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Proceedings Paper

Cavity design and optimization for organic microcavity OLEDs
Author(s): J. Chan; Albert W. Lu; Chi Hang Cheung; Alan Man Ching Ng; A. B. Djurišić; Yew Tong Yeow; A. D. Rakić
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Paper Abstract

We report on detailed simulations of the emission from microcavity OLEDs consisting of widely used organic materials, N,N'-di(naphthalene-1-yl)-N,N'-diphenylbenzidine (NPB) as a hole transport layer and tris (8-hydroxyquinoline) (Alq3) as emitting and electron transporting layer. The thick silver film was considered as a top mirror, while silver or copper films on quartz substrate were considered as bottom mirrors. The electroluminescence emission spectra, electric field distribution inside the device, carrier density and recombination rate were calculated as a function of the position of the emission layer, i.e. interface between NPB and Alq3. In order to achieve optimum emission from a microcavity OLED, it is necessary to align the position of the recombination region with the antinode of the standing wave inside the cavity. Once the optimum structure has been determined, the microcavity OLED devices were fabricated and characterized. The experimental results have been compared to the simulations and the influence of the emission region width and position on the performance of microcavity OLEDs was discussed.

Paper Details

Date Published: 18 January 2006
PDF: 9 pages
Proc. SPIE 6038, Photonics: Design, Technology, and Packaging II, 603824 (18 January 2006); doi: 10.1117/12.638368
Show Author Affiliations
J. Chan, The Univ. of Queensland (Australia)
Albert W. Lu, The Univ. of Queensland (Australia)
Chi Hang Cheung, The Univ. of Hong Kong (Hong Kong China)
Alan Man Ching Ng, The Univ. of Hong Kong (Hong Kong China)
A. B. Djurišić, The Univ. of Hong Kong (Hong Kong China)
Yew Tong Yeow, The Univ. of Queensland (Australia)
A. D. Rakić, The Univ. of Queensland (Australia)

Published in SPIE Proceedings Vol. 6038:
Photonics: Design, Technology, and Packaging II
Derek Abbott; Yuri S. Kivshar; Halina H. Rubinsztein-Dunlop; Shanhui Fan, Editor(s)

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