Two‐Photon Ionization Induced Stable White Organic Long Persistent Luminescence

Organic long persistent luminescence with afterglow lasting up to 20–40 minutes was achieved based on two-photon ionization mechanism at room temperature in a simple binary system. Through modulation of molecular structures and potential ISC channels between excited states, the afterglow profiles can be rationally tuned from cyan (0.19, 0.22), cold white (0.31, 0.35), standard white (0.33, 0.33) to warm white (0.31, 0.46).