Fig. 2From: White light emitting diode based on purely organic fluorescent to modern thermally activated delayed fluorescence (TADF) and perovskite materials(Reproduced with permission from Ref. [17] Copyright 2007, ©Applied Physics Letters)Chemical structures of rubrene and polymers. EL spectra of a rubrene-doped spirodiEHP (0.35 wt%) and b spiro-TPA50-diEHP devices. The insets in a and b EL spectra of rubrene-doped devices (0.5 wt%)Back to article page