期刊
NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41467-021-22609-y
关键词
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资金
- National Natural Science Foundation of China [21875025]
- Special Program of Chongqing Science and Technology Commission [cstc2018jcyjAX0296, cstc2017zdcyzdyfX0007]
- Innovation Research Group at Institutions of Higher Education in Chongqing [CXQT19027]
- Science and Technology Research Program of Chongqing Municipal Education Commission [KJZD-K201801101]
- Postgraduate Tutor Team Project of Polymer Materials Engineering of Chongqing Education Commission
- Singapore Agency for Science, Technology and Research (A*STAR) AME IRG grant [A1883c0005]
A feasible strategy has been presented to achieve ultraviolet irradiation-responsive ultralong room-temperature phosphorescence in amorphous polymer materials, allowing for tuned phosphorescence lifetime and demonstrating promising applications in smart flexible luminescent materials and sensors with dynamically controlled phosphorescence.
Room temperature phosphorescence (RTP) has drawn extensive attention in recent years. Efficient stimulus-responsive phosphorescent organic materials are attractive, but are extremely rare because of unclear design principles and intrinsically spin-forbidden intersystem crossing. Herein, we present a feasible and facile strategy to achieve ultraviolet irradiation-responsive ultralong RTP (IRRTP) of some simple organic phosphors by doping into amorphous poly(vinyl alcohol) matrix. In addition to the observed green and yellow afterglow emission with distinct irradiation-enhanced phosphorescence, the phosphorescence lifetime can be tuned by varying the irradiation period of 254nm light. Significantly, the dynamic phosphorescence lifetime could be increased 14.3 folds from 58.03ms to 828.81ms in one of the obtained hybrid films after irradiation for 45min under ambient conditions. As such, the application in polychromatic screen printing and multilevel information encryption is demonstrated. The extraordinary IRRTP in the amorphous state endows these systems with a highly promising potential for smart flexible luminescent materials and sensors with dynamically controlled phosphorescence. Efficient stimulus-responsive phosphorescence organic materials are attractive, but are extremely rare because of unclear design principles and intrinsically spin-forbidden intersystem crossing. Here, the authors present a facile strategy to achieve ultraviolet irradiation-responsive ultralong room-temperature phosphorescence in several simple amorphous polymer materials.
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