Novel Method for Measuring Carrier Diffusion Lengths in Metal-Halide Perovskites

authored by: Benjamin Grimm, Verena Steckenreiter, Annika Raugewitz, Felix Haase, Rolf Brendel, Robby Peibst, Jan Schmidt
Abstract: Herein, it is demonstrated that the carrier diffusion lengths in metal-halide perovskite films can be estimated from contactless quasi-steady-state photoconductance measurements applying an approximate analysis. The approach to metal-halide perovskite layers of different compositions is applied, which is fabricated by wet-chemical processing and coevaporation. The extracted diffusion lengths are in the order of several micrometers for both examined perovskite layers and hence sufficiently large, i.e., much larger than the film thickness, to process high-efficiency solar cells from them. The presented analysis provides a useful and easy-to-apply methodology for the fast assessment of the electronic quality of metal-halide perovskite layers in the lab, without the need of complete solar cell processing.
Organisation(s): Solar Energy Section
Institute of Solid State Physics
External Organisation(s): Institute for Solar Energy Research (ISFH)
Type: Article
Journal: Physica Status Solidi - Rapid Research Letters
ISSN: 1862-6254
Publication date: 10.03.2025
Publication status: Accepted/In press
Peer reviewed: Yes
ASJC Scopus subject areas: General Materials Science, Condensed Matter Physics
Electronic version(s): https://doi.org/10.1002/pssr.202400386 (Access: Open)

BibTeX

@article{5b15b93126bf49eebff59ee4446ad876,
title = "Novel Method for Measuring Carrier Diffusion Lengths in Metal-Halide Perovskites",
abstract = "Herein, it is demonstrated that the carrier diffusion lengths in metal-halide perovskite films can be estimated from contactless quasi-steady-state photoconductance measurements applying an approximate analysis. The approach to metal-halide perovskite layers of different compositions is applied, which is fabricated by wet-chemical processing and coevaporation. The extracted diffusion lengths are in the order of several micrometers for both examined perovskite layers and hence sufficiently large, i.e., much larger than the film thickness, to process high-efficiency solar cells from them. The presented analysis provides a useful and easy-to-apply methodology for the fast assessment of the electronic quality of metal-halide perovskite layers in the lab, without the need of complete solar cell processing.",
keywords = "charge carrier lifetimes, diffusion lengths, perovskites, quasi-steady-state photoconductance, solar cells",
author = "Benjamin Grimm and Verena Steckenreiter and Annika Raugewitz and Felix Haase and Rolf Brendel and Robby Peibst and Jan Schmidt",
note = "Publisher Copyright: {\textcopyright} 2025 The Author(s). physica status solidi (RRL) Rapid Research Letters published by Wiley-VCH GmbH.",
year = "2025",
month = mar,
day = "10",
doi = "10.1002/pssr.202400386",
language = "English",
journal = "Physica Status Solidi - Rapid Research Letters",
issn = "1862-6254",
publisher = "Wiley-VCH Verlag",
}