Nanostructured super-period gratings and photonic crystals for enhancing light extraction efficiency in OLEDs
نویسنده
چکیده
The focus of this study is to improve the light extraction efficiency and directionality of the OLED using a photonic crystal. First, the single period dielectric structure was optimized for red, green and blue wavelengths. The results showed an increase in directionality to an angle of approximately ± 15 degrees. This is promising since the angle needed for comfortable viewing is considered to be ± 20 degrees. Then the superperiod structure was designed and simulated for red and blue wavelengths. There was a further increase in directionality to ± 20 degrees. The transmission spectrum for both wavelengths was also affected at multiple regions, as proposed in the superperiod design. Further work entails more superperiod simulations with changes to parameter values, including consideration of four possible dipole positions.
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تاریخ انتشار 2008