Research / 2020 / Article / Fig 6

Research Article

Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED

Figure 6

(a) Energy level of doped devices. (b) Current density-voltage-luminance characteristics and (c) change in external quantum efficiency with the luminance in the doped devices. (d) EL spectrum of 3Ph-Cz-CN at different voltages in device I (inset is the picture of device I at the voltage of 8 V). Device configurations: ITO/MoO3 (10 nm)/NPB (60 nm)/mCP (10 nm)/X:PO-01 (20 nm, 10 wt%)/Bphen (40 nm)/LiF (1 nm)/Al.