Organic electroluminescent device

Details Organic electroluminescent device Organic electroluminescent device

1991-02-12

1992-03-03

Mintel, William

357 8, 357 16, H01L 3300

Patent

active

050936980

ABSTRACT:
An organic electroluminescent device is constituted by first and second electrodes opposing each other and a multilayered body having a plurality of organic films sandwiched between the electrodes and including an electroluminescent layer. A donor impurity is doped in a first organic film in contact with the first electrode, and an acceptor impurity is doped in a second organic film in contact with the second electrode. A third organic film sandwiched between the first and second organic films serves as an electroluminescent layer. A material having a band gap narrower than those of the first and second organic films is selected as a material of the third organic film so as to confine carriers. No impurity is doped in the third organic film.

REFERENCES:
patent: 4539507 (1985-09-01), Van Slyke et al.
patent: 4720432 (1988-01-01), Van Slyke et al.
patent: 4885211 (1989-12-01), Tang et al.
J. Appl. Phys., vol. 54, (5), Martin et al., May, 1983, pp. 2792-2794, "Influence of Dioxygen on the Junction Properties of Metallophthalocyanine Based Devices".
Tang et al., "Organic Electroluminescent Diodes," Appl. Phys. Lett. 51 (12), Sep. 21, 1987, pp. 913-915.
"Electroluminescence of Perylene Films with a Conducting Polymer qs an Anode" Hayashi et al., Japanese Journal of Applied Physics, vol. 25, No. 9, 9/86, pp. L773-L775.
"Electroluminescence of Doped Organic Thin Films", Tang et al., J. Appl. Phys. 65(0), May 1, 1989, pp. 3610-3616.
"Organic Electroluminescent Diodes", Appl. Phys. Lett. 51 (12), Sep. 21, 1987, Tang et al., pp. 913-915.

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