Efficiency Improvement of Organic Light-Emitting Device by Pixel Partitioning and Hollow-Arranged Microlens Array Films
Date Issued
2009
Date
2009
Author(s)
Hsiao, Yu-Ting
Abstract
We demonstrate a simulation model of OLED by utilizing ray-tracing with the optical software LightTools. Applying the microlens array film (MAF) is the way to reduce the total internal reflection (TIR) between air and glass interfaces. Furthermore, in order to improve optical characteristics of devices and also have the potential for longer lifetime, partitioning pixel incorporate hollow-arranged MAF with auxiliary electrodes was proposed. We modulate some parameters such as area and period of sub-pixel, and aspect ratio of MAF which to find out the effects on total power enhancement and 0? luminance enhancement compared to bare device. n our simulation results, partitioned devices with hollow-arranged MAF can have vastly improvement to 58.6 % under the same total active area and optical power generated by the organic emitter. However, applying auxiliary electrodes could shield rays from the organic emitter, partitioning pixel assisted with hollow-arranged MAF seems to be a good choice and 0? luminance enhancement will be promoted to 48 %.
Subjects
Pixel Partitioning
Hollow-Arranged Microlens Array
Organic Light-Emitting
Efficiency
Type
thesis
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