Tunable Fluorescence and Afterglow in Organic Crystals for Temperature Sensing
Jianxin Wang, Ling‐Ya Peng, Zheng‐Fei Liu, Xin Zhu, Li‐Ya Niu, Ganglong Cui, Qing‐Zheng Yang
Abstract
The modulation of the properties of emission from multiple emission states in a single-component organic luminescent material is highly desirable in data anticounterfeiting, information storage, and bioapplications. Here, a single-component luminescent organic crystal of difluoroboron diphenyl β-diketonate with controllable multiple emission colors is successfully reported. The temperature-dependent luminescence experiments supported by high-level theoretical calculations demonstrate that the ratio of the fluorescence between the monomer and excimer and the phosphorescence maxima of the excimer can be effectively regulated. In addition, the temperature-dependent fluorescence and afterglow dual-emission color changes provide a new strategy for the design of highly accurate double-checked temperature sensors.