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当前位置: 首页   >  课题组新闻   >  肖涵等人关于“超快激光打印在玻璃中实现绿-红双相钙钛矿量子点”的工作在Laser Photonics Reviews发表
肖涵等人关于“超快激光打印在玻璃中实现绿-红双相钙钛矿量子点”的工作在Laser Photonics Reviews发表
发布时间:2024-10-05

Ultrafast Laser Printing Green-Red Dual-Phase Perovskite Quantum Dots in Glass


Flexible regulation of local chemistry and band gap of perovskite quantum dots (PeQDs) is crucial for exploring their new functionalities and device applications. In this work, we report a strategy based on the combination of femtosecond (fs) laser-irradiation and thermal treatment to effectively manipulate chemical composition and emitting wavelength of PeQDs in amorphous glass. The engineering of ultrafast laser-induced thermal effect enables to induce in-situ nucleation/growth of dual-phase PeQDs within an individual glass matrix. By elevating heat-treatment (HT) temperature, I- ions are driven to surmount the diffusion barrier into the PeQDs lattice, leading to a tunable emission wavelength ranging from 613 nm to 647 nm. Besides, it is verified that the temperature-dependent diffusion rate of I- ions plays a pivotal role in affecting luminescent efficiency and color of the dual-phase glass. Finally, fs laser direct writing of multi-color patterns is presented, which provides a flexible method to develop new encryption/decryption technology for information security and anti-counterfeiting.


https://doi.org/10.1002/lpor.202401258