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Article

Formamidinium Lead Iodide Perovskite Films with Polyvinylpyrrolidone Additive for Active Layer in Perovskite Solar Cells, Enhanced Stability and Electrical Conductivity

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Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia
2
Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Efrat Lifshitz
Materials 2021, 14(16), 4594; https://doi.org/10.3390/ma14164594
Received: 20 July 2021 / Revised: 3 August 2021 / Accepted: 10 August 2021 / Published: 16 August 2021
(This article belongs to the Special Issue Perovskite Materials for Photovoltaic Applications)
In this paper, we studied the influence of polyvinylpyrrolidone (PVP) as a stabilization additive on optical and electrical properties of perovskite formamidinium lead iodide (FAPI) polycrystalline thin films on ZnO nanorods (ZNR). FAPI (as an active layer) was deposited from a single solution on ZNR (low temperature processed electron transport layer) using a one-step method with the inclusion of an anti-solvent. The role of PVP in the formation of the active layer was investigated by scanning electron microscopy and contact angle measurements to observe the effect on morphology, while X-ray diffraction was used as a method to study the stability of the film in an ambient environment. The effect of the PVP additive on the optical and electrical properties of the perovskite thin films was studied via photoluminescence, UV-Vis measurements, and electrical impedance spectroscopy. We have demonstrated that PVP inclusion in solution-processed perovskite FAPI thin films prevents the degradation of the film in an ambient atmosphere after aging for 2 months. The inclusion of the PVP also improves the infiltration of FAPI perovskite into ZnO nanostructures, increases electrical conductivity and radiative recombination of the photo-generated charge carriers. These results show promising information for promoting PVP stabilized FAPI perovskites for the new generation of photovoltaic devices. View Full-Text
Keywords: formamidinium lead iodide perovskite; polyvinylpyrrolidone; ZnO nanorods; optical properties; electrical properties formamidinium lead iodide perovskite; polyvinylpyrrolidone; ZnO nanorods; optical properties; electrical properties
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MDPI and ACS Style

Kojić, V.; Bohač, M.; Bafti, A.; Pavić, L.; Salamon, K.; Čižmar, T.; Gracin, D.; Juraić, K.; Leskovac, M.; Capan, I.; Gajović, A. Formamidinium Lead Iodide Perovskite Films with Polyvinylpyrrolidone Additive for Active Layer in Perovskite Solar Cells, Enhanced Stability and Electrical Conductivity. Materials 2021, 14, 4594. https://doi.org/10.3390/ma14164594

AMA Style

Kojić V, Bohač M, Bafti A, Pavić L, Salamon K, Čižmar T, Gracin D, Juraić K, Leskovac M, Capan I, Gajović A. Formamidinium Lead Iodide Perovskite Films with Polyvinylpyrrolidone Additive for Active Layer in Perovskite Solar Cells, Enhanced Stability and Electrical Conductivity. Materials. 2021; 14(16):4594. https://doi.org/10.3390/ma14164594

Chicago/Turabian Style

Kojić, Vedran, Mario Bohač, Arijeta Bafti, Luka Pavić, Krešimir Salamon, Tihana Čižmar, Davor Gracin, Krunoslav Juraić, Mirela Leskovac, Ivana Capan, and Andreja Gajović. 2021. "Formamidinium Lead Iodide Perovskite Films with Polyvinylpyrrolidone Additive for Active Layer in Perovskite Solar Cells, Enhanced Stability and Electrical Conductivity" Materials 14, no. 16: 4594. https://doi.org/10.3390/ma14164594

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