The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Ivan Scheblykin. Portrait.

Ivan Scheblykin

Professor

Ivan Scheblykin. Portrait.

Unveiling the Local Fate of Charge Carriers in Halide Perovskite Thin Films via Correlation Clustering Imaging

Author

  • Sudipta Seth
  • Boris Louis
  • Koki Asano
  • Toon Van Roy
  • Maarten B.J. Roeffaers
  • Elke Debroye
  • Ivan G. Scheblykin
  • Martin Vacha
  • Johan Hofkens

Summary, in English

As the field of metal halide perovskites matures, a range of compositionally different perovskite films has found a place in efficient optoelectronic devices. These films feature variable local structural stability, carrier diffusion, and recombination, while there is still a lack of easy-to-implement generic protocols for high-throughput characterization of these variable properties. Correlation clustering imaging (CLIM) is a recently developed tool that resolves peculiarities of local photophysics by assessing the dynamics of photoluminescence detected by wide-field optical microscopy. We demonstrate the capability of CLIM as a high-throughput characterization tool of perovskite films using MAPbI3 (MAPI) and triple cation mixed halide (TCMH) perovskites as examples where it resolves the interplay of carrier diffusion, recombination, and defect dynamics. We found significant differences in the appearance of metastable defect states in these two films. Despite a better surface quality and larger grain size, MAPI films showed more pronounced effects of fluctuating defect states than did TCMH films. As CLIM shows a significant difference between materials known to lead to different solar cell efficiencies, it can be considered a tool for quality control of thin films for perovskite optoelectronic devices.

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • LTH Profile Area: Photon Science and Technology
  • LU Profile Area: Light and Materials

Publishing year

2025-04-28

Language

English

Pages

244-252

Publication/Series

Chemical and Biomedical Imaging

Volume

3

Issue

4

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Condensed Matter Physics (including Material Physics, Nano Physics)
  • Materials Chemistry

Keywords

  • functional imaging
  • halide perovskites
  • local photophysics
  • metastable defects
  • Structure−function relationship

Status

Published

ISBN/ISSN/Other

  • ISSN: 2832-3637