Organic long persistent luminescence

摘要

Based on a process called long persistent luminescence (LPL), glow-in-the-dark materials work by slowly releasing energy absorbed from ambient light. Most commercial glow-in-the-dark materials are based on inorganic compounds and include rare metals. However, these materials are expensive, require high temperatures to manufacture, and scatter light when ground into powders for paints.1 Carbon-based organic materials can overcome many of these disadvantages. But achieving long-lived emission has been difficult, and the longest emission based on phosphorescence from organics at room temperature was only a few minutes.