Vinyl polymer and organic electroluminescent device
AssigneesYasuhiko Shirota, Daicel Chemical Industries, Ltd.
InventorsYasuhiko Shirota, Yutaka Ohsedo, Kazuyuki Moriwaki, Kenji Okumoto
Life of this patent
Estimating the term…
Abstract
An organic electroluminescent device comprises an organic layer between a pair of electrodes. The organic layer (in particular, a hole-transporting layer) comprises a polymer of a vinyl compound represented by the following formula (1): 1 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.
Claims12
A vinyl compound represented by the following formula (1):
- 14
- wherein R1 and R2 are the same or different, each representing a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group.
A vinyl polymer comprising a unit represented by the following formula (2):
- 16
- wherein R1 and R2 are the same or different, each representing a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group.
Dependencies are inferred from the claim text.