Affiliation:
1. School of Physics and Optoelectronic Engineering Anhui University Hefei Anhui 230601 P. R. China
2. Information Materials and Intelligent Sensing Laboratory of Anhui Province Anhui University Hefei Anhui 230601 P. R. China
3. Key Laboratory of Opto‐Electronic Information Acquisition and Manipulation of Ministry of Education Anhui University Hefei Anhui 230601 P. R. China
Abstract
AbstractPerovskites have gained widespread attention across various fields such as photovoltaics, displays, and imaging. Despite their promising applications, achieving precise and high‐quality patterning of perovskite films remains a challenge. In this study, femtosecond laser direct writing technology is utilized to achieve rapid and highly precise micro/nanofabrication on perovskites. The study successfully fabricates multiple structured and emission‐tunable perovskite patterns composed of A2(FA)n−1PbnX3n+1 (A represents a series of long‐chain amine cations, and X = Cl, Br, I), encompassing 2D, quasi‐2D, and 3D structures. The study delves into the intricate interplay between fabrication technology and the growth of multi‐dimensional perovskites: higher repetition rates, coupled with appropriate laser power, prove more conducive to perovskite growth. By employing precise halogen element design, the simultaneous generation of two distinct color quick‐response (QR) code patterns is achieved through one‐step laser processing. These mirrored QR codes offer a novel approach to anti‐counterfeiting. To further enhance anti‐counterfeiting capabilities, artificial intelligence (AI)‐based methods are introduced for recognizing patterned perovskite anti‐counterfeiting labels. The combination of deep learning algorithms and a non‐deterministic manufacturing process provides a convenient means of identification and creates unclonable features. This integration of materials science, laser fabrication, and AI offers innovative solutions for the future of security features.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Anhui Province
Cited by
1 articles.
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