Rational molecular and doping strategies to obtain organic polymers with ultralong RTP.

Organic-doped polymers and room-temperature phosphorescence (RTP) mechanisms have been widely reported. However, RTP lifetimes >3 s are rare and RTP-enhancing strategies are incompletely understood. Herein, we demonstrate a rational molecular doping strategy to obtain ultralong-lived, yet bright RTP polymers.

Room Temperature Phosphorescent (RTP) Thermoplastic Elastomers with Dual and Variable RTP Emission, Photo-Patterning Memory Effect, and Dynamic Deformation RTP Response.

Room temperature phosphorescent (RTP) polymers have advantages of strength, toughness, and processing and application flexibility over organic small molecular crystals, but the current RTP polymers are all from rigid plastics and involve chemical linkage and hydrogen and ionic bonds, and thermoplastic RTP elastomer has not been attempted and realized. Moreover, solution-processed films by simply mixing polymers and organic RTP materials can only show weak and single blue RTP. Here it is presented that such elastomer films, once thermomechanically plasticized, can emit bright and long-lived dual RTP.

Gaining New Insights into Trace Guest Doping Role in Manipulating Organic Crystal Phosphorescence.

Trace guest doping systems often show better room temperature phosphorescence (RTP), but trace guest doping role and mechanism are not recognized well. Here we cocrystallize commercial (CCZ) and self-made (LCZ) carbazole derivatives and verify that 0.2‰ isomer doping can afford the deserved crystal RTP, but further increasing the isomer amount hardly improves RTP.