Carbon dots-based delayed fluorescent materials: Mechanism, structural regulation and application

Mingxiu Lei; Jingxia Zheng; Yongzhen Yang; Lingpeng Yan; Xuguang Liu; Bingshe Xu

doi:10.1016/j.isci.2022.104884

Carbon dots-based delayed fluorescent materials: Mechanism, structural regulation and application

iScience. 2022 Aug 5;25(9):104884. doi: 10.1016/j.isci.2022.104884. eCollection 2022 Sep 16.

Authors

Mingxiu Lei¹, Jingxia Zheng¹, Yongzhen Yang¹, Lingpeng Yan^{1

2}, Xuguang Liu², Bingshe Xu^{1

3}

Affiliations

¹ Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.
² College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
³ Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030032, China.

Abstract

Delayed fluorescent (DF) materials have high internal quantum efficiency because of the triplet excitons involved in the radiation transition, and the spin-forbidden transition can effectively improve their luminescent lifetime. Compared with traditional afterglow materials including metal-containing inorganic coordination compounds and organic compounds, the DF materials based on carbon dots (CDs) have drawn extensive attention because of their advantages of low toxicity, environmental friendliness, stable luminescence, easy preparation and low cost. Most CDs-based DF materials can be realized by embedding CDs in matrix with covalent bonds, hydrogen bonds or/and other supramolecular interactions. Recently, matrix-free self-protective CDs-based DF materials are emerging. This review systematically summarizes the DF mechanism and structural regulation strategies of CDs-based DF materials, and the applications of CDs-based DF materials in anti-counterfeiting, information encryption, temperature sensing and other fields are introduced. Finally, the existing problems and future potentials of CDs-based DF materials are proposed and prospected.

Keywords: Materials science; Nanomaterials; Optical materials.

Publication types

Review