Organic electroluminescence device

Details Organic electroluminescence device Organic electroluminescence device

1999-01-29

2000-09-26

Yaminitzky, Marie

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Including components having same physical characteristic in...

4284111, 428457, 428690, 428917, 313506, 257 98, B32B 702, H05B 3300

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active

061240249

ABSTRACT:
An organic electroluminescence device in which the following total optical thickness is set at a value which enhances the intensity of the central wave length .lambda. (.lambda. being selected in the ranges of 440 to 490 nm, 500 to 550 nm, and 600 to 650 nm) of the electroluminescence light emitted from the organic multi-layer part having a refractive index of 1.6 to 1.8: (1) in the construction of a substrate/a transparent electrode of a high refractivity/an organic multi-layer part/a cathode, the total optical thickness of the transparent electrode of a high refractivity and the organic multi-layer part; (2) in the construction of a substrate/an underlayer of a high refractivity/a transparent electrode/an organic multi-layer part/a cathode, the total optical thickness of the underlayer of a high refractivity, the transparent electrode, and the organic multi-layer part or the total optical thickness of the transparent electrode and the organic multi-layer part; and (3) in the construction of a substrate/a underlayer of a low refractivity/a transparent electrode/an organic multi-layer part/a cathode, the total optical thickness of the transparent electrode and the organic multi-layer part. The device has a simple construction and the color purity of the blue light emission is particularly increased.

REFERENCES:
patent: 5121029 (1992-06-01), Hosokawa et al.
patent: 5216331 (1993-06-01), Hosokawa et al.
patent: 5891554 (1999-04-01), Hosokawa et al.

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