovskites attract much attention for their application in optoelectronic devices. However, the performance in domain such as photovoltaics still strongly depends on the quality of the active layers and their capacity to withstand device operation without irreversible damage. For example, applying a bias in dark in CH₃NH₃PbI₃ (MAPI) based solar cells results in ion migration [1]. This questions the generation and role of defects under bias and light illumination [2] on photovoltaics performance.

Most recent works are oriented towards the study of multi cation organic-inorganic mixed halide perovskites, 2/3/4APbX₃, where the A sites can be occupied by a distribution of 2-4 metallic/organic ions - Cs⁺ (cesium ion), GA⁺ (guanidinium)/MA⁺ (methylammonium), FA⁺ (formamidinium) and X sites halide ions I^- (iodide), Br^- (bromide). The reason is that these mixed perovskites appear more stable than MAPI under PV operation [3] [4] [5].

In this work, electron irradiation is used as a tool for the introduction of point defects in a controlled way in polycrystalline 4APbX₃ layers spin coated on glass. The created point defects may introduce energy levels and modify electronic and light emitting properties of the material. The defect production has a strong effect on the photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectra. The results illustrate how the PL and TRPL properties depend on the layer history before and after electron irradiation.

[1] Lee et al., Direct Experimental Evidence of Halide Ionic Migration under Bias in CH3NH3PbI3-xClx Based Perovskite Solar Cells using GD-OES Analysis, ACS Energy Lett., 2017 DOI: 10.1021/acsenergylett.7b00150

[2] DeQuilettes et al., Photo-induced halide redistribution in organic–inorganic perovskite films, Nature Communications, 2016 DOI: 10.1038/ncomms11683

[3] M. Shahbazi and H. Wang, Progess in reseach on the stability of organometal perovskite solar cells, Solar Energy, 123 (2016) 74-87

[4] Saliba, M.; Matsui, T.; Seo, J.-Y.; Domanski, K.; Correa-Baena, J.-P.; Nazeeruddin, M. K.; Zakeeruddin, S. M.; Tress, W.; Abate, A.; Hagfeldt, A.; Grätzel, M. Energy Environ. Sci., 9 (2016) 1989–1997

[5] https://www.nrel.gov/pv/assets/pdfs/pv-efficiencies-07-17-2018.pdf

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