# Perovskite Dielectric Constants Repository

Raw data and derived dielectric constants (*n*, *k*, α) associated with our publication (DOI will be added to GitHub when available; the ORA version may be immutable, in which case please look for the paper). **Please cite our paper if you use these data.**

## I’m just here for *n* and *k* values... how do I get them?
- The *n* and *k* values can be found in two folders:
  - `.\Stitched_Not_Interpolated`
  - `.\Interpolated`
- The former contains *n* and *k* values only for the compositions we directly measured using ellipsometry, with the band edge measured using PDS or FTPS and stitched on.
- The `Interpolated` folder contains values for intermediate compositions derived using our interpolation scheme (see paper).
- Files are provided as CSV and Excel files, pandas DataFrames for easy ingestion into Python, and MAT files for easy ingestion into MATLAB.
  - MAT files load a data array and a column labels array.
- Included columns are: `'n'`, `'k'`, and `'alpha'`.

## Full description
- This repository contains raw data, processed dielectric constants, and the processing code used to derive them for:
  - FA–Cs–based near-Pb compositions with Br content ranging from 0% to 100%
  - MA–FA–based Pb–Sn compositions with Sn content ranging from 0% to 60%

- Included are:
  - Raw VASE ellipsometry data
  - Raw PDS data for neat Pb compositions
  - Raw FTPS data for mixed Pb–Sn compositions
  - Derived dielectric constants (interpolated and non-interpolated)

- Jupyter notebooks are provided that walk through how each raw dataset is processed and plotted in a visually understandable way.
- Reading through these notebooks will help visualize the raw data and clarify the naming conventions.
- The stitching and interpolation code is provided in a separate notebook.
- The notebooks are also saved as PDFs for easy viewing.
