670130.fig.009a
(a)
670130.fig.009b
(b)
670130.fig.009c
(c)
670130.fig.009d
(d)
Figure 9: PBD : TPBI (50 : 50 blend emitter layer) exciplex OLED device characteristics: EQE versus voltage (a), current efficiency versus current density (b), power efficiency versus voltage (c), and current density versus voltage (d).