Design of highly efficient deep-blue organic afterglow through guest sensitization and matrices rigidification

Shen Xu, Wu Wang, Hui Li, Jingyu Zhang, Runfeng Chen (), Shuang Wang, Chao Zheng, Guichuan Xing (), Chunyuan Song and Wei Huang ()
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Shen Xu: Nanjing University of Posts and Telecommunications
Wu Wang: Nanjing University of Posts and Telecommunications
Hui Li: Nanjing University of Posts and Telecommunications
Jingyu Zhang: Nanjing University of Posts and Telecommunications
Runfeng Chen: Nanjing University of Posts and Telecommunications
Shuang Wang: Nanjing University of Posts and Telecommunications
Chao Zheng: Nanjing University of Posts and Telecommunications
Guichuan Xing: University of Macau
Chunyuan Song: Nanjing University of Posts and Telecommunications
Wei Huang: Nanjing University of Posts and Telecommunications

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Blue/deep-blue emission is crucial for organic optoelectronics but remains a formidable challenge in organic afterglow due to the difficulties in populating and stabilizing the high-energy triplet excited states. Here, a facile strategy to realize the efficient deep-blue organic afterglow is proposed via host molecules to sensitize the triplet exciton population of guest and water implement to suppress the non-radiative decays by matrices rigidification. A series of highly luminescent deep-blue (405–428 nm) organic afterglow materials with lifetimes up to 1.67 s and quantum yields of 46.1% are developed. With these high-performance water-responsive materials, lifetime-encrypted rewritable paper has been constructed for water-jet printing of high-resolution anti-counterfeiting patterns that can retain for a long time (>1 month) and be erased by dimethyl sulfoxide vapor in 15 min with high reversibility for many write/erase cycles. These results provide a foundation for the design of high-efficient blue/deep-blue organic afterglow and stimuli-responsive materials with remarkable applications.

Date: 2020
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DOI: 10.1038/s41467-020-18572-9

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