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Updated: Nov 22, 2025
Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy
Published on: July 28, 2020
Nanoscale light- and voltage-induced lattice strain in perovskite thin films
Haian Qiu1, Jeffrey M Mativetsky1
1Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, USA. jmativet@binghamton.edu.
Abstract:
We report on localized nonlinear lattice deformation and nanoscale structural rearrangement in methylammonium lead triiodide films triggered by the combined action of light and voltage. These effects, revealed by second harmonic piezoresponse force microscopy, are connected with organic cation motion, implicating localized cation migration as a key contributor to perovskite optoelectronic device instability under operating conditions.
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