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Title: Stacked white OLED having separate red, green and blue sub-elements

The present invention relates to efficient organic light emitting devices (OLEDs). The devices employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. Thus, the devices may be white-emitting OLEDs, or WOLEDs. Each sub-element comprises at least one organic layer which is an emissive layer--i.e., the layer is capable of emitting light when a voltage is applied across the stacked device. The sub-elements are vertically stacked and are separated by charge generating layers. The charge-generating layers are layers that inject charge carriers into the adjacent layer(s) but do not have a direct external connection.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1136633
Assignee:
The Regents of the University of Michigan (Ann Arbor, MI) CHO
Patent Number(s):
8,766,291
Application Number:
13/124,698
Contract Number:
FG02-07ER84809
Research Org:
The University of Michigan, Ann Arbor, MI (USA)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Works referenced in this record:

Very high-efficiency green organic light-emitting devices based on electrophosphorescence
journal, July 1999
  • Baldo, M. A.; Lamansky, S.; Burrows, P. E.
  • Applied Physics Letters, Vol. 75, Issue 1, p. 4-6
  • DOI: 10.1063/1.124258