Methods of making a full-color organic light-emitting display

Details Methods of making a full-color organic light-emitting display Methods of making a full-color organic light-emitting display

1998-12-21

2000-05-23

Bell, Janyce

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 68, 427 69, 427164, 427165, 427265, 427266, 427269, B05D 506

Patent

active

06066357&

ABSTRACT:
Methods of making a full-color organic light-emitting display are disclosed. The methods include ink-jet printing of fluorescent dopants selected to produce red, green, or blue light emission from designated subpixels of the display. The dopants are printed sequentially from ink-jet printing compositions which permit printing of dopant layers over a light-emitting layer containing a host material selected to provide host light emission in a blue spectral region. The dopants are diffused from the dopant layer into the light-emitting layer by exposing the light-emitting layer and the dopant layers to vapor of a fluid or fluid mixture. When an ink-jet printing composition is formulated with a printing fluid having fluid vapors which promote dopant diffusion, the steps of ink-jet printing and diffusing of dopants can be combined to form a selectively doped light-emitting layer.

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patent: 5294869 (1994-03-01), Tang et al.
patent: 5294870 (1994-03-01), Tang et al.

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