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US 2018/0019442 A1Published application
Waveguides comprising light extraction nanostructures and display devices comrpising the same
AssigneeCorning Incorporated
InventorsArchit Lal, Pamela Arlene Maurey, Daniel Aloysius Nolan, Wageesha Senaratne
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Abstract
Disclosed herein are OLED devices comprising waveguides including at least one waveguide layer comprising at least one inorganic nanoparticle and at least one binder and having an RMS surface roughness of less than about 20 nm. Lighting and display devices comprising such OLED devices are further disclosed herein as well as methods for making the waveguides.
Claims20
An organic light emitting diode device comprising:
- a cathode;
- an anode;
- an organic light emitting layer disposed between the cathode and anode;
- and
- a substrate comprising at least one waveguide layer comprising:
- at least one inorganic nanoparticle having a refractive index nm ranging from about 1.6 to about 2.6,
- at least one binder having a refractive index nb ranging from about 1.3 to about 1.55, and
- an RMS surface roughness of less than about 20 nm,
- wherein the at least one inorganic nanoparticle comprises a combination of a first metal oxide nanoparticle and a second metal oxide nanoparticle, the first and second metal oxide nanoparticles having different particle size distributions.
6 more elements
An organic light emitting diode device comprising:
- a cathode;
- an anode;
- an organic light emitting layer disposed between the cathode and anode;
- and
- a substrate comprising at least one waveguide layer comprising:
- at least one inorganic nanoparticle having a refractive index nm ranging from about 1.6 to about 2.6,
- at least one binder having a refractive index nb ranging from about 1.3 to about 1.55,
- a high density region having an effective refractive index nw1 greater than or equal to about 1.7, and
- a low density region having an effective refractive index nw2 ranging from about 1.4 to less than about 1.7.
6 more elements
A coating composition for a waveguide, comprising:
- at least one metal oxide nanoparticle having a refractive index nm ranging from about 1.6 to about 2.6,
- at least one binder chosen from silicate and organosilicon materials having a refractive index nb ranging from about 1.3 to about 1.55, and
- at least one solvent,
- wherein the coating composition, upon application to a substrate surface, has an RMS surface roughness of less than about 20 nm.
1 more element
A method for making a waveguide, comprising:
- combining a first dispersion and a second dispersion to form a combined dispersion, wherein:
- the first dispersion comprises at least one first solvent and at least one inorganic nanoparticle having a refractive index nm ranging from about 1.6 to about 2.6,
- the second dispersion comprises at least one second solvent and at least one binder having a refractive index nb ranging from about 1.3 to about 1.55;
- and
- coating the combined dispersion on at least one surface of a substrate to form a waveguide layer having an RMS surface roughness of less than about 20 nm.
2 more elements
Dependencies are inferred from the claim text.