title: Light extraction from electroluminescent devices using micro-rod array embedded within glass substrate.
abstract: The total internal reflection (TIR) effect in conventional electroluminescent devices causes a large amount of light energy trapped in the devices and result in heat energy that adversely affects the performance of the device. In order to enhance the light out-coupling efficiency without sacrificing the electrical properties, a micro-rod array (MRA) structure fabricated by a femtosecond laser was demonstrated. Green, blue, and red organic light-emitting diodes were employed to verify the effect of the proposed method, which increases out-coupling efficiencies by a factor of 1.9, 1.7, and 1.82, respectively, compared with conventional devices. This highly effective method is compatible with current device fabrication processes and is applicable to full-color electroluminescent devices.
authors.forename: Yi-Jun
authors.initials: YJ
authors.lastname: Wang
authors.forename: Shi-Hong
authors.initials: SH
authors.lastname: Ouyang
authors.forename: Jian-Gang
authors.initials: JG
authors.lastname: Lu
authors.forename: Han-Ping D
authors.initials: HP
authors.lastname: Shieh