Table 1 Photophysical properties of PXZPM, PXZPyPM, and PXZTAZPM.

CompoundPLmax* (nm)S1† (eV)S1, 77K† (eV)T1† (eV)ΔEST‡ (eV)τp§ (ns)τd§ (μs)ФPL|| (%)Фpd¶ (%)kr# (107 s−1)kISC# (107 s−1)kRISC# (105 s−1)
PXZPM5212.622.582.540.0420.22.5610065/353.221.736.02
PXZPyPM5242.602.602.530.0719.42.7710065/353.351.805.57
PXZTAZPM5282.562.582.530.0520.42.799361/322.991.695.45

*Measured in the mCPCN host (6.0 wt %) at 300 K.

†Calculated from the onset wavelengths of fluorescence (300 K), fluorescence (77 K), and phosphorescence (77 K) spectra of three emitters in the mCPCN host.

‡Calculated from the onset wavelengths of fluorescence (77 K) and phosphorescence (77 K) spectra of three emitters in the mCPCN host.

§Measured in the mCPCN host (6.0 wt %) at 300 K.

||Measured in the mCPCN host (6.0 wt %) under degassed condition at 300 K. The error for ΦPL is ±1%.

¶The prompt and delayed fluorescence photoluminescence quantum efficiency under degassed condition at 300 K.

#The radiative rate constant, rate constants of ISC, and RISC process of 6.0 wt % PXZPM, PXZPyPM, and PXZTAZPM doped into the mCPCN host at 300 K.