Nanoscale phase impurities lead to instabilities in halide perovskite devices
Samuel Stranks a
a University of Cambridge, JJ Thomson Avenue, Cambridge, United Kingdom
Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Spring Meeting 2022 (NSM22)
#PeroSolarFab22. Perovskite solar cells: on the way from the lab to fab
Online, Spain, 2022 March 7th - 11th
Organizers: Yulia Galagan, Eugene Katz and Pavel Troshin
Invited Speaker, Samuel Stranks, presentation 127
DOI: https://doi.org/10.29363/nanoge.nsm.2022.127
Publication date: 7th February 2022

Halide perovskite solar cells are on the brink of commercialisation with exciting efficiency trajectories for both single junction and tandem configurations. Critical to their commercial success is demonstration of long-term stability, yet our fundamental understanding of failure modes is still lacking. Here, I will show our recent work investigating how nanoscale heterogeneity plays a key role in performance and stability [1]. I will show how nanoscale phase impurities, even at trace levels, lead to carrier traps [2] and critical photo-instabilities in devices. Finally, I will show how phase engineering will be essential to remove these problematic inclusions, ultimately leading to extremely phase and operational stable halide perovskite absorbers and devices.  

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