Figure 2
From: Efficient white phosphorescent organic light-emitting diodes using ultrathin emissive layers (<1 nm)
(a) EL spectra of the devices with different thickness of interlayers that between blue and green dyes at 6 V. Inset: the EL spectra of the device with 3 nm interlayer at different operating voltages. (b) Transient PL lifetime of blue film and blue-green film
