磷光
离子键合
材料科学
Crystal(编程语言)
离子液体
荧光粉
激发
光电子学
纳米技术
化学
离子
光学
物理
有机化学
荧光
计算机科学
催化作用
电气工程
程序设计语言
工程类
作者
Changchang Li,Xinyang Zhao,Chao Li,Junhua Hu,Jing Wang,Qing Lou,Chen Niu,Zhijiang Song,Xu Chen,Gencai Pan
标识
DOI:10.1016/j.jallcom.2023.169674
摘要
Room temperature phosphorescence (RTP) materials are highly attractive in many fields, but it is still a great challenge to obtain RTP materials with color tunability. Herein, we report a new type of multicolor phosphorescence carbon dots (CDs) through confining CDs into rigid crystal network through the introduction of ionic bonds. The RTP color can rationally vary from green (553 nm) to orange-red (640 nm) under different excitation wavelengths. More importantly, the obtained CDs can also maintain their RTP emission in ethanol solution. The excitation-dependent property was owing to the existence of polychromatic emission centers on the surface of CDs, and the generation of RTP can be attributed to the ionic bond in CDs system to suppress non-radiative transition of triplet states. Based on this unique multicolor RTP phenomenon, the CDs were successfully applied in anticounterfeiting and light-emitting diodes. This finding not only provides a new strategy for the preparation of multicolor RTP materials but also reveals a great potential of CDs in developing novel optical materials.
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