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Laser-Induced Fabrication of Multicolor Perovskite Quantum Dot Patterns with Multiple Information Encryption Modes
Qiurui Zhang1, Juqing Li1, Zhichao Yu1
1Shien-Ming Wu School of Intelligent Engineering, South China University of Technology, Guangzhou, Guangdong 511442, China.
ACS Applied Materials & Interfaces
|February 19, 2025
Summary
Researchers developed a laser-induced technology to create multicolor metal halide perovskite quantum dot (MHP QD) patterns for information encryption. This method enables reversible photoluminescence for advanced anticounterfeiting and data storage applications.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Patterned metal halide perovskite quantum dots (MHP QDs) are crucial for novel optoelectronic applications.
- Developing precise fabrication methods for MHP QDs is essential for advanced functionalities.
Purpose of the Study:
- To develop a laser-induced technology for fabricating multicolor MHP QD patterns.
- To explore the potential of these patterns in information encryption and data storage.
Main Methods:
- A femtosecond laser was used to induce localized ionic transport and reaction between precursor layers (PbBr2 and CsBr) for precise CsPbBr3 QD synthesis.
- The environmental lability of perovskites was utilized for reversible photoluminescence (PL) control.
Main Results:
- Multicolor MHP QD patterns were successfully fabricated using the laser-induced technology.
- Reversible elimination and recovery of PL emission were achieved through moisture treatment and in situ laser scanning, attributed to CsPbBr3/CsPb2Br5 phase transformation.
- Color tuning of MHP QDs was demonstrated by adjusting precursors.
Conclusions:
- The developed laser-induced technology offers a flexible method for fabricating patterned MHP QDs with tunable colors.
- The reversible PL behavior holds significant promise for applications in information encryption, anticounterfeiting, and optical data storage.
