General Synthesis of Carbon Dot-Based Composites with Triple-Mode Luminescence Properties and High Stability
Ping Liang, Yihao Zheng, Fengru Liu, Huaiyu Shao, Chaofan Hu, Bingfu Lei, Xuejie Zhang, Xuejie Zhang, Yingliang Liu, Jianle Zhuang, Xingcai Zhang, Xingcai Zhang
Abstract
High Resolution Image Download MS PowerPoint Slide Carbon dot (CD)-based luminescent materials have attracted great attention in optical anti-counterfeiting due to their excellent photophysical properties in response to ultraviolet-to-visible excitation. Hence, there is an urgent need for the general synthesis of CD-based materials with multimode luminescence properties and high stability; however, their synthesis remains a formidable challenge. Herein, CDs were incorporated into a Yb,Tm-doped YF 3 matrix to prepare CDs@YF 3:Yb,Tm composites. The YF 3 plays a dual role, not only serving as a host for fixing rare earth luminescent centers but also functioning as a rigid matrix to stabilize the triplet state of the CDs. Under the excitation of 365 nm ultraviolet light and 980 nm near-infrared light, CDs@YF 3:Yb,Tm exhibited blue fluorescence and green room-temperature phosphorescence of CDs and upconversion luminescence of Tm 3+, respectively. Due to the strong protection of the rigid matrix, the stability of CDs@YF 3:Yb,Tm is greatly improved. This work provides a general synthesis strategy for achieving multimode luminescence and high stability of CD-based luminescent materials and offers opportunities for their applications in advanced anti-counterfeiting and information encryption.