Crystal system: tetragonal
| Band gap (optical, integrating sphere), eV |
|---|
Starting materials: Methylamine (CH3NH2), (HI) 57 wt % in water, PbI2
Product: MAPbI3 film
Description: React ~24 mL methylamine (CH3NH2) solution 33 wt% in absolute ethanol with ~10 mL hydroiodic acid (HI) 57 wt % in water with excess methylamine under nitrogen atmosphere in ~100 mL ethanol at room temperature. Crystallize methylammonium iodide (CH3NH3I) using a rotary evaporator to form a white colored powder. Prepare MAPbI3 precursor by dissolving equimolar amounts of methylammonium iodide and PbI2 in DMF at 0.88M in a nitrogen-filled glovebox. Spin-coat film at 2000rpm and anneal at 100 °C for 5 minutes in the glovebox.
Method: Optical absorption
Description: Transmittance and reflectance spectra were collected with a Varian Cary 300 UV-Vis spectrophotometer with an internally coupled integrating sphere. Estimated band gap was determined from the extrapolation of the linear region to the energy-axis intercept in the direct bandgap Tauc plot.
See all entries for this property (3 total)
Starting materials: Methylamine (CH3NH2), (HI) 57 wt % in water, PbI2
Product: MAPbI3 film
Description: React ~24 mL methylamine (CH3NH2) solution 33 wt% in absolute ethanol with ~10 mL hydroiodic acid (HI) 57 wt % in water with excess methylamine under nitrogen atmosphere in ~100 mL ethanol at room temperature. Crystallize methylammonium iodide (CH3NH3I) using a rotary evaporator to form a white colored powder. Prepare MAPbI3 precursor by dissolving equimolar amounts of methylammonium iodide and PbI2 in DMF at 0.88M in a nitrogen-filled glovebox. Spin-coat film at 2000rpm and anneal at 100 °C for 5 minutes in the glovebox.
Method: Optical absorption
Description: Transmittance and reflectance spectra were collected with a Varian Cary 300 UV-Vis spectrophotometer with an internally coupled integrating sphere.