Crystal system: unknown
| Photoluminescence peak position, abs. units |
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Starting materials: HI (1.1eq), 1.0 mol/L solution of 2-thiopheneethylamine; PbI2
Product: Thin film of n=1 2D perovskite, characterized in paper but no unambiguous statement of thickness
Description: Synthesis of thiophene cations: HI (aq, 1.1eq) added dropwise to ethanol solution with thiophenealkylamine (1.0 eq) at 0 deg C. Solution gradually reached room temperature and poured into excess diethyl ether, forming precipitates that were then washed with Et2O. Salts were recrystallized from EtOH-Et2O mixtures. Synthesis of 2D perovskite films: Substrate indicated in original reference is FTO-coated glass was etched using zinc powder and HCl, then cleaned with Hellmanex, water, acetone, and 2-propanol. Perovskite precursor solution: dissolved thiophene alkylammonium and PbI2 (molar ratio 2:1) in DMF and DMSO (0.78:0.22 v/v mixed solvent). Further deposition details of the n=1 film remain unclear in the original reference.
Method: Photoluminescence spectroscopy
Description: Excitation wavelength: 450 nm. Measurement used a Fluorolog3-22 spectrofluorometer.