An organic electroluminescence device is described and includes a transparent
substrate with a first electrode formed on the top surface of the transparent substrate
in a predetermined pattern. The first electrode is transparent. An organic layer
includes a hole injecting layer, a hole transporting layer, an emitting layer,
and an electron transporting layer. They are sequentially stacked on the top surface
of the first electrode. A second electrode is formed on the top surface of the
organic layer in a predetermined pattern. The distance from the top surface of
the hole transporting layer to the bottom surface of the second electrode ranges
from about 350 to about 450 such that the color purity and brightness
of blue light is optimized. Accordingly, the organic electroluminescence device
increases the color purity and brightness of blue light, thereby providing an image
having excellent picture quality.
