公开(公告)号：US09698382B2

公开(公告)日：2017-07-04

申请号：US14908337

申请日：2014-07-23

Applicant: JOLED INC.

Inventor： Keiko Kurata ,  Muneharu Sato ,  Tetsuro Kondoh ,  Shinichiro Ishino

IPC: H01L27/15 ,  H01L31/12 ,  H01L33/00 ,  H01L51/52 ,  H01L27/32

CPC classification number: H01L51/5271 ,  H01L27/3211 ,  H01L51/5234 ,  H01L51/5265 ,  H01L51/5275

Abstract: Each of blue light emitting elements includes: a photoanode; a translucent cathode; an organic light emitting layer between the photoanode and the translucent cathode; a first functional layer between the organic light emitting layer and the photoanode; and a second functional layer between the organic light emitting layer and the translucent cathode, and has a resonator structure. The first functional layer has an optical film thickness of 48-62 nm. The translucent cathode is a stack of a first translucent conductive layer, a metal layer, and a second translucent conductive layer stacked in this order from the second functional layer side. The first translucent conductive layer has a refractivity of 2.0-2.4, and a film thickness of 85-97 nm. The metal layer has a refractivity different by 0 to 2.0 from that of the first translucent conductive layer, and has a film thickness of 2-22 nm.