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Title: OLED with improved light outcoupling

Patent ·
OSTI ID:1333726
;

An OLED may include regions of a material having a refractive index less than that of the substrate, or of the organic region, allowing for emitted light in a waveguide mode to be extracted into air. These regions can be placed adjacent to the emissive regions of an OLED in a direction parallel to the electrodes. The substrate may also be given a nonstandard shape to further improve the conversion of waveguide mode and/or glass mode light to air mode. The outcoupling efficiency of such a device may be up to two to three times the efficiency of a standard OLED. Methods for fabricating such a transparent or top-emitting OLED is also provided.

Research Organization:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-04ER84113; FC26-04NT42272
Assignee:
The Regents of the University of Michigan (Ann Arbor, MI)
Patent Number(s):
9,508,957
Application Number:
12/531,595
OSTI ID:
1333726
Resource Relation:
Patent File Date: 2008 Mar 31
Country of Publication:
United States
Language:
English

References (10)

Organic electroluminescence device patent April 1999
Light-emitting device patent March 2004
Light-emitting device patent April 2004
Increased emission efficiency in organic light-emitting devices on high-index substrates patent May 2006
Apparatus and method for manufacturing electro-optical devices patent May 2010
Electroluminescence device, planar light source and display using the same patent May 2010
Electroluminescence device, planar light source and display using the same patent-application June 2005
Organic light emitting device and method of manufacturing the same patent-application April 2006
Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection journal March 2007
Doubling Coupling-Out Efficiency in Organic Light-Emitting Devices Using a Thin Silica Aerogel Layer journal August 2001

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