White organic light-emitting devices(WOLED) have been attracting tremendous attention nowadays since from first being reported.They have many advantages such as their lightness and thinness

self light-(emission

) broad viewing angle

quick response

high efficiency

easy fabrication

low driving voltage

low(energy) consumption

low cost

etc.Therefore

they are becoming potential competitors in full color displays

backlights for liquid crystal displays and even next-generation of light sources.We fabricated a new type of white organic electroluminescent device using TBPe as blue fluorescent(dopant.) The configuration of the device is ITO/PVK:TBPe/Alq

3

:rubrene/Mg:Ag.In the device

PVK

Alq

3

and rubrene are used as hole transport material

electron transport material and orange fluorescent dopant

(respectively).By adjusting the thickness of each emitting layer and the adulterated proportion properly

a white light with CIE coordinates of(0.26

0.33) was generated

which is located in the white-light region.The CIE coordinate stayed virtually constant when the voltage increased from 8 V to 16 V.The device had a(maximum)luminance of 738 cd/m

2

a maximum external efficiency of(0.2%).For enhancing the brightness and chromaticity of the device

we attempted to use Zn(BTZ)

2

instead of Alq

3

as electron transport material.Bright white light

over 1300 cd/m

2

was successfully obtained

and the maximum efficiency reached to(0.31)% at 8 V.In conclusion

the performance of the whole device was(increased) remarkably.We try to blend the polymer and small molecule organic material together as blue-light-emitting layer

which makes up the shortcoming for each other.The efficiency of white light-emitting is improved only by designing the device structure and changing the electron transport material reasonable.We make the device structure as simply as possible to satisfy the need of the practical use.