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Domain-Confined Perovskite in Lanthanide MOFs for Multiresponse CPL Switches and Information Encryption
Mengchen Li1, Mengqi Li1, Xinxin Liu1
1State Key Laboratory of Advanced Materials for Intelligent Sensing, Ministry of Science and Technology & Key Laboratory of Organic Integrated Circuit, Ministry·of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China.
Researchers developed a novel solid-state circularly polarized luminescence (CPL) switch using chiral coassembled materials. This breakthrough enables advanced optical switching for next-generation information technologies.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Circularly polarized luminescence (CPL) switches are crucial for advanced information technologies.
- Developing solid-state multiresponse CPL switches presents significant challenges.
Purpose of the Study:
- To synthesize a novel chiral coassembled material for solid-state CPL switching.
- To investigate the photophysical properties and switching behaviors of the synthesized material.
Main Methods:
- Host-guest space-confined strategy using lanthanide metal-organic frameworks (MOFs) as hosts and perovskite quantum dots (QDs) as guests.
- Self-assembly of MAPbX3@L/d-Phe-LnMOF (Ln = Eu3+, Tb3+; MA = CH3NH3+; X = Cl-, Br-, I-).
- Characterization of photoluminescence quantum yield (PLQY), fluorescence lifetime, thermal stability, and photoswitching properties.
Main Results:
- The nonchiral MAPbX3 inherited chirality from the MOFs via host-guest ligand bonds.
- The material exhibited long-term PLQY (~11%), enhanced fluorescence lifetime, and good thermal stability.
- Reversible CPL switching was achieved using chemical stimuli (H2O/MABr solution) based on dual chiral emission centers.
Conclusions:
- A new method for preparing solid-state CPL composites was established.
- The developed material shows potential for CPL-based optical switches.
- This work expands applications for advanced optical switching materials.
