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Proceedings Paper

Multi-objective optimization of microcavity OLEDs with DBR mirror
Author(s): Albert W. Lu; J. Chan; Alan Man Ching Ng; A. B. Djurišić; A. D. Rakić
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Paper Abstract

In this work, the emission efficiency and spectral shift with respect to viewing angle were optimized by optimizing the design of the multi-layer top mirror of a microcavity OLED device. We first established criteria for the emission side mirror in order to optimize light intensity and spectral shift with viewing angle. Then we designed mirror using metallic and dielectric layers based on the target defined. The electroluminescence emission spectra of a microcavity OLED 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 was then calculated. Silver was used as the anode and back reflection mirror for the microcavity OLED. The simulation was performed for both the conventional LiF/Al cathode/top mirror and the optimized 5-layered top mirror. Our results indicate that by following the design procedure outlined, we simultaneously optimize the device for better light intensity and spectral shift with viewing angle.

Paper Details

Date Published: 16 February 2007
PDF: 9 pages
Proc. SPIE 6470, Organic Photonic Materials and Devices IX, 647014 (16 February 2007); doi: 10.1117/12.701424
Show Author Affiliations
Albert W. Lu, The Univ. of Queensland (Australia)
J. Chan, The Univ. of Queensland (Australia)
Alan Man Ching Ng, Univ. of Hong Kong (Hong Kong China)
A. B. Djurišić, Univ. of Hong Kong (Hong Kong China)
A. D. Rakić, The Univ. of Queensland (Australia)

Published in SPIE Proceedings Vol. 6470:
Organic Photonic Materials and Devices IX
James G. Grote; Francois Kajzar; Nakjoong Kim, Editor(s)

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