Solar Cell Capacitance Simulator (SCAPS-1D) is a widely respected 1D simulation tool developed by Marc Burgelman and his team at Ghent University, Belgium

To recap:

Step 4: Download and Extract

Click the link provided. You will typically download a file named something like SCAPS_version_3.7.0.zip.
Use the provided password to extract the contents to a folder on your local drive (e.g., C:\SCAPS). Do not run the program from within the zip folder.

Researchers use it to model how different layers, thicknesses, and doping concentrations affect efficiency, fill factor, and open-circuit voltage. How to Find the Official SCAPS-1D Download Link

Understanding the Licensing and Distribution Model

Before searching for a download link, it is crucial to understand how SCAPS-1D is distributed. You cannot simply click a public download link on a random file-sharing website.