Optical Properties of Organic Inorganic Metal Halide Perovskite for Photovoltaics
| Autor: | A.R. Lamichhane, Ebin Bastola, Khagendra P. Bhandari, Travis Maenle, Randy J. Ellingson |
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| Rok vydání: | 2019 |
| Předmět: |
Spin coating
Materials science Analytical chemistry Halide 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology medicine.disease_cause 01 natural sciences 0104 chemical sciences Ellipsometry medicine Thin film 0210 nano-technology Refractive index Ultraviolet Perovskite (structure) |
| Zdroj: | 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC). |
| DOI: | 10.1109/pvsc40753.2019.8981333 |
| Popis: | We have described the use of the Kramers-Kronig method for the analysis of reflectance spectra. Using this method, we have reported the optical and dielectric properties of organic-inorganic metal halide perovskite thin films. We prepared thin films by spin coating a mixture of PbI 2 and MAI dissolved in DMF and DMSO in 4:1 volume ratio. We measured energy (or wavelength) dependent reflectance spectra R(v) of thin films using UV/Vis/NIR spectrophotometer. We also calculated phase of reflected waves (θ(v)) using Kramers-Kronig dispersion relation. Finally, using θ(v)and R(v), we investigated optical and dielectric constants as well as absorption coefficient in UV/Vis/NIR spectral region. In our study, we found that n(v) and e 1 (v)follow similar pattern to that of R(v). Three oscillators in k(v) and e 2 (v)are found similar to the ones obtained from ellipsometry study. As expected, α(v) calculated from R(v)are very high of the order of 105 cm-1 in the visible and ultraviolet regions. |
| Databáze: | OpenAIRE |
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