Fig. 2: Phosphorescent properties of typical dimeric luminophore of TpPBr with robust RTP.
a Delayed luminescence spectra of crystalline and amorphous TpPBr powder at the different excitation wavelength (298 K, in air, delayed 8 ms). b Excitation-phosphorescence mapping of TpPBr powder (298 K, in air). The color change from dark blue to pink represents the increase in emission intensity. c Luminescent photographs of crystalline, ground, and amorphous TpPBr powder before and after turning off the excited light (298 K, in air, λex = 405 nm). d Wide-angle X-ray diffraction (XRD), and (e) differential scanning calorimetry (DSC) of crystalline, ground, and amorphous TpPBr powder. DSC data were collected from the first heating cycle. f Delayed luminescence spectra of crystalline, ground, and amorphous TpPBr powder (298 K, in air, λex = 405 nm). g Transient photoluminescence (PL) decay mapping of amorphous TpPBr powder. The color change from pink to dark blue represents the decrease in emission intensity (298 K, in air, λex = 405 nm). h PL intensity decay curves of crystalline and amorphous TpPBr powder in a vacuum or air at the peak of 610 nm (298 K, λex = 415 nm). The black box and arrow indicate the light green scatters corresponding to the upper horizontal axis.
