Improvement of light out-coupling efficiency in organic light-emitting diodes with variable nanopatterns

Jeong Ho Kim, Joong Yeon Cho, Jaehoon Park, Bong Kuk Lee, Kyu Ha Baek, Heon Lee, Lee Mi Do

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We present a viable method to enhance the current efficiency of organic light-emitting diodes (OLEDs) by imprinting cylindrical nanopatterns (NPs) onto a glass substrate. Herein, OLEDs equipped with an optimum NP array having a diameter of 300 nm and a periodic distance of 500 nm show a 33.4% improvement in current efficiency compared with a device without NPs. The light extraction efficiency of OLEDs was enhanced using a nanopatterned glass substrate, without any electrical degradation owing to the formation of NPs on opposite sides of the organic layers. In addition, top-emitting OLEDs can be fabricated easily by patterning the encapsulation glass.

Original languageEnglish
Pages (from-to)27-29
Number of pages3
JournalElectronic Materials Letters
Volume10
Issue number1
DOIs
Publication statusPublished - 2014

Keywords

  • OLED
  • imprint
  • nanopattern
  • outcoupling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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