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High-efficiency stacked white organic light-emitting diodes

Cited 183 time in Web of Science Cited 191 time in Scopus
Authors

Lee, Tae-Woo; Noh, Taeyong; Choi, Byoung-Ki; Kim, Myeong-Suk; Shin, Dong Woo; Kido, Junji

Issue Date
2008-01
Publisher
American Institute of Physics
Citation
Applied Physics Letters, Vol.92 No.4, p. 043301
Abstract
We report efficient tandem white organic light-emitting diodes (WOLEDs) by using bathocuproine:Cs(2)CO(3)/MoO(3) as an effective interconnecting layer. We utilized two primary colors of sky blue and orange fluorescent emitters to obtain efficient white electroluminescence. Although single WOLEDs using two adjacent emitting layers showed a maximum current efficiency of 7.96 cd/A with Commission Internationale d'Eclairage (CIE) coordinates of (0.28, 0.34), the tandem WOLED device made by stacking two single color OLEDs in series demonstrated doubled maximum current efficiency of 17.14 cd/A with CIE coordinates of (0.28, 0.41). The stacking of different single color OLEDs in series instead of double stacking of WOLEDs can be useful to achieve highly efficient WOLEDs because it can reduce the number of layers of the devices. (C) 2008 American Institute of Physics.
ISSN
0003-6951
URI
https://hdl.handle.net/10371/189892
DOI
https://doi.org/10.1063/1.2837419
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