Monte Carlo modeling of organic polymer light-emitting devices on flexible plastic substrates

Shu-jen Lee; Aldo Badano; Jerzy Kanicki

doi:10.1117/12.451883

3 March 2003 Monte Carlo modeling of organic polymer light-emitting devices on flexible plastic substrates

Shu-jen Lee, Aldo Badano, Jerzy Kanicki

Proceedings Volume 4800, Organic Light-Emitting Materials and Devices VI; (2003) https://doi.org/10.1117/12.451883
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

A Monte Carlo method for modeling the light transport phenomena in organic polymer light-emitting devices (PLEDs) is reported. In this simulation we assumed a point light source having photon emission spectrum represented by the photoluminescence (PL) spectrum of the organic polymers. This method describes the fate of photons through multiple scattering events determined by the wavelength-dependent material optical properties in a 3-D Cartesian geometry, thus considering the effects of refraction at different interfaces, back-reflection from the cathode, interference effect in the ITO thin film, and absorption within the polymer layers. We apply this method to analyze the wavelength output distribution and extraction efficiency. We found that the simulated light emission spectra of the green and red light-emitting devices are very similar to the measured PL spectra, suggesting that the light transport phenomena do not change the energy distribution significantly. We also established that the calculated extraction efficiency for the red (η_ext = 19.5%) and green (η_ext = 19.9%) PLEDs are approximately the same. We further investigated the light emission angular distribution of the PLEDs, and found that the simulated angular distribution shows better agreement with the experimental data than previously used models that rely on standard refraction theory at one interface.

Citation Download Citation

Shu-jen Lee, Aldo Badano, and Jerzy Kanicki "Monte Carlo modeling of organic polymer light-emitting devices on flexible plastic substrates", Proc. SPIE 4800, Organic Light-Emitting Materials and Devices VI, (3 March 2003); https://doi.org/10.1117/12.451883

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