Scientists have prepared new room temperature phosphorescent amorphous materials

Pure organic room temperature phosphorescent materials are expected to be widely used in photovoltaic materials and biochemistry due to their long-life luminescence, diversified design and convenient preparation. The research team of Academician Tian He and Prof. Ma Wei of East China University of Science and Technology has made new progress in this field. Related results were published online in "German Applied Chemistry" and were selected as cover articles in VIP papers and journals.

At present, most of the room temperature phosphorescent materials are inorganic or noble metal-containing organic complexes, which are expensive and highly toxic, and it is difficult to achieve large-scale industrial preparation. The construction of pure organic room temperature phosphorescent systems mostly focuses on highly ordered crystalline structures or rigid matrix embedding materials, but such systems still face problems such as poor reproducibility and cumbersome processing in the preparation of solid thin film light-emitting devices, further limiting Commercial applications of such materials.

The researchers have easily prepared a series of amorphous polymer materials with high-efficiency room-temperature phosphorescence by simply binary copolymerization of various oxyphosphorus-substituted phenylphosphorescent monomers with acrylamide. Such amorphous materials can be observed by the naked eye due to their long life and efficient mass production.

It is worth noting that the material achieves room temperature phosphorescence without amorphous form of heavy atoms. At the same time, since the halogen heavy atom is not used in the system, the triplet luminescence lifetime is greatly increased, and the luminescence phenomenon can still last for 5 seconds after the excitation light source is removed.