Bis-2-(2-hydroxyphenyl)benzothiazolate)zinc (Zn(BTZ)

2

) is one of the best white electroluminescent materials used in organic light emitting diodes (OLEDs). White light

which is composed of three discrete peaks in R/G/B regions

is very important and particularly useful for full color display. However

most of white OLEDs

so far

are fabricated with multilayer structures

which results in the complication of fabrication process and decline of quantum efficiency. So these devices are not suitable for the purpose of large scale industrial manufacture. In this paper

firstly

Zn(BTZ)

2

had been synthesized from the complex reaction between zinc acetate dihydrate and 2-(2-hydroxyphenyl) benzothiazolate. Then we used Zn(BTZ)

2

as main light emitting material and fabricated two types of organic white light emitting devices. The configurations of the devices are as follows: ITO/PVK: TPD/Zn(BTZ)

2

/Al and ITO/PVK:TPD/Zn(BTZ)

2

:Rubrene/Al. The bright and steady light emitting had been obtained

and the brightness of the devices came to 3200cd/m

2

and 2900cd/m

2

(at a driving voltage of 16V)

respectively. We also measured the CIE coordinates of the above devices

they were (x=0.242

y=0.359) and (x=0.324

y=0.343)

respectively. The latter CIE coordinate is very close to the equi energy point (x=0.33

y=0.33)

and the corresponding quantum efficiency value is 0.47%. This value is higher than the former one

which is 0.32%. Details on the white light emitting characteristics of the devices were explained by the curves of current den sity voltage

optical current voltage and quantum efficiency current density

they were measured using a quantum efficiency measure system including the Keithley 485 Picoammeter and 2400 SourceMeter. We also discussed the emitting mechanisms of the material and the devices at last.