Laser speckle formed disordered micro-meander structures for light extraction enhancement of flexible organic light-emitting diodes

Yuan-Yuan Fan, Gui-Lin Bai, Yu-Fu Zhu, Qing-Dong Ou, Lei Zhou, An-Ran Bi, Xing-Guo Fu, Su Shen, Huai-Xin Wei

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4 Citations (Scopus)


A new approach for efficiently recovering the wasted light energy in conventional flexible organic light-emitting diodes (FOLEDs) is developed by implementing disordered micro-meander structures (DMMs) via laser speckle holography technology. Compared to conventional flat device architecture, the structured FOLEDs with DMMs result in substantial improvement of the device efficiency and superior angular color stability. The resulting current efficiency (CE) and external quantum efficiency (EQE) are 1.31 and 1.39 times that of a common flat structure, respectively. Moreover, the proposed DMMs micro-structure simultaneously offers the unique characteristics of angular color stability with a wide viewing angle, which is usually considered as the criteria of the high-quality lighting applications. We hope that the demonstrated method could provide an alternative way for the development of high efficiency flexible OLEDs.

Original languageEnglish
Pages (from-to)20420-20429
Number of pages10
JournalOptics Express
Issue number16
Publication statusPublished - 6 Aug 2018

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