Cho Sangyeon, Yan Hao, Yun Seok Hyun
Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, Cambridge, Massachusetts, 02139, USA.
Current address: Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
Adv Opt Mater. 2025 May 5;13(13). doi: 10.1002/adom.202403316. Epub 2025 Jan 30.
Lead halide perovskites (LHP) are solution-processible semiconductor materials with high optical gain and broad wavelength tunability, making them well-suited for laser applications. Here, we present a solution-based method for the three-dimensional conformal coating of LHP microcrystals with noble metals. A nanoscale metal coating layer was found to significantly enhance both laser performance and environmental stability. This enabled gold-coated CsPbBr microcrystals to be delivered into live cells, achieving single-mode plasmonic lasing under optical pumping. Silver-coated CsPbBr particles demonstrated stable plasmonic lasing in air. This one-pot synthesis method opens new possibilities for leveraging LHPs to implant microlaser sources into physical, biological, and industrial systems.
卤化铅钙钛矿（LHP）是可通过溶液法加工的半导体材料，具有高光学增益和宽波长可调性，使其非常适合激光应用。在此，我们提出了一种基于溶液的方法，用于用贵金属对LHP微晶进行三维共形涂层。发现纳米级金属涂层可显著提高激光性能和环境稳定性。这使得金包覆的CsPbBr微晶能够被递送至活细胞中，在光泵浦下实现单模等离子体激光发射。银包覆的CsPbBr颗粒在空气中表现出稳定的等离子体激光发射。这种一锅合成方法为利用LHP将微激光源植入物理、生物和工业系统开辟了新的可能性。
