Research Article

Enhancing Color Purity and Stable Efficiency of White Organic Light Diodes by Using Hole-Blocking Layer

Figure 5

The (a) current density-voltage, (b) luminance-voltage, and (c) luminous efficiency-current density characteristics of the various structures. The inset shows the normalized EL intensity spectra of the device A at the applied voltage of  7–10 V.
915894.fig.005a
(a)
915894.fig.005b
(b)
915894.fig.005c
(c)