Cavity design and optimization for organic microcavity OLEDs

J. Chan; Albert W. Lu; Chi Hang Cheung; Alan Man Ching Ng; A. B. Djurišić; Yew Tong Yeow; A. D. Rakić

doi:10.1117/12.638368

18 January 2006 Cavity design and optimization for organic microcavity OLEDs

J. Chan, Albert W. Lu, Chi Hang Cheung, Alan Man Ching Ng, A. B. Djurišić, Yew Tong Yeow, A. D. Rakić

Proceedings Volume 6038, Photonics: Design, Technology, and Packaging II; 603824 (2006) https://doi.org/10.1117/12.638368
Event: Microelectronics, MEMS, and Nanotechnology, 2005, Brisbane, Australia

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.

Citation Download Citation

J. Chan, Albert W. Lu, Chi Hang Cheung, Alan Man Ching Ng, A. B. Djurišić, Yew Tong Yeow, and A. D. Rakić "Cavity design and optimization for organic microcavity OLEDs", Proc. SPIE 6038, Photonics: Design, Technology, and Packaging II, 603824 (18 January 2006); https://doi.org/10.1117/12.638368

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