Fig. 2: Photophysical properties of DCzB.
From: Thermally activated triplet exciton release for highly efficient tri-mode organic afterglow
a Absorption and steady-state PL spectra of DCzB in dilute toluene solution and film states. b Plot of PL intensity ratio (I/I0) and PL lifetime versus water fraction in the THF solvent, where I0 is the PL intensity in pure THF and the insets are the photographs of DCzB solution with 0 and 95% water under 365 nm excitation at room temperature. c Lifetime decay profiles (510 nm) of DCzB solution in air and argon. d Steady-state PL (black line), afterglow (red line, delay 100 ms), and phosphorescent spectra (blue line, delay 5 ms) of DCzB crystal at 300 and 77 K with corresponding photographs taken after the removal of the 365 nm excition source. The upper inset shows the transient PL decay image of the sample recorded at 300 K. e Fluorescence decay profiles of DCzB crystal at 300 and 77 K. f Afterglow decay profiles of the 475, 495, and 525 nm emission bands of DCzB crystal excited at 380 nm at room temperature. Source data are provided as a “Source Data file”.
