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US 2015/0144928 A1Published application
BURIED GRID FOR OUTCOUPLING WAVEGUIDED LIGHT IN OLEDs
AssigneeThe Regents of the University of Michigan
InventorsStephen R. FORREST, Michael SLOOTSKY, Yue QU
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Abstract
Light-emitting devices are provided that include a mixed-index layer having a buried grid disposed below a bottom electrode of the device. The grid provides improved outcoupling into glass and air modes relative to techniques that omit such a grid and/or that use a conventional low-index grid embedded in the emissive layers of the device.
Claims23
A device comprising:
- a substrate;
- a mixed-index layer disposed above the substrate, the mixed-index layer comprising:
- a first material having a first refractive index;
- and
- a second material having a second refractive index different from the first refractive index, the first and second materials being disposed in a periodic pattern;
- a first electrode disposed above the mixed-index layer;
- an organic emissive layer disposed above the first electrode;
- and
- a second electrode disposed above the organic emissive layer.
6 more elements
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A method comprising:
- fabricating a mixed-index layer in a pattern over a substrate, the mixed-index layer comprising a high-index material and a low-index material;
- depositing a first electrode over the patterned mixed-index layer;
- depositing an organic emissive layer over the first electrode;
- and
- depositing a second electrode over the organic emissive layer.
2 more elements
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24-28. (canceled)
Dependencies are inferred from the claim text.