LIGHT EXTRACTION FILM WITH NANOPARTICLE COATINGS

A multifunctional optical film for enhancing light extraction includes a flexible substrate, a structured layer having nanoparticles of different sizes, and a backfill layer. The structured layer effectively uses microreplicated diffractive or scattering nanostructures located near enough to the lig...

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Main Authors ZHANG JUN YING, SMITH TERRY L, SCHULTZ WILLIAM J, NELSON BRIAN K, BARAN JIMMIE R. JR, KOLB WILLIAM BLAKE, KOLB BRANT U, LAMANSKY SERGEY A, JING NAIYONG, PATNAUDE CHERYL A
Format Patent
LanguageEnglish
Korean
Published 21.09.2011
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SEMICONDUCTOR DEVICES
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Summary:A multifunctional optical film for enhancing light extraction includes a flexible substrate, a structured layer having nanoparticles of different sizes, and a backfill layer. The structured layer effectively uses microreplicated diffractive or scattering nanostructures located near enough to the light generation region to enable extraction of an evanescent wave from an organic light emitting diode (OLED) device. The backfill layer has a material having an index of refraction different from the index of refraction of the structured layer. The backfill layer also provides a planarizing layer over the structured layer in order to conform the light extraction film to a layer of an OLED display device. The film may have additional layers added to or incorporated within it to an emissive surface in order to effect additional functionalities beyond improvement of light extraction efficiency.
Bibliography:Application Number: KR20117016299