Light extraction from electroluminescent devices using micro-rod array embedded within glass substrate

Yi-Jun Wang, Shi-Hong Ouyang, Jian-Gang Lu, Han-Ping Shieh

Research output: Contribution to journalArticle

2 Scopus citations

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. (C) 2015 Optical Society of America
Original languageAmerican English
Pages (from-to) A819-A828
Number of pages10
JournalOptics Express
Volume23
Issue number15
DOIs
StatePublished - 27 Jul 2015

Keywords

  • EMITTING-DIODES; PHOTONIC CRYSTALS; EFFICIENCY; EMISSION; LASER

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