Table 1.
Compound | λabs (nm) | λPL (nm) | ΦPL (%)c | τp (ns)d/τd (μs)d | HOMO (eV)e | LUMO (eV)f | ES/ET (eV)g | ΔEST (meV)h | Ea (meV)i |
---|---|---|---|---|---|---|---|---|---|
Sola | Sola/filmb | Sola/filmb | |||||||
TMCz-BO | 282,377 | 446/467 | 81/98 | 38/0.75 | −5.93 | −2.77 | 2.95/2.93 | 20.0 | 13.4 |
TMCz-3P | 298,386 | 455/477 | 56/76 | 29/14.5 | −5.97 | −2.89 | 2.88/2.74 | 134 | 39.8 |
aMeasured in oxygen-free toluene at room temperature (298 K).
b30 wt% doped thin film in a host matrix (host = PPF).
cAbsolute PLQY evaluated using an integrating sphere under a nitrogen atmosphere.
dPL lifetimes of prompt (τp) and delayed (τd) decay components for 30 wt% doped film at 298 K.
eDetermined by photoelectron yield spectroscopy in pure neat films.
fDeduced from the HOMO and optical energy gap (Eg).
gSinglet (ES) and triplet (ET) energies estimated from onsets of the emission spectra at 298 and 77 K in 30 wt% doped films, respectively.
hΔEST = ES − ET.
iActivation energies of RISC in 30 wt% doped films.