Abstract
Terahertz (THz) Spectroscopy offers a novel approach to probing low-energy phonon excitation in complex crystalline materials like methylammonium lead iodide (MAPI) perovskite films. In this research, we use time-resolved Terahertz Spectroscopy in tandem with a three-oscillator model to non-destructively ascertain the relative volumetric composition of MAPI and residual lead iodide (PbI₂) in spin-coated films. The dielectric function is modeled as a product over longitudinal and transverse optical phonon modes. This model is then fitted to the measured THz spectra, allowing us to extract the contributions from both MAPI and PbI₂.
Recommended Citation
Kisker, Isaac J.C
(2025)
"Non-Destructive Compositional Analysis of Lead Halide Perovskite Films Using THz Spectroscopy and a Three-Oscillator Dielectric Model,"
Macalester Journal of Physics and Astronomy: Vol. 13:
Iss.
1, Article 6.
Available at:
https://digitalcommons.macalester.edu/mjpa/vol13/iss1/6