Micro-optical resonator type organic electroluminescent device

Details Micro-optical resonator type organic electroluminescent device Micro-optical resonator type organic electroluminescent device

1996-10-25

1998-07-14

McCamish, Marion E.

Stock material or miscellaneous articles

Composite

Of inorganic material

428917, 313506, 313507, 313509, 372 92, 372 98, 372 99, 372102, H05B 3312

Patent

active

057801746

ABSTRACT:
A micro-optical resonator type organic electroluminescent device utilizing an organic electroluminescent material high in emission efficiency but broad in emission spectrum width, has a narrow half bandwidth in the emission peak and a superior forward directivity and an excellent monochromaticity in light not separate into components, wherein a micro-optical resonator is formed by a multi-layered mirror and a metal mirror. The optical length of the micro-optical resonator, calculated from the total thickness and the refractive index of a transparent conductive layer and a luminous layer placed between the multi-layered mirror and the metal mirror and also from the light penetration depth into the multi-layered mirror, is 1.5 times the wavelength of a desired light emitted from the device, and the desired light is set on the short wavelength side of the emission spectrum of the electroluminescent material.

REFERENCES:
patent: 4720432 (1988-01-01), Vanslyke et al.
patent: 5478658 (1995-12-01), Dodabalapur et al.
Tetsuo Tsutsui, et al., "Sharply Directed Emission in Organic Electroluminescent Diodes with an Optical-Microcavity Structure", Appl. Phys. Lett. 65 (15), 10 Oct. 1994, pp. 19-21.
Chihaya Adachi, et al., "Organic Electroluminescent Device Having a Hole Conductor as an Emitting Layer", Appl. Phys. Lett. 55 (15), 9 Oct. 1989, pp. 1489-1491.
C. W. Tang, et al., "Organic Electroluminescent Diodes", Appl. Phys. Lett. 51 (12), 21 Sep. 1987, pp. 913-915.

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