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Yan-Gang Bi, Jing Feng, Yun-Fei Li, Xu-Lin Zhang, Yue-Feng Liu, Yu Jin and Hong-Bo Sun Broadband Light Extraction from White Organic Light-Emitting Devices by Employing Corrugated Metallic Electrodes with Dual Periodicity Advanced Materials 25

Article first published online: 24 SEP 2013 | DOI: 10.1002/adma.201302367

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A dual-periodic corrugation consisting of two sets of gratings with different periods to realize a broadband light extraction in white organic light-emitting diodes (WOLEDs) is shown. A 37 % enhancement in current efficiency and 48 % enhancement in the external quantum efficiency compared to those of the conventional planar devices have been obtained. Besides the much improved efficiency, the dual-periodic corrugated WOLEDs exhibit satisfying viewing characteristics.

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