New Room-Temperature Phosphorescence Material Discovered in China

TapTechNews June 3rd news, according to the official news of the Chinese Academy of Sciences, recently, the Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences successfully designed a new method and prepared a carbonized polymer nanodot material with multi-color ultralong room-temperature phosphorescence emission from blue to green, and the relevant research was published in the journal .

Phosphorescence is the main reason why the 'night pearl' can emit light in the dark. Phosphorescence is a slow-emitting photoluminescence phenomenon. When a certain substance at room temperature is irradiated by incident light of a certain wavelength (usually ultraviolet or X-ray), it absorbs light energy and enters the excited state (usually with a different spin multiplicity from the ground state), and then slowly de-excites and emits outgoing light with a wavelength longer than the incident light.

It is introduced that this new room-temperature phosphorescence material has a maximum of 49 seconds in the length of the phosphorescence afterglow visible to the naked eye, and the highest phosphorescence quantum yield reaches 19.5%, and it also has excellent anti-photobleaching property, and can emit different colors of phosphorescence from blue to green under the excitation of ultraviolet lamps with different wavelengths.

This characteristic makes it have great application potential in fields such as anti-counterfeiting identification and information encryption. For example, this material can be applied to highly secure anti-counterfeiting labels, and the authenticity of products can be verified through its unique phosphorescence characteristics.

In addition, the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences has recently made new progress in the research of afterglow luminescence dynamics of metal halides, revealing the regulatory role of doping on the intrinsic defect properties of metal halides, and realizing blue long afterglow luminescence in all-inorganic metal halides, and the results were published in .