Fig. 2: PL characteristics in isomer-free CD49 crystal at room temperature (298 K) and low temperature (5 K).

a Steady-state PL spectra. b PL spectra at different delay times at 0 ns and 1 ms at 298 K and 5 K. c PL lifetime at 550 nm under 5 K.
a Steady-state PL spectra. b PL spectra at different delay times at 0 ns and 1 ms at 298 K and 5 K. c PL lifetime at 550 nm under 5 K.