Starting materials: 3TI, SnI2, MAI, HI, H3PO2, ethanol
Product: Single crystals of 2D tin halide perovskites. Thin flakes were then exfoliated from the single crystals.
Description: Single crystals synthesized by slow cooling method. Growth solution prepared with 0.005mmol 3TI, 1.006mmol MAI, 0.03mmol SnI2, 0.2mL HI, 0.1mL H3PO2, and 0.5mL ethanol in a sealed glass vial and placed in a muffle furnace and heated until completely dissolved. Solution cooled to room temperature at a rate of 2°C/hour. Crystals were then dried and stored in a nitrogen glove box.
Method: Photoluminescence spectroscopy
Description: Samples excited with mercury fluorescence light source (C-LHGFI HG LAMP). The flourescence filter cube contains a bandpass filter from 330-385 nm for excitation, a dichroic mirror with a cutoff wavelength of 400nm for light splitting, and a long pass filter of 410nm for emission. PL spectra were collected by Princeton Instruments spectrometer (HRS-300S).
Crystal system: unknown
Interlayer Distance, Inorganic-to-Inorganic, Å |
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Starting materials: 3TI, SnI2, MAI, HI, H3PO2, ethanol
Product: Single crystals of 2.5D tin halide perovskite. Thin flakes were then exfoliated from the single crystals.
Description: Single crystals synthesized by slow cooling method. Growth solution prepared with 0.005mmol 3TI, 1.006mmol MAI, 0.03mmol SnI2, 0.2mL HI, 0.1mL H3PO2, and 0.5mL ethanol in a sealed glass vial and placed in a muffle furnace and heated until completely dissolved. Solution cooled to room temperature at a rate of 2°C/hour. Crystals were then dried and stored in a nitrogen glove box.
Method: Powder X-ray Diffraction
Description: Performed using Bruker D8 Advance, using copper target and steps of 0.02 degrees.
Comment: Temperature not confirmed in paper; room temperature seems likely.
Crystal system: unknown
Exciton binding energy, meV |
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Starting materials: 3TI, SnI2, MAI, HI, H3PO2, ethanol
Product: Single crystals of 2D tin halide perovskites. Thin flakes were then exfoliated from the single crystals.
Description: Single crystals synthesized by slow cooling method. Growth solution prepared with 0.005mmol 3TI, 1.006mmol MAI, 0.03mmol SnI2, 0.2mL HI, 0.1mL H3PO2, and 0.5mL ethanol in a sealed glass vial and placed in a muffle furnace and heated until completely dissolved. Solution cooled to room temperature at a rate of 2°C/hour. Crystals were then dried and stored in a nitrogen glove box.
Method: Arrhenius formula fitting
Description: Temperature dependent PL measurements were conducted by combining a Linkam THMS600 stage with the Witec system. Air was purged from stage chamber with dry nitrogen to remove water and oxygen. Cooling rate set to 20 degrees Celsius/min. 50x objective lens used for signal collecting. Exciton binding energies extracted from Arrhenius formula fitting from the integrated PL intensity.