期刊
SCIENCE CHINA-CHEMISTRY
卷 63, 期 10, 页码 1443-1448出版社
SCIENCE PRESS
DOI: 10.1007/s11426-020-9761-x
关键词
color tunability; room temperature phosphorescence; excitation dependent emission; persistent luminescence; UV-light detection
资金
- National Natural Science Foundation of China [21875104, 21975120, 21973043, 91833304, 51673095]
- Natural Science Fund for Distinguished Young Scholars of Jiangsu Province [BK20180037]
- Fundamental Research Funds for the Central Universities
Ultralong organic phosphorescence (UOP) materials have roused considerable attention in the field of photonics and optoelectronics owing to the feature of long-lived emission lifetimes. However, to develop UOP materials with color-tunability is still a formidable challenge. Here, we report a class of UOP materials containing carbonyl, amino or amide groups, exhibiting colortunable persistent luminescence ranging from blue (458 nm) to yellow-green (508 nm) under different UV wavelength excitation. Taken theoretical and experimental results together, we conclude that the excitation dependent color-tunable UOP emission is ascribed to multiple emission centers from single molecular and aggregated states in crystal. Given color-tunable UOP feature, these materials are used to successfully realize visual UV-light detection. This finding not only provides a strategy to design new organic phosphorescent molecules with colorful emission, but also extends the scope of the applications of purely organic phosphorescent materials.
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