Effect of dielectric nanoparticles on light extraction efficiency of OLED

We report enhancement in light extraction efficiency of organic light emitting diode (OLED) using dielectric nano-particles between glass substrate and anode. The nano-particles acted as a scattering medium for the light trapped in waveguiding modes of the device. The simulation and analysis of design has been carried out by finite difference time domain (FDTD) method. Effects of various parameters like diameter, interparticle separation and refractive index of nanoparticles were studied. The maximum enhancement in light extraction efficiency of 1.7 times has been achieved.