Dimesso, L. ; Fasel, C. ; Lakus-Wollny, K. ; Mayer, T. ; Jaegermann, W. (2017)
Thermal stability of lead-free CH3NH3SnxI3 systems (0.9 ≤ x ≤ 1.1) for photovoltaics.
In: Materials Science in Semiconductor Processing, 68
doi: 10.1016/j.mssp.2017.06.012
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Methylammonium-tin-iodide (MASnxI3, 0.9 ≤ x ≤ 1.1) systems were prepared by precipitation process in aqueous solutions. The “as prepared” MASnxI3 systems exhibited a tetragonal crystalline phase (space group I4cm) with polyhedral crystallites (length 50–400 µm). The as prepared samples were annealed at T = 150 °C for t = 8 h under nitrogen and synthetic air. Under nitrogen, the CH3NH3SnxI3 systems adopt nearly-cubic tetragonal structure (space group P4mm) with crystallites of 2–4 µm length whereas a degradation process with formation of non-crystalline phases occurred in air. The differential thermal analysis (DTA) profile in nitrogen revealed events at T = 247 °C, T = 297 °C (decomposition of CH3NH3SnxI3 systems into methylamine (CH3NH2), hydroiodic acid (HI) and SnI2), and in the range T = 342–373 °C (melting of SnI2) respectively. The thermal profile in air showed endothermic events at T = 139 °C and T = 259 °C with additional events at onset temperatures of T = 337 °C and T = 423 °C respectively which correspond to the formation of Sn(IV)-O binds and to the decomposition of methylamine. Static thermogravimetry analysis (TG), performed at T = 85 °C and T = 150 °C for t = 2 h, revealed a linear weight loss as a function of the time. The optical absorption spectra displayed absorbance edges in near infrared range, at 1107.0 nm (x = 0.9), 1098.6 nm (x = 1.0) and 1073.2 nm (x = 1.1) respectively.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Dimesso, L. ; Fasel, C. ; Lakus-Wollny, K. ; Mayer, T. ; Jaegermann, W. |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermal stability of lead-free CH3NH3SnxI3 systems (0.9 ≤ x ≤ 1.1) for photovoltaics |
| Sprache: | Englisch |
| Publikationsjahr: | September 2017 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials Science in Semiconductor Processing |
| Jahrgang/Volume einer Zeitschrift: | 68 |
| DOI: | 10.1016/j.mssp.2017.06.012 |
| URL / URN: | https://doi.org/10.1016/j.mssp.2017.06.012 |
| Kurzbeschreibung (Abstract): | Methylammonium-tin-iodide (MASnxI3, 0.9 ≤ x ≤ 1.1) systems were prepared by precipitation process in aqueous solutions. The “as prepared” MASnxI3 systems exhibited a tetragonal crystalline phase (space group I4cm) with polyhedral crystallites (length 50–400 µm). The as prepared samples were annealed at T = 150 °C for t = 8 h under nitrogen and synthetic air. Under nitrogen, the CH3NH3SnxI3 systems adopt nearly-cubic tetragonal structure (space group P4mm) with crystallites of 2–4 µm length whereas a degradation process with formation of non-crystalline phases occurred in air. The differential thermal analysis (DTA) profile in nitrogen revealed events at T = 247 °C, T = 297 °C (decomposition of CH3NH3SnxI3 systems into methylamine (CH3NH2), hydroiodic acid (HI) and SnI2), and in the range T = 342–373 °C (melting of SnI2) respectively. The thermal profile in air showed endothermic events at T = 139 °C and T = 259 °C with additional events at onset temperatures of T = 337 °C and T = 423 °C respectively which correspond to the formation of Sn(IV)-O binds and to the decomposition of methylamine. Static thermogravimetry analysis (TG), performed at T = 85 °C and T = 150 °C for t = 2 h, revealed a linear weight loss as a function of the time. The optical absorption spectra displayed absorbance edges in near infrared range, at 1107.0 nm (x = 0.9), 1098.6 nm (x = 1.0) and 1073.2 nm (x = 1.1) respectively. |
| Freie Schlagworte: | Methylammonium tin Iodide, Hybrid perovskite, Powder, Thermal Analysis, Annealing atmosphere |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 17 Jan 2018 11:38 |
| Letzte Änderung: | 30 Jul 2018 05:46 |
| PPN: | |
| Sponsoren: | The authors thank the Federal Ministry of Research and Development (BMBF) (Project “Perosol” Nr. 03SF0483B) for the financial support during this work. |
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