Researchers from Dupont have developed a new OLED device architecture that emits light with substantial polarization. In this architecture, unlike previous polarized OLED emission attempts, there is less reduction in efficiency (caused by quenching of excitons). The new architecture is based on molecules that form layers with substantial polarization. Using simulation methods, the researchers predicted the degree of polarization. By employing such materials in both the emissive layer and the adjacent electron-blocking layer, it was found that the device\u2019s EQE is improved when the difference in polarization between the two layers is reduced.\u00a0\u00a0The researcher have also found that when mixing two materials, the polarization of the mixed film can be linearly interpolated based on the mixing ratio and polarization of each individual component.Emitting polarized light is interesting for OLED displays as it could lead to higher total system efficiency – as the light must be polarized (or polarizer-free architectures must be deployed).In 2020, we reported on a research at the Imperial College London that devised a method to create strong chiral light emitting polymers OLEDs. These OLED devices emit efficient polarized light.<\/p>\n
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