期刊
MATERIALS RESEARCH EXPRESS
卷 7, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/ab5c46
关键词
CH3NH3PbI3-xClx film; co-evaporation; transmittance and reflectance spectra; optical parameters; envelope method
资金
- RA MES State Committee of Science
The complete set of optical parameters of micron-sized polycrystalline CH3NH3PbI3-xClx films deposited by the vacuum co-evaporation of lead iodide and methylammonium chloride is determined by analysis of oscillating optical transmittance and reflectance spectra in the wavelength range 400-1000 nm. It is shown that for a medium and weak absorption region the envelope method is valid for the extraction of refractive index, extinction and absorption coefficient when is using only transmittance spectra. As well thickness of the film is determined from transmittance and reflectance spectra with interference-effect. The absorption coefficient for the strong absorption region and optical band gap (direct transition at E-opt = 1.62 eV) are calculated based on transmittance and reflectance spectra by using conventional approximated formulas.
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