We demonstrate optimized viewing-angle characteristics from top-emitting organic light-emitting devices by integrating a periodic microstructure into the cavity. A holographic lithography technique combined with filling process of the groove by spin coating of a polymer film has been employed to enable its periodically and gradually changed cavity length and suppress the viewing-angle dependence of the peak emission wavelength and intensity. The theoretical and experimental results support that the proposed microstructured cavity can resolve the angular-dependence effect in a very simple and effective way, and a desired omnidirectional emission has been obtained.

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作者

Yue-Feng Liu,Jing Feng,Yan-Gang Bi,Jun-Feng Song,Yu Jin,Yu Bai,Qi-Dai Chen,and Hong-Bo Sun.

期刊

Optics Letters,37,2,124-126(2012)

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