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Title: Understanding the impact of SrI2 additive on the properties of Sn-based halide perovskites
Authors: Yüce, Hürriyet
Perini, Carlo A. R.
Hidalgo, Juanita
Castro-Mendez, Andres-Felipe
Evans, Caria
Demir, Mustafa Muammer
Izmir Institute of Technology
Georgia Institute of Technology
Georgia Institute of Technology
Georgia Institute of Technology
Georgia Institute of Technology
Izmir Institute of Technology
Keywords: Halide perovskites
Lead free
Issue Date: 2022
Publisher: Elsevier
Abstract: 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.
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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