Enhanced and balanced efficiency of white bidirectional organic light-emitting diodes

Jonghee Lee, Hyunsu Cho, Tae-Wook Koh, Changhun Yun, Simone Hofmann, Jae-Hyun Lee, Yong Hyun Kim, Bjoern Luessem, Jeong-Ik Lee, Karl Leo, Malte C. Gather, Seunghyup Yoo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We report on the characteristics of enhanced and balanced white-light emission from bi-directional organic light-emitting diodes (BiOLEDs) enabled by the introduction of micro-cavity effects. The insertion of an additional metal layer between the indium tin oxide anode and the hole transporting layer results in similar light output of our BiOLEDs in both top and bottom direction and in reduced distortion of the electroluminescence spectrum. Furthermore, we find that by utilizing MC effects, the overall current efficiency can be improved by 26.2% compared to that of a conventional device. (C) 2013 Optical Society of America

Original languageEnglish
Pages (from-to)28040-28047
Number of pages8
JournalOptics Express
Issue number23
Publication statusPublished - 18 Nov 2013




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