An organic electroluminescent device having an organic layer between a pair of
electrodes. The organic layer (in particular, a hole-transporting layer) has a
polymer of a vinyl compound represented by the following formula (1):
##STR1##
- wherein R1 and R2 are the same or different, each
representing a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group.
The glass transition temperature of the polymer is about 200 to 250 C., and
the polymer has high heat-resistance. Thus, the use of the polymer improves heat
resistance of an organic EL device.
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