Broadband light extraction from white organic light-emitting devices by employing corrugated metallic electrodes with dual periodicity
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Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
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Yan-Gang Bi1, Jing Feng, Yun-Fei Li
1State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, P.R. China.
Abstract:
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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