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Welcome to absorption_tauc_plot 👋

Twitter: AlekseiKrasnov4

Process UV-Vis absorption spectra, make Tauc transformation for direct/indirect allowed transition, extract band gap values for corresponding transition type, and plot figures

Prerequisites

This package requires:

Usage

absorption_processing should be used within a directory containing your raw txt files. The files could be with comma or space separatad values. These files should have the following format:

"Wavelength nm." "Abs."
X1 Y1
X2 Y2
 .  .
 .  .
 .  .

where Xi and Yi are the recorded wavelengths and absorption coefficients (Kubelka-Munk function), respectively. If you have reflectance data instead of absorption coefficients, the program will ask you and make the necessary Kubelka-Munk transformation.

Within the directory containing txt files, run:

absorption_processing.py

The program asks to specify the semiconductor type. Enter 0 for direct; 1 for indirect or if you do not have any information about the type of semiconductor. The program creates txt file with data in 5 columns: Wavelength (nm), Absorbance, Energy, eV, Direct transition, Indirect transition, for further plotting of the figures. The corresponding figures of the absorption spectra and Tauc plot for direct/indirect transition for each sample are generated. The band gap value for direct/indirect allowed transition will be extracted.

Other codes for Tauc transformation and band gap extraction

There are other codes that can make Tauc transformation and band gap extraction. The best code depends on your use case.

  • You may find taucauto for automatically extracting the bandgap of a material by the Tauc method.
  • A detailed explanation of the Tauc transformation process and band gap extraction could be found here Band Gap Calculation with Python.

Author

👤 Aleksei Krasnov

🤝 Contributing

Contributions, issues, and feature requests are welcome!
Feel free to check issues page.