LIGHT EXTRACTION FILM WITH NANOPARTICLE COATINGS
申请公布号:EP2371018(A2)
申请号:EP20090836641
申请日期:2009.12.01
申请公布日期:2011.10.05
发明人:ZHANG, JUN-YING;BARAN, JIMMIE R., JR.;SMITH, TERRY L.;SCHULTZ, WILLIAM, J.;KOLB, WILLIAM BLAKE;PATNAUDE, CHERYL A.;LAMANSKY, SERGEY A.;NELSON, BRIAN K.;JING, NAIYONG;KOLB, BRANT U.
分类号:H01L51/52;B82Y20/00;B82Y30/00;G02B5/02
主分类号:H01L51/52
摘要:<p>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.</p>
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