Organic Polymer Light-Emitting Display for Digital Mammography

摘要

We have developed simulation tools for the optimization of the organic light-emitting device (OLED) high-resolution monochrome structures for medical imaging applications. We studied the effect of thin-film coatings and optical absorption in the organic materials on the emitted OLED spectra. We investigated advanced measurement methods for the characterization of display prototypes that will be fabricated in the University of Michigan laboratories. Using measured optical properties of the materials involved in a typical OLED structure, we computed the color shift from the photo-luminescent spectrum. In a submitted manuscript, we reported on the Monte Carlo method for modeling light transport phenomena in multi-layer organic polymer light-emitting devices on plastic substrates. We find that for all polymers considered, the emission is shifted toward the longer wavelengths, and that the shift is maximum for emissions with peaks around 530 nm. The photon extraction efficiency is higher (0.430) for polymers emitting in the longer wavelengths, while the absorbed fraction is higher (0.676) for spectra with maximum in the short wavelengths.