Photovoltaic properties of a triple cation methylammonium/formamidinium/phenylethylammonium tin iodide perovskite

Rath, Thomas; Handl, Jasmin; Weber, Stefan; Friesenbichler, Bastian; Fürk, Peter; Troi, Lukas; Dimopoulos, Théodoros; Kunert, Birgit; Resel, Roland; Trimmel, Gregor

doi:10.1039/c9ta02835h

Cited by 33 publications

(26 citation statements)

References 33 publications

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“…[51][52][53] In this work, the device stabilityi se valuated with al ight-soakingt est in ambient air under continuous simulated solar AM 1.5 Gi llumination, resulting in as teady sample temperatureo fa pproximately 50 8C ( Figure 7b). Considerable efforts have been made to improve the devices tabilityo ft in and lead-free PSCs.…”

Section: Resultsmentioning

confidence: 98%

“…Considerable efforts have been made to improve the devices tabilityo ft in and lead-free PSCs. [51][52][53] In this work, the device stabilityi se valuated with al ight-soakingt est in ambient air under continuous simulated solar AM 1.5 Gi llumination, resulting in as teady sample temperatureo fa pproximately 50 8C ( Figure 7b). The controlF ASnI 3 device withoutP EABr treatment showedasharp degradation and failed after 140 h light soaking.…”

Section: Resultsmentioning

confidence: 99%

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Efficient and Stable FASnI₃ Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer

et al. 2019

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The promising tin perovskite solar cells (PSCs) suffer from the oxidation of Sn2+ to Sn4+, leading to a disappointing conversion efficiency along with poor stability. In this work, phenylethylammonium bromide (PEABr) was employed to form an ultrathin, low‐dimensional perovskite layer on the surface of the FASnI3 (FA=formamidinium) absorber film to improve the interface of perovskite/PCBM ([6,6]‐phenyl‐C61‐butyricacid methyl) in the inverted planar device structure of the ITO (indium‐doped tin oxide)/PEDOT:PSS [poly(3,4‐ethylenedioxythiophene)/polystyrene sulfonate]/perovskite/[6,6]‐phenyl‐C61‐butyricacid methyl (PCBM)/BCP (2,9‐dimethyl‐4,7‐diphenyl‐1,10‐phenanthroline) electrode. The device efficiency was enhanced from 4.77 to 7.86 % by this PEABr treatment. A series of characterizations proved that this modification could improve the crystallinity of the FASnI3 perovskite by incorporating Br and forming an ultrathin, low‐dimensional perovskite layer at the interface, which led to the effective suppression of Sn2+ oxidation, improved band level alignment, and decreased defect density. These effects contributed to the clear enhancement of conversion efficiency. Moreover, this treatment also led to remarkably enhanced device stability, with approximately 80 % of the initial efficiency retained after 350 h light soaking, whereas the control device failed within 140 h. This work deepens our understanding of the suppression effect of PEABr on the oxidation of Sn2+ and paves a new way to fabricate promising tin halide PSCs by facile interface engineering.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Efficient and Stable FASnI₃ Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer

et al. 2019

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“…The solar cells based on perovskites with a bromide content of x = 0 showed an efficiency of 2.97%. The PCE is lower compared to previously published values for solar cells with a MA 0.75 FA 0.15 PEA 0.1 SnI 3 absorber layer [20]. This originates from an intended simplification of the solar cell fabrication process by omitting an additional purification of the SnI 2 precursor and applying a single anti-solvent dripping instead of the two-step anti-solvent dripping procedure.…”

Section: Film Morphology and Solar Cellsmentioning

confidence: 57%

“…Additionally, 10 mol% SnF 2 was added to the solutions. It should be noted that SnI 2 (and all the other precursors) was used as purchased, which is in contrast to our previous study [20], where SnI 2 was additionally purified based on different boiling points of SnI 2 and SnI 4 to keep SnI 4 impurities as low as possible. The precursor solutions were stirred overnight at room temperature under nitrogen atmosphere, followed by filtration through a 0.45 µm PTFE filter.…”

