Abstract
Outcoupling efficiency (OCE) of organic light emitting diodes (OLEDs) with four different microlens arrays was studied by two-dimensional finite-difference time-domain simulation to find out correlation between the size of microlenses and OCE. The OCE decreased as the size of microlenses was reduced irrespective of the shape of microlenses. Especially, the OCE became similar to that of basic OLED without any microlenses when the size of microlenses was lower than the wavelength of visible light. This result was attributed to the backscattering caused by microlenses, which was enhanced significantly at lower sizes and confirmed by additional Mie-scattering simulation. Insertion of high-index layer with embedded micropores between the glass substrate and the transparent electrode was effective in extracting the light trapped in organic layers. The combination of optimized microlenses and high-index layer resulted in the increase of OCE by 196%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
