Formamidinium Lead Iodide Perovskite Films with Polyvinylpyrrolidone Additive for Active Layer in Perovskite Solar Cells, Enhanced Stability and Electrical Conductivity
| Autor: | Krešimir Salamon, Luka Pavić, Andreja Gajović, Arijeta Bafti, Mirela Leskovac, Davor Gracin, Mario Bohač, Tihana Čižmar, Ivana Capan, Krunoslav Juraić, Vedran Kojić |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
optical properties
Technology Materials science Scanning electron microscope ZnO nanorods polyvinylpyrrolidone Article Contact angle medicine General Materials Science Thin film Perovskite (structure) formamidinium lead iodide perovskite Microscopy QC120-168.85 Polyvinylpyrrolidone QH201-278.5 Engineering (General). Civil engineering (General) TK1-9971 Active layer Formamidinium Descriptive and experimental mechanics Chemical engineering electrical properties Nanorod Electrical engineering. Electronics. Nuclear engineering TA1-2040 medicine.drug |
| Zdroj: | Materials Volume 14 Issue 16 Materials, Vol 14, Iss 4594, p 4594 (2021) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14164594 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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