Fig. 2: Electroluminescence performance.
From: The degradation mechanism of multi-resonance thermally activated delayed fluorescence materials

a Schematic of the configuration of the electroluminescence devices tested, including the energy levels and chemical structures of their component materials. b Electroluminescence spectra. c Current density–voltage curves. d External quantum efficiencies as a function of current density. e Percent luminance decays as a function of operation time driven at a constant current density at an initial luminance of 1000 cd m−2.