Article comprising a microcavity light source

Details Article comprising a microcavity light source Article comprising a microcavity light source

1994-05-20

1995-12-26

Nold, Charles R.

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428917, 313504, 372 92, 372 45, 372 39, 372 7, 372 69, 372 41, 372 6, 372 2, 372 44, 385 47, 385131, 359838, H05B 3312, H01S 308

Patent

active

054786584

ABSTRACT:
Optical microcavities are potentially useful as light emitters for, e.g., flat panel displays. Such microcavities comprise a layer structure, including two spaced apart reflectors that define the cavity, with a layer of organic (electroluminescent) material disposed between the reflectors. We have discovered that a microcavity can simultaneously emit radiation of two or more predetermined colors such that the emission has a desired apparent color, exemplarily white. Emission of two or more colors requires that the effective optical length of the cavity is selected such that the cavity is a multimode cavity, with the wavelengths of two or more of the standing wave modes that are supported by the cavity lying within the emission region of the electroluminescence spectrum of the active material.

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"White Light-Emitting Organic Electroluminescent Devices Using the Poly(N-vinylcarbaxole) Emitter Layer Doped With Three Fluorescent Dyes", by J. Kido et al., Applied Physics Letters, vol. 64(7), Feb. 14, 1994, pp. 814-817.
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