Emitter apodization dependent angular luminance enhancement of microlens-array film attached organic light-emitting devices
Journal
Optics Express
Journal Volume
18
Journal Issue
4
Pages
3238-3243
Date Issued
2010
Author(s)
Abstract
Taking organic emitter apodization calculated from electromagnetic theory as input, the angular luminance enhancement of a microlens-array-film (MAF) attached OLED (organic light-emitting device) can be further evaluated by ray-tracing approach. First, we assumed artificial emitters and revealed that not every OLED with MAF has luminance enhancement. Then, the OLEDs of different Alq(3) thickness were fabricated and their angular luminance measurement validated simulation results. Mode analyses for different layers were performed to estimate the enhancement potential of the MAF attached devices. In conclusion, the organic emitters with higher off-axis-angle luminous intensity cause lower out-coupling efficiency but gain higher enhancement after the MAF attached.
SDGs
Type
journal article