The developments in rare earth organic/polymer electroluminescence(EL)were described.Since the studies of RE-OEL were reported in 1990 by Kido et al

the study in this field has made a progress rapidly.In our group

the studies on organic/polymer EL-based on RE complexes

such as white electroluminescence based on Dy-complex and Eu-Tb double nuclear complexes

Eu-red electroluminescence with higher efficiency and long lifetime were carried out

and phenomena of electronic transition from

5

D

0

-

7

F

1

at 596nm of a new EL based on Eu-polymer complex were observed.The efficiency and durability of OEL devices based on Eu complex improved intensively

and the efficiency is about 4.6% which exceeded the theoretical limit

and the lifetime(the decaying time from 100cd/m

2

to 50cd/m

2

)is the highest so far.Either blue EL or IR EL emissions based on Tm-complexes could be observed when the ligand changed.On the other hand

new IR emission and

I-V

characteristics of OEL devices based on Yb

Er and Nb-complexes were studied too.Finally some problems existed in RE OEL were discussed in which the luminance and durability should be improved

and new RE-complexes with stable structure and good film forming properties must be carried out.The foreground for color displays is prospected.