Crystal system: unknown
| Band gap (optical, integrating sphere), eV |
|---|
Starting materials: CsI, PbI2, dimethyl sulfoxide
Product: CsPbI3 film
Description: Equimolar amounts of CsI and PbI2 were dissolved in dimethyl sulfoxide at 0.6M, in a nitrogen-filled glovebox. Films were spin-coated at 2000rpm and annealed at 100 degrees 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.