Understanding the impact of SrI2 additive on the properties of Sn-based halide perovskites
| Autor: | Mustafa M. Demir, Yu An, Caria Evans, Carlo Andrea Riccardo Perini, Juanita Hidalgo, Jacob N. Vagott, Kathryn Bairley, Juan-Pablo Correa-Baena, Andrés-Felipe Castro-Méndez, Hurriyet Yuce, Pablo Franco Betancur |
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| Rok vydání: | 2022 |
| Předmět: |
Diffraction
Materials science Photoluminescence Scanning electron microscope business.industry Organic Chemistry Halide Alkali metal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Inorganic Chemistry X-ray photoelectron spectroscopy Chemical engineering Photovoltaics Electrical and Electronic Engineering Physical and Theoretical Chemistry business Spectroscopy Perovskite (structure) |
| Zdroj: | Optical Materials. 123:111806 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2021.111806 |
| Popis: | Organic-inorganic halide perovskites have been identified as favorable candidates for the next generation of photovoltaics. Adding alkali metal halides to perovskite films has been shown to be a viable option to improve the perovskite film quality and to modulate their fundamental properties. In this work, we perform optical and electron-beam based characterizations of mixed Sn/Pb based perovskite films to investigate the effect of the addition of the alkaline metal halide SrI2. By analyzing structural (X-ray diffraction), morphological (Scanning Electron Microscopy), optical (photoluminescence), and chemical properties (X-ray photoelectron spectroscopy), we show a complex interplay of effects upon addition of Sr2+ into the perovskite solution. Low concentrations of Sr2+ increases lattice strain, which hints at incorporation of the additive into the perovskite lattice and improves the film optoelectronic properties. As the additive concentration increases beyond 0.5 mol %, microstrain decreases. At concentrations >0.5 mol %, Sr2+ induces significant reduction of the average domain size, which impacts both structural and optical properties of the perovskite film. |
| Databáze: | OpenAIRE |
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