期刊
CHEMICAL ENGINEERING JOURNAL
卷 426, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.131607
关键词
Fluorene; Room temperature phosphorescence; Long-afterglow; Host-guest synergistic effect; Information security
资金
- National Natural Scien-tific Foundation of China [21975021, 51803009, 51673024, 21975020, 21875019, 21490574]
- Beijing Institute of Technology Research Fund Program for Young Scholars
- Beijing National Laboratory for Molecular Sciences [BNLMS202007]
This study successfully designed and synthesized a new class of highly efficient organic room-temperature phosphorescence materials through a host-guest doping strategy. The materials exhibited long lifetime and high phosphorescence quantum efficiency, and showed potential applications in information encryption and decryption.
Metal-free organic phosphorescence materials are commonly utilized in the area of optoelectronics and bioelectronics. However, the development of materials with simultaneous efficiency and lifetime enhancement under ambient conditions remains a challenge. In this study, we design and synthesize a new class of highly efficient organic room-temperature phosphorescence (RTP) materials through the host-guest doping strategy. The host molecules not only act as a bridge to promote the intersystem crossing, but also build a rigid environment to limit nonradiative decay of triplet excitons. An optimal host-guest material is thus achieved which possesses an ultralong lifetime of up to 847 ms and phosphorescence quantum efficiency of 4.7% under ambient conditions. Furthermore, the RTP materials can be successfully applied to information encryption and decryption. Our developed method not only paves the way forward for RTP materials but also expands their applications.
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