As a potential candidate for organic electroluminescent material

bi(8-hydroxyquinolinolato)magnesium was synthesized by a reaction of magnesium chloride and 8-hydroxyquinoline. The composition of the complex was confirmed to be Mg(C

9

H

7

NO)

2

·2H

2

O by elementary analysis

thermogravimetry analysis and IR spectroscopy. Ultra-violet absorption spectrum was obtained in alcohol solution. The maximum emission of the compound is at 472nm. The results showed that the complex has excellent photoluminescence property and can be applied as a green-blue emitting material. With the complex as an emitter and an electron transporting layer

bright blue-green electroluminescence diodes were fabricated by conventional vacuum-coating method. The structure of the diodes was ITO/TPD/Mgq

2

/Al. The EL spectrum for device was observed and was very similar to the corresponding PL emission spectrum

clearly the magnesium chelate acted as the emitter in the device. Comparing to the PL spectrum

the maximum emission wavelength in EL emission spectrum shifts from 472nm to 528nm

indicating that the exciting transporters(electrons and holes) combine in a wider energy range. The

J-V

curve implied that the device had the standard characteristic of diode communication. The

L-J

curve showed that the turn-on voltage for the device was satisfied

the maximum luminance was 12 000 cd·m

-2

under 15V drive voltage.