Efficiency Improvement of Organic Light-Emitting Device by Pixel Partitioning and Hollow-Arranged Microlens Array Films

• Main Authors: Yu-Ting Hsiao, 蕭宇廷
• Other Authors: Hoang-Yan Lin
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/39737604690797095222

碩士 === 國立臺灣大學 === 光電工程學研究所 === 97 === 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. In 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 %.