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Chemical structures of PVK, DPAVBi, and Os(bpftz) and a schematic illustration of the device configuration used in this study.
EL spectra of devices formed using DPAVBi or Os(bpftz) : PVK-PBD as the emitting layer. Inset: energy level diagram for the devices having the configuration ITO/PEDOT/Blend/TPBI/Mg:Ag.
PL (excited at ) and EL spectra of the doubly doped device at an applied voltage of . Inset: CIE color coordinates of the EL emissions from the DPAVBi-doped, Os(bpftz)-doped, and doubly doped devices.
Plots of (a) current density and (b) luminance as functions of the applied voltage for both the blue and white PLEDs.
Plots of external quantum efficiency and luminance efficiency as functions of current density for both the blue and white PLEDs.
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