2.3: Monte Carlo Simulations and Opto-Electronic Properties of Polymer Light-Emitting Devices on Flexible Plastic Substrates

A Monte Carlo method for modeling the light transport phenomena in organic polymer light-emitting devices (PLEDs) has been reported by our group. [1] The unique advantage of this method is its ability to model bulk absorption events, thin film coatings, and rough surfaces while keeping track of the photon polarization state in a realistic geometry of the devices. We have applied this method to analyze the wavelength output distribution and out-coupling efficiency of the PLEDs. In this paper we further expand this method to model the Fresnel interactions at rough surfaces. We have found that the interfacial roughness between the polymer light emissive layer and hole transport layer increases the probability of the photon out-coupling and waveguiding parts of the internally generated light.