Laser-Induced Fabrication of Multicolor Perovskite Quantum Dot Patterns with Multiple Information Encryption Modes

induced by the repeated laser irradiation and moisture treatment and is promising for applications in information encryption, anticounterfeit, and optical data storage. Furthermore, MHP patterns with multiple color emissions are synthesized by adjusting the precursors, demonstrating the flexibility of the developed technology in color tuning of MHP QDs.