Fig. 6: Application of polymeric RTP materials in light-emitting diodes (LEDs) and dynamic anti-counterfeiting.
From: Long lifetimes white afterglow in slightly crosslinked polymer systems
a Schematic of the synthesis of LED afterglow lampshade. b One component polymeric RTP material for LED display. DC on and off represent the switching on and off of power supply, respectively. The arrow indicates the direction of the afterglow path. “S” stands for the starting point and “T” stands for the terminal point. c Images of three-component white light emitter for afterglow lampshade under different driving voltages. d Processing schematic of PAACR for dynamic anti-counterfeiting. e Luminescence images of the one-component polymer model material PAACR under natural light, white light flash excitation, and 365 nm ultraviolet light excitation. “VL” (electric torch) denotes visible light.
