Li Ziyu, Gao Zhiyuan, Liu Lige, Zhang Kai, Ma Rui, Wang Yue, Yang Gaoling, Shi Kebin
State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, P. R. China.
MIIT Key Laboratory for Low Dimensional Quantum Structure and Devices, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.
Nano Lett. 2025 May 7;25(18):7410-7418. doi: 10.1021/acs.nanolett.5c00861. Epub 2025 Apr 23.
Perovskite quantum dots (PQDs) exhibit remarkable optical properties, making them highly promising for next-generation display technologies. However, achieving precise PQDs patterning is hindered by significant challenges, including the inability to achieve true three-dimensional (3D) structuring and the risk of damaging the delicate perovskite crystal lattice. Existing methods struggle to achieve true 3D structuring while preserving the optical integrity. This study introduces an in situ patterning technique using direct laser writing (DLW). By leveraging the nonlinear absorption properties of femtosecond lasers, thiol-Ene photopolymerization is triggered, transforming perovskite precursors into complex fluorescent structures. Unlike conventional methods, this precursor-based approach minimizes laser power requirements and prevents quantum dot degradation caused by high-energy exposure. It enables precise, scalable fabrication while maintaining the structural and optical stabilities of PQDs. This innovation provides a robust platform for developing advanced display technologies, optoelectronic devices, and miniaturized on-chip systems, paving the way for future high-performance applications.
钙钛矿量子点（PQDs）具有卓越的光学特性，这使其在下一代显示技术中极具潜力。然而，实现精确的PQDs图案化面临重大挑战，包括无法实现真正的三维（3D）结构化以及损坏脆弱的钙钛矿晶格的风险。现有方法在保持光学完整性的同时难以实现真正的3D结构化。本研究引入了一种使用直接激光写入（DLW）的原位图案化技术。通过利用飞秒激光的非线性吸收特性，引发硫醇-烯光聚合反应，将钙钛矿前驱体转化为复杂的荧光结构。与传统方法不同，这种基于前驱体的方法将激光功率要求降至最低，并防止了高能曝光导致的量子点降解。它能够在保持PQDs结构和光学稳定性的同时实现精确、可扩展的制造。这一创新为开发先进的显示技术、光电器件和微型片上系统提供了一个强大的平台，为未来的高性能应用铺平了道路。
