Complex optical constants of CsPbCI3 perovskite thin films determined by spectroscopic ellipsometry

🎉Congratulations to Sana Khan and the Perovskite Optoelectronics Group at AMO GmbH on their recent publication in APL Energy! 🎉

In this study, the team reports the optical constants of CsPbCl₃ perovskite thin films, determined via spectroscopic ellipsometry.
Using a model based on Tauc–Lorentz and harmonic oscillators, they identified:

➡️A sharp absorption edge at 411 nm
➡️An optical bandgap of ~2.99 eV.

These findings provide valuable insights for the development of wide-bandgap perovskite optoelectronics.

Sana Khan, Piotr Jacek Cegielski, Manuel Runkel, Thomas Riedl, Maryam Mohammadi, Max Lemme, “Complex optical constants of CsPbCl3 perovskite thin films determined by spectroscopic ellipsometry Open Access”, APL Energy 3, 026108 (2025).