Section: Thin Film and Solar Cell Fabricationmentioning

confidence: 99%

“…Promising solar cells with FA and PEA ions have already been fabricated and efficiencies of 5.94% [11] and 9.0% [15] were obtained. In our previous study, we have shown that solar cells with the triple cation perovskite MA 0.75 FA 0.15 PEA 0.1 SnI 3 exhibit an excellent shelf life of more than 5000 h and also remarkable stability under operation [20].…”

Section: Introductionmentioning

confidence: 99%

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Dependence of material properties and photovoltaic performance of triple cation tin perovskites on the iodide to bromide ratio

et al. 2019

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In this work, the influence of a partial introduction of bromide (x = 0-0.33) into MA 0.75 FA 0.15 PEA 0.1 Sn(Br x I 1−x) 3 (MA: methylammonium, FA: formamidinium, PEA: phenylethylammonium) triple cation tin perovskite on the material properties and photovoltaic performance is investigated and characterized. The introduction of bromide shifts the optical band gap of the perovskite films from 1.29 eV for the iodide-based perovskite to 1.50 eV for the perovskite with a bromide content of x = 0.33. X-ray diffraction measurements reveal that the size of the unit cell is also gradually reduced based on the incorporation of bromide. Regarding the photovoltaic performance of the perovskite films, it is shown that already small amounts of bromide (x = 0.08) in the perovskite system increase the open circuit voltage, short circuit current density and fill factor. The maximum power conversion efficiency of 4.63% was obtained with a bromide content of x = 0.25, which can be ascribed to the formation of homogeneous thin films in combination with higher values of the open circuit voltage. Upon introduction of a higher amount of bromide (x = 0.33), the perovskite absorber layers form pinholes, thus reducing the overall device performance.

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Tin Halide Perovskites: From Fundamental Properties to Solar Cells

et al. 2021

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Metal halide perovskites have unique optical and electrical properties, which make them an excellent class of materials for a broad spectrum of optoelectronic applications. However, it is with photovoltaic devices that this class of materials has reached the apotheosis of popularity. High power conversion efficiencies are achieved with lead‐based compounds, which are toxic to the environment. Tin‐based perovskites are the most promising alternative because of their bandgap close to the optimal value for photovoltaic applications, the strong optical absorption, and good charge carrier mobilities. Nevertheless, the low defect tolerance, the fast crystallization, and the oxidative instability of tin halide perovskites currently limit their efficiency. The aim of this review is to give a detailed overview of the crystallographic, photophysical, and optoelectronic properties of tin‐based perovskite compounds in their multiple forms from 3D to low‐dimensional structures. At the end, recent progress in tin‐based perovskite solar cells are reviewed, mainly focusing on the detail of the strategies adopted to improve the device performances. For each subtopic, the current challenges and the outlook are discussed, with the aim to stimulate the community to address the most important issues in a concerted manner.

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Photovoltaic properties of a triple cation methylammonium/formamidinium/phenylethylammonium tin iodide perovskite

Abstract: Solar cells based on the novel triple cation tin perovskite MA0.75FA0.15PEA0.1SnI3 exhibit PCEs of 5.0% and notably good stability over more than 5000 hours.

Cited by 33 publications

References 33 publications

Efficient and Stable FASnI₃ Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer

Efficient and Stable FASnI₃ Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer

Dependence of material properties and photovoltaic performance of triple cation tin perovskites on the iodide to bromide ratio

Tin Halide Perovskites: From Fundamental Properties to Solar Cells

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Photovoltaic properties of a triple cation methylammonium/formamidinium/phenylethylammonium tin iodide perovskite

Abstract: Solar cells based on the novel triple cation tin perovskite MA0.75FA0.15PEA0.1SnI3 exhibit PCEs of 5.0% and notably good stability over more than 5000 hours.

Cited by 33 publications

References 33 publications

Efficient and Stable FASnI3 Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer

Efficient and Stable FASnI3 Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer

Dependence of material properties and photovoltaic performance of triple cation tin perovskites on the iodide to bromide ratio

Tin Halide Perovskites: From Fundamental Properties to Solar Cells

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Efficient and Stable FASnI₃ Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer

Efficient and Stable FASnI₃ Perovskite Solar Cells with Effective Interface Modulation by Low‐Dimensional Perovskite Layer