Patent ID: 8921839
Filing Date: 2014-12-30
Classification: H01L,Y02E,Y02P

Abstract:
1. An organic light, emitting device (OLED) with a spherical back mirror, the LED comprising: a transparent first electrode layer; a transparent second electrode layer overlying the first electrode layer; an electron transport layer interposed between the first and second electrode layers; a light-emitting layer adjacent to the electron transport layer; a hole transport layer adjacent to the light-emitting layer; a hole injection layer adjacent to the hole transport layer; and, a spherical back mirror concave top surface underlying the first electrode layer; a transparent isolation layer interposed between the first electrode layer and the spherical back mirror concave surface; wherein the first electrode layer has a bottom surface; wherein the spherical back mirror has a spherical curve defined by a radius of curvature (R); wherein a first interface exists between the light-emission layer and the hole transport layer; wherein a distance between the first interface and the first electrode layer bottom surface is h2; wherein the isolation layer has a thickness (h1) between a center the spherical back mirror and the first electrode layer bottom surface; and, wherein (h1+h2)/R is in a range of 0.2 to 0.4.