Photoinduced Transition from Quasi-Two-Dimensional
Ruddlesden–Popper to Three-Dimensional Halide Perovskites for
the Optical Writing of Multicolor and Light-Erasable Images
posted on 2024-01-10, 16:06authored bySergey
S. Anoshkin, Ivan I. Shishkin, Daria I. Markina, Lev S. Logunov, Hilmi Volkan Demir, Andrey L. Rogach, Anatoly P. Pushkarev, Sergey V. Makarov
Optical
data storage, information encryption, and security labeling
technologies require materials that exhibit local, pronounced, and
diverse modifications of their structure-dependent optical properties
under external excitation. Herein, we propose and develop a novel
platform relying on lead halide Ruddlesden–Popper phases that
undergo a light-induced transition toward bulk perovskite and employ
this phenomenon for the direct optical writing of multicolor patterns.
This transition causes the weakening of quantum confinement and hence
a reduction in the band gap. To extend the color gamut of photoluminescence,
we use mixed-halide compositions that exhibit photoinduced halide
segregation. The emission of the films can be tuned across the range
of 450–600 nm. Laser irradiation provides high-resolution direct
writing, whereas continuous-wave ultraviolet exposure is suitable
for recording on larger scales. The luminescent images created on
such films can be erased during the visualization process. This makes
the proposed writing/erasing platform suitable for the manufacturing
of optical data storage devices and light-erasable security labels.