Fig. 15From: White light emitting diode based on purely organic fluorescent to modern thermally activated delayed fluorescence (TADF) and perovskite materials(Reproduced with permission from Ref. [46] Copyright 2015, ©WILEY–VCH Verlag GmbH & Co. KGaA, Weinheim)a Chemical structures of emissive materials, b FRET mechanism between DMACDPS and TTPA (green) and DBP (red) under electrical excitation [spacer layer mCP (2 nm)], c current density and luminance vs. voltage spectra and d external EL quantum efficiency vs. current density spectra of the OLEDsBack to article page