Fig. 2: The luminescent images, prompt and delayed PL spectra.

a Schematic Jablonski diagram for organic emitter. b Photographs of Cz-Cm, Cz-Lab, TCz-F-Cm, and TCz-F-Lab taken before and after switching off excitation source. The prompt (solid line) and delayed (dash line) PL spectra of c TCz-F-Cm (red line), TCz-F-Lab (black line), and d TCz-H-Cm (red line), TCz-H-Lab (black line) in the solid state.