Fig. 4: Phosphorescence properties and crystal structures of the control phosphors.
From: Abnormal thermally-stimulated dynamic organic phosphorescence
a Temperature dependent phosphorescence spectra of the CPO, FEO CEO, and FMO phosphors excited by 400 nm. b Afterglow photographs of the crystalline CPO, FEO CEO, and FMO materials taken by varying temperature from 303 to 343 K. c Intermolecular π-π stacking in CPO and FMO crystals at room temperature. d Thermal expansion coefficient of the CPO crystal along the principal axes (a–c) at the temperature from 273 to 353 K. e Conformational energies estimated for the optimized structures of the CPO (left) and FMO (right) molecules in dimer and trimer state.
