Fig. 1: Mechanism and properties of multi-mode RTP materials.

a Schematic illustration of sample preparation processes and microstructures; b Photographs of RTP materials with different CBtCOONa contents under irradiation with 310 and 365 nm lamps and with the lamps off; c, d Phosphorescence spectra of RTP materials with different CBtCOONa content at 310 nm and 365 nm excitations; e Commission Internationale d’Eclairage (CIE) coordinate diagram of RTP materials.