An enhanced light extraction OLED device including a transparent substrate; light scattering layer disposed over a first surface of the transparent substrate; a transparent first electrode layer disposed over the light scattering layer; an organic EL element disposed over the transparent first electrode...http://www.google.de/patents/US20040061136?utm_source=gb-gplus-sharePatent US20040061136 - Organic light-emitting device having enhanced light extraction efficiency
