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Concave-hemisphere-patterned organic top-light emitting device

Patent ·
OSTI ID:1117843
; ;
A first device is provided. The first device includes an organic light emitting device, which further comprises a first electrode, a second electrode, and an organic emissive layer disposed between the first and second electrode. Preferably, the second electrode is more transparent than the first electrode. The organic emissive layer has a first portion shaped to form an indentation in the direction of the first electrode, and a second portion shaped to form a protrusion in the direction of the second electrode. The first device may include a plurality of organic light emitting devices. The indentation may have a shape that is formed from a partial sphere, a partial cylinder, a pyramid, or a pyramid with a mesa, among others. The protrusions may be formed between adjoining indentations or between an indentation and a surface parallel to the substrate.
Research Organization:
The Regents of the University of Michigan, Ann Arbor, MI, USA
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-08ER85082
Assignee:
The Regents of the University of Michigan (Ann Arbor, MI)
Patent Number(s):
8,633,497
Application Number:
12/731,249
OSTI ID:
1117843
Country of Publication:
United States
Language:
English

References (5)

Highly efficient phosphorescent emission from organic electroluminescent devices journal September 1998
Organic light-emitting diodes with photonic crystals on glass substrate fabricated by nanoimprint lithography journal March 2007
Role of the dielectric capping layer in enhancement of light outcoupling for semitransparent metal-cathode organic light-emitting devices journal July 2006
Large-scale patterning of indium tin oxide electrodes for guided mode extraction from organic light-emitting diodes journal November 2008
Very high-efficiency green organic light-emitting devices based on electrophosphorescence journal July 1999

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