Highly efficient white organic electroluminescent devices based on tandem architecture

Chan Ching Chang*, Jenn-Fang Chen, Shiao Wen Hwang, Chin H. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

185 Scopus citations


Two types of tandem organic light-emitting diodes (OLEDs) with white-light emission have been developed by using Mg:Al q3 W O3 as the interconnecting layer. While the Commission Internationale d'Eclairage (CIE) coordinates of the tandem device with individual blue- and yellow-emitting OLEDs was sensitive to the viewing angle and the operating time, the tandem device connecting two white-emitting OLEDs was considerably less. At an optimal W O3 thickness of 5 nm, the tandem two-unit device produced three higher luminance efficiency than that expected of a single-unit device. A maximum efficiency of 22 cdA was achieved by the tandem device comprised of two white-fluorescent OLEDs, and the projected half-life under the initial luminance of 100 cd m2 was over 80 000 h.

Original languageEnglish
Article number253501
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number25
StatePublished - 2005


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