期刊
ADVANCED FUNCTIONAL MATERIALS
卷 23, 期 27, 页码 3386-3397出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201203706
关键词
phosphorescence; room temperature phosphorescence; long lifetime; persistent emission; steroid; deuteration
类别
资金
- Tokyo University of Agriculture and Technology
- Japan Society for the Promotion of Science (JSPS)
- Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST) [22750132, AS231Z01236B, 24655175]
- Grants-in-Aid for Scientific Research [24655175, 22750132, 23360109] Funding Source: KAKEN
Persistent emission with a long lifetime (>1 s) from organic materials can only be observed at a low temperature, because of the significant nonradiative deactivation pathway that occurs at room-temperature (RT). If organic materials with persistent RT emission in air could be developed, they could potentially be utilized for a variety of applications. Here, organic host-guest materials with efficient persistent RT phosphorescence (RTP) are developed by minimizing the nonradiative deactivation pathway of triplet excitons. The nonradiative deactivation pathway is dependent on both nonradiative deactivation of the guest and quenching by diffusional motion of the host. The rigidity and oxygen barrier properties of the steroidal compound used as the host suppressed the quenching, and the aromatic hydrocarbon used as the guest is highly deuterated to minimize nonradiative deactivation of the guest. Red-green-blue persistent RTP with a lifetime >1 s and a quantum yield >10% in air is realized for a pure organic material.
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