Patterned organic light emitting diode (oled) with enhanced light extraction
AssigneeCorning Incorporated
InventorsDana Craig Bookbinder, Michal Mlejnek, Dean Michael Thelen
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Abstract
An organic light emitting diode (OLED) incorporating an enhanced light extraction apparatus in the transparent conductive oxide layer is disclosed. The apparatus for light extraction may comprise a transparent substrate, a transparent electrode comprising one or more discontinuities, and an organic light emitting material stack. The transparent electrode may be disposed on the transparent substrate and comprise a series of features or discontinuities that enhance light extraction improve energy efficiency in the OLED device. The discontinuities may be discrete or continuous and may interrupt the conductivity of the transparent conductive oxide layer.
Claims21
An article comprising:
- an approximately planar substrate;
- at least one approximately planar transparent electrode layer having a first surface and a second surface;
- an optional approximately planar internal light extraction layer having a first surface and a second surface, the optional internal light extraction layer located between the planar substrate and the transparent electrode such that the first surface of the planar ILEL contacts the second surface of the transparent electrode;
- the transparent electrode layer comprising an interrupted transparent conductive oxide structure having an index of refraction, ηtco, wherein the transparent conductive oxide structure has at least one discontinuity that contacts at least the first surface of the transparent conductive oxide layer;
- the discontinuity comprising a material having an index of refraction, ηv, wherein |ηv−ηtco|≥0.05, such that the discontinuity acts as a scattering site to reduce a waveguiding effect in the transparent electrode layer, and the discontinuity has a conductivity of less than 1×10−3 S/m at 20° C.
(canceled)
Dependencies are inferred from the claim text.