Fig. 7: Deuteration effect.
From: The degradation mechanism of multi-resonance thermally activated delayed fluorescence materials
a Liquid chromatograms of 100 μM 1D (Ar-saturated THF containing 0.10 M tetrabutylammonium hexafluorophosphate) obtained during oxidative bulk electrolysis at an anodic potential of 1.04 V vs SCE. A Pt mesh and a Pt coil were used for the working and the counter electrodes, respectively. An Ag/AgNO3 pseudo reference electrode was used. The peak marked with an asterisk (*) corresponds to a benzophenone internal standard. b Decay in concentrations of 1 and 1D during the continuous oxidative bulk electrolysis. The solid lines are linear fits of the data. The values are Faradaic yields for oxidative degradation of 1 and 1D. c−f Electroluminescence spectra (c), current density–voltage curves (d), external quantum efficiencies as a function of current density (e), and percent luminance decays as a function of operation time of devices of 1 and 1D driven at a constant current density at an initial luminance of 1000 cd m −2 (f). The inset figure in f shows a magnified view in the percent luminance range 94.9−95.1%. The luminance and power efficiency as functions of current density are shown in Supplementary Fig. 26. Error bars represent the standard deviation of three independent experiments.
