Patterning of OLED Glass Substrate for Improving Light Outcoupling Efficiency

Savanna LLOYD  Tatsuya TANIGAWA  Heisuke SAKAI  Hideyuki MURATA  

IEICE TRANSACTIONS on Electronics   Vol.E102-C   No.2   pp.180-183
Publication Date: 2019/02/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.2018OMS0010
Type of Manuscript: BRIEF PAPER
organic light emitting diodes,  light outcoupling,  substrate waveguides,  laser patterning,  

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In this work, we have successfully patterned OLED glass substrates with a novel Yb-doped femtosecond laser. Such patterns can simultaneously increase the outcoupling efficiency up to 24.4%, as a result of reducing substrate waveguided light by scattering at the substrate/air interface and reduce the viewing angle dependence of the electroluminescent spectra.