Long-lived photoinduced polar states in metal halide perovskites

Yixuan Dou, Xiaoming Wang, Nicholas W. G. Smith, Piush Behera, Rathsara Herath Mudiyanselage, Burak Guzelturk, Donald A. Walko, Yannick Pleimling, Sunhao Liu, Nicholas Nici, Carla Slebodnick, Bogdan Dryzhakov, Bin Hu, Archana Raja, Ramamoorthy Ramesh, Giti A. Khodaparast (), Yanfa Yan () and Lina Quan ()
Additional contact information
Yixuan Dou: Virginia Tech
Xiaoming Wang: University of Toledo
Nicholas W. G. Smith: Virginia Tech
Piush Behera: University of California
Rathsara Herath Mudiyanselage: Virginia Tech
Burak Guzelturk: Argonne National Laboratory
Donald A. Walko: Argonne National Laboratory
Yannick Pleimling: Virginia Tech
Sunhao Liu: Virginia Tech
Nicholas Nici: Virginia Tech
Carla Slebodnick: Virginia Tech
Bogdan Dryzhakov: University of Tennessee
Bin Hu: University of Tennessee
Archana Raja: Lawrence Berkeley National Laboratory
Ramamoorthy Ramesh: University of California
Giti A. Khodaparast: Virginia Tech
Yanfa Yan: University of Toledo
Lina Quan: Virginia Tech

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract Ferroic polarization in hybrid perovskites is crucial for enhancing photovoltaic performance and developing potential electronic applications. Controlling ferroic polarization with an optical field enables probing of ferroic polarization without the unwanted interface ionic effects caused by electronic contacts. This study employs ultrafast near-infrared photoexcitation to control dynamic structural transitions in soft single crystalline hybrid Cu (II) halide perovskites, achieving a long-lived polar state (beyond 104 s) at room temperature. We probe reversible long-lived polar domains under near-infrared photoexcitation using in-situ second harmonic generation microscopy. Theoretical calculation informs the polar lattice microstrain likely induced by anisotropic structure deformation in octahedral copper halide under near-infrared photoexcitation. The reversible slow structure deformation is further confirmed by in-situ photo-induced X-ray diffraction measurement. This work provides a material platform for understanding, controlling, and probing polarization under photoexcitation. Our methodology enables the identification of previously undiscovered polar phases in ferroelectric halide perovskites.

Date: 2025
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DOI: 10.1038/s41467-025-60007-w

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