Oled light extraction films having nanoparticles and periodic structures

A light extraction film having nanoparticles and periodic structures, comprising:

• a substantially transparent substrate;
• periodic structures on the substantially transparent substrate;
• a planarizing backfill layer applied over the periodic structures, forming a substantially planar surface of the backfill layer;
• and
• light scattering nanoparticles distributed throughout the backfill layer,
• wherein an index of refraction of the backfill layer is higher than an index of refraction of the periodic structures.

A method for providing a light extraction film on an organic light emitting diode (OLED) device having a surface that outputs light, comprising:

• providing a light extraction film, comprising:
• a substantially transparent substrate;
• periodic structures on the substantially transparent substrate;
• light scattering nanoparticles applied in a surface layer manner over the periodic structures;
• and
• a planarizing backfill layer applied over the periodic structures and the nanoparticles, forming a substantially planar surface of the backfill layer,
• wherein an index of refraction of the backfill layer is higher than an index of refraction of the periodic structures;
• applying an adhesive to the substantially planar surface of the backfill layer;
• and
• laminating the light extraction film to the OLED device such that the substantially planar surface of the backfill layer is located against the light output surface of the OLED device,
• wherein the adhesive provides for optical coupling between the light output surface of the OLED device and the backfill layer.

A method for providing a light extraction film on an organic light emitting diode (OLED) device having a surface that outputs light, comprising:

• providing a light extraction film, comprising:
• a substantially transparent substrate;
• periodic structures on the substantially transparent substrate;
• light scattering nanoparticles applied in a surface layer manner over the periodic structures;
• and
• a planarizing backfill layer applied over the periodic structures and the nanoparticles, forming a substantially planar surface of the backfill layer,
• wherein an index of refraction of the backfill layer is higher than an index of refraction of the periodic structures;
• applying an adhesive to the light output surface of the OLED device;
• and
• laminating the light extraction film to the OLED device such that the substantially planar surface of the backfill layer is located against the light output surface of the OLED device,
• wherein the adhesive provides for optical coupling between the light output surface of the OLED device and the backfill layer.

A method for providing a light extraction film on an organic light emitting diode (OLED) device having a surface that outputs light, comprising:

• providing a light extraction film, comprising:
• a substantially transparent substrate;
• periodic structures on the substantially transparent substrate;
• a planarizing backfill layer applied over the periodic structures, forming a substantially planar surface of the backfill layer;
• and
• light scattering nanoparticles distributed throughout the backfill layer,
• wherein an index of refraction of the backfill layer is higher than an index of refraction of the periodic structures;
• applying an adhesive to the substantially planar surface of the backfill layer;
• and
• laminating the light extraction film to the OLED device such that the substantially planar surface of the backfill layer is located against the light output surface of the OLED device,
• wherein the adhesive provides for optical coupling between the light output surface of the OLED device and the backfill layer.

A method for providing a light extraction film on an organic light emitting diode (OLED) device having a surface that outputs light, comprising:

• providing a light extraction film, comprising:
• a substantially transparent substrate;
• periodic structures on the substantially transparent substrate;
• a planarizing backfill layer applied over the periodic structures, forming a substantially planar surface of the backfill layer;
• and
• light scattering nanoparticles distributed throughout the backfill layer,
• wherein an index of refraction of the backfill layer is higher than an index of refraction of the periodic structures;
• applying an adhesive to the light output surface of the OLED device;
• and
• laminating the light extraction film to the OLED device such that the substantially planar surface of the backfill layer is located against the light output surface of the OLED device,
• wherein the adhesive provides for optical coupling between the light output surface of the OLED device and the backfill layer.