Table 1 Summary of the photophysical properties of the deuterated and nondeuterated exciplexes

From: High-efficiency and long-lifetime deep-blue phosphorescent OLEDs using deuterated exciplex-forming host

Compounds

λema [nm]

λexb [nm]

ETc [eV]

τdd [μs]

ФPLd [%]

kre [×107 s−1]

D-SiCzCz

377

466

2.95

2.35/2.27

97/92

4.13/4.05

D-SiTrzCz2

427

SiCzCz

387

466

2.90

2.42/2.50

94/87

3.88/3.48

SiTrzCz2

428

  1. aPL emission measured in pristine film at room temperature.
  2. bExciplex emission measured in vacuum-evaporated films.
  3. cTriplet energy measured through low temperature (77 K) phosphorescence spectra in exciplex-forming films.
  4. dTransient decay and PLQY measured in 10 wt% PtON-TBBI/PtON-tb-DTB doped exciplex-forming films.
  5. eRate constants of radiation calculated using kr = ФPL/τd.
Back to article page