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Ultraviolet irradiation-responsive dynamic ultralong organic phosphorescence in polymeric systems
Yongfeng Zhang1, Liang Gao1, Xian Zheng1
1School of Materials Science and Engineering, Chongqing University of Technology, Chongqing, China.
Nature Communications
|April 17, 2021
Summary
Researchers developed ultraviolet irradiation-responsive ultralong room temperature phosphorescence (RTP) materials. Doping organic phosphors into a polymer matrix enabled tunable afterglow and extended phosphorescence lifetimes for advanced applications.
Area of Science:
- Materials Science
- Organic Chemistry
- Photophysics
Background:
- Room temperature phosphorescence (RTP) is highly sought after for its potential applications.
- Developing efficient stimulus-responsive phosphorescent organic materials is challenging due to design complexities and spin-forbidden intersystem crossing.
Purpose of the Study:
- To present a strategy for achieving ultraviolet irradiation-responsive ultralong RTP (IRRTP).
- To demonstrate the tunability of phosphorescence lifetime and explore potential applications.
Main Methods:
- Doping simple organic phosphors into an amorphous poly(vinyl alcohol) matrix.
- Investigating ultraviolet (254 nm) irradiation effects on phosphorescence properties.
- Characterizing phosphorescence emission, afterglow, and lifetime dynamics.
Main Results:
- Observed green and yellow afterglow emissions with enhanced phosphorescence upon UV irradiation.
- Demonstrated tunable phosphorescence lifetimes, with a significant 14.3-fold increase (58.03 ms to 828.81 ms) after 45 min irradiation.
- Successfully applied the materials in polychromatic screen printing and multilevel information encryption.
Conclusions:
- The developed strategy provides a facile method for creating IRRTP materials.
- The amorphous hybrid films exhibit extraordinary IRRTP, showing promise for smart flexible luminescent materials and sensors.
- Dynamically controlled phosphorescence opens new avenues for advanced optical technologies.
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