Multi-colour room-temperature phosphorescence from fused-ring compounds for dynamic anti-counterfeiting applications

We present a facile strategy to achieve purely organic multi-colour room-temperature phosphorescence (RTP) films by doping typical fused-ring compounds into a poly(vinyl alcohol) matrix. Such RTP films demonstrate inherent RTP emission ranging from green to red with a long lifetime and high quantum yield (QY) (lifetime: similar to 0.56 ms, QY: similar to 35.4%). We further exploit such high-performance RTP films for dynamic information encryption. We present a facile strategy to achieve purely organic multi-colour room-temperature phosphorescence (RTP) films by doping typical fused-ring compounds into a poly(vinyl alcohol) matrix.