Light extraction improvement of flexible top-emitting organic light-emitting devices by using nanoimprinted periodically corrugated polycarbonate substrate

Yu Hsuan Ho, Ming Chih Tsai, Hsun Liang, Yen Chun Fu, Wei Cheng Tian, Fang-Chung Chen, Pei Kuen Wei*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Highly efficient waveguide mode extraction elements of nanograting structures onto the flexible substrate of top-emitting organic light-emitting devices (TOLEDs) were realized with the assistance of thermal nanoimprint process. The introduction of the periodic corrugation has allowed a much enhanced light coupling through a thick Ag cathode by the grating-induced cross coupling between the SPPs associated with the top cathode and the high-index guided modes within the device. An enhanced EL efficiency and strong color shift have been observed. To nanoimprint the periodical corrugation in the flexible substrate of the TOLEDs leads to 54.3% enhancement in luminous efficiency compared to reference devices.

Original languageEnglish
Pages (from-to)1421-1423
Number of pages3
JournalDigest of Technical Papers - SID International Symposium
Volume44
Issue number1
DOIs
StatePublished - 1 Jan 2013

Keywords

  • Top-OLED
  • extraction efficiency enhancement
  • flexible electronics
  • nanoimprint technique

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