Blue-emitting materials and electroluminescent devices containin

Details Blue-emitting materials and electroluminescent devices containin Blue-emitting materials and electroluminescent devices containin

1996-07-02

1999-05-18

Yamnitzky, Marie

Stock material or miscellaneous articles

Composite

Of inorganic material

428917, 428704, 428457, 428332, 313504, 313506, H05B33/00

Patent

active

059049944

ABSTRACT:
A class of blue emitting materials, that, when placed in EL devices with an emitter layer and a hole transporter layer, provide EL devices that emit white light. The blue-emitting material has a non-polymeric molecular structure that comprises a five or six-membered heterocyclic moiety selected from the groups consisting of oxazole, imidazole, quinoline and pyrazine with at least three substituents pendant thereto. The blue-emitting materials of the present invention have certain characteristics that allow them to be formed into films with advantageous properties. The films formed from these materials are amorphous (i.e they have a crystal size less than about 1000 .ANG.). The thickness of the films of the blue-emitting material is less than 600 .ANG. in the devices of the present invention.

REFERENCES:
patent: 3684764 (1972-08-01), Buell
patent: 3843632 (1974-10-01), Matsuo et al.
patent: 3976656 (1976-08-01), Hammond
patent: 5077142 (1991-12-01), Sakon et al.
patent: 5151629 (1992-09-01), VanSlyke
"The Action of Ammonia on Benzoin", by Davidson, D., Weiss, M., Jelling, M., J. Org. Chem, pp. 328-334 (1937).
"Electroluminescence of Doped Organic Thin Films", by Tang, C. W., VanSlyke, Chen, C.H., J. Appl. Phys., 65(9) pp. 3610-3616 (May 1, 1989).
"White Light From an Electroluminescent Diode Made From Berggren, M., Gustafsson, Inganas, O., Andersson, M. R., Hjertberg, T., Wennerstrom, O., J. Appl. Phys. 76(11), pp. 7530-7534 (Dec. 1, 1994).
"Novel Structure of Organic Electroluminescence Cells With Conjugated Oligomers", Hosokawa, C., Higashi, H., Kusumoto, T., Appl. Phys. Lett. 62(25) pp. 3238-3240 (Jun. 21, 1993).
"Liquid Scintillators. V. Absorption and Fluorescence Spectra of 2,5-Diaryloxazoles and Related Compounds", by Ott, D. G., Hayes, F. Newton, Hansbury, E., Kerr. V.N., J.A.C.S. vol. 79, pp. 5448-5454 (Apr. 10, 1957).
"Electroluminescent Element--In Which Fluorescent Luminous Layer Contains an Oxazole CPD", Derwent Publications Ltd., AN 91-249194 and JP 03 162 482 A, Jul. 12, 1991.
"Organic Electroluminescent Device", by Yoshio, H. et al., Patent Abstracts of Japan, vol. 095, No. 009, (Oct. 31, 1995) and JP 07 150137 A (Jun. 13, 1995).
"White Organic Electroluminescent Devices", by Jordan, R. H. et al., Appl. Phys. Lett., 68(9), pp. 1192-1194, (Feb. 26, 1996).

Affiliated with

Also associated with

Rating

Blue-emitting materials and electroluminescent devices containin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Blue-emitting materials and electroluminescent devices containin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blue-emitting materials and electroluminescent devices containin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1759095