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Se4+-Doped Indium-Based Perovskites via NaCl-Driven Structural Transformation for Dynamic Luminescence Modulation in
Ying Zhao1, Shaolong Liu1, Huanyu Chen1
1School of Physics, University of Electronic Science and Technology of China, Chengdu611731, China.
ACS Applied Materials & Interfaces
|August 13, 2026
Summary
Researchers developed a new indium-based perovskite material that changes color continuously with mild stimuli. This innovation offers advanced anti-counterfeiting solutions by enabling dynamic, tunable optical security features.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Optoelectronics
Background:
- Increasing counterfeiting and data security threats necessitate advanced optical materials.
- Existing stimuli-responsive materials often lack continuous color change or require harsh triggers.
Purpose of the Study:
- To develop a facile luminescence modulation strategy for indium-based perovskites.
- To achieve continuous color evolution using mild stimuli for anti-counterfeiting and information encryption.
Main Methods:
- Employing Se4+ as a luminescent modulator in Cs2InCl5·H2O.
- Inducing a 0D-to-3D phase transition triggered by NaCl.
- Fabricating functional ink into patterned films via screen printing.
Main Results:
- Achieved continuous emission color evolution from orange-red to green via a mild NaCl-triggered phase transition.
- Demonstrated tunable emission colors and response kinetics by adjusting NaCl concentration and temperature.
- Successfully implemented a multi-level optical encryption design with three-stage information readout.
Conclusions:
- Established a mild, phase-transition-driven luminescence evolution approach for indium-based perovskites.
- The Se4+ modulated material provides a versatile platform for continuous dynamic color evolution.
- The developed material shows significant potential for advanced anti-counterfeiting and information encryption applications.
