LAYERED STRUCTURE FOR OLED DEVICE METHOD FOR MANUFACTURING THE SAME AND OLED DEVICE HAVING THE SAME

摘要

A layered structure for an organic light emitting diode (OLED) device the layered structure including a light transmissive substrate and an internal extraction layer formed on one side of the light transmissive substrate in which the internal extraction layer includes (1) a scattering area containing scattering elements composed of solid particles and pores the solid particles having a density that decreases as it goes away from the interface with the light transmissive substrate and the pores having a density that increases as it goes away from the interface with the light transmissive substrate and (2) a free area where no scattering elements are present formed from the surface of the internal extraction layer which is opposite to the interface to a predetermined depth.