Photoluminescence characterization of Cd-TFTPA/NH4F powder under ambient conditions. (a) The URTP spectra of the Cd-TFTPA/NH4F powder under the excitation at 260 nm (blue) and 360 nm (green), respectively. (b) Excitation-phosphorescence mapping of powder under ambient conditions. (c, d) Decay curves of Cd-TFTPA/NH4F at 417 nm and 533 nm. (e) Excitation-dependent phosphorescence spectra of Cd-TFTPA/NH4F. (f) CIE coordinate diagram of Cd-TFTPA/NH4F by changing the excitation wavelengths.