Copolymer, a process for producing the same and an electrolumine

Details Copolymer, a process for producing the same and an electrolumine Copolymer, a process for producing the same and an electrolumine

1994-12-27

1996-12-24

Weimar, Elizabeth C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526248, 526259, 526266, 526268, 428690, 428691, H01J 162

Patent

active

055874444

ABSTRACT:
A novel copolymer affording a highly efficient electroluminescent element by the use of which the movement of electric charge occurs very efficiently and a full color luminescence is possible, a process for producing the same and an electroluminescent element, are provided, which copolymer is prepared by copolymerizing N-vinylcarbazole as an electron-transporting compound with a specified cumarin derivative as a luminescent compound; which process comprises copolymerizing a specified quantity of a specified cumarin derivative with a specified quantity of N-vinylcarbazole in the presence of a polymerization initiator or a catalyst; and which electroluminescent element is prepared by using a thin film obtained from the copolymer.

REFERENCES:
patent: 3316087 (1967-04-01), Munder et al.
Freloves et al, "Coumarin Derivatives in Preparing Fluorescence Lagend Polyacrylamide", (1980) CA#93:27152.
Nishikitani et al., "Organic Electroluminescent devices" (1992), CA#119:82662.
Uchida et al., "Preparation Of Coumarin Derivatives For Electroluminescent Devices", Abstract, Database Chemabs Chemical Abstracts Service, Columbus, Ohio, Oct. 25, 1994.
Kido et al., "White Light-Emitting Organic Electroluminescent Devices Using The Poly(N-Vinylcarbazole) Emitter Layer Doped With Three Fluorescent Dyes", Applied Physics Letters, vol. 64, No. 7, Feb. 1994-Nov. 23, 1993, New York, pp. 815-817.
Nippon Oil KK, Abstract, Database WPI, Section Ch, Week 9304, Derwent Publications Ltd., London, GB; A26, AN 93-032229, Dec. 14, 1992.
Kido et al., "Bright Blue Electroluminescence From Poly(N-Vinylcarbazole)", Applied Physics Letters, vol. 63, No. 8, Nov. 8, 1993, New York, pp. 2627-2629.

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