The suppression of viewing angle dependence of top emission organic light emitting diodes having strong microcavity characteristics by applying concave patterned anode. Issue 2 (26th March 2018)

• Record Type: Journal Article
• Authors: Kim, Nam Su; Jung, Seon Hyeak; Suh, Min Chul
• Is Part Of: Journal of the Society for Information Display. Volume 26:Issue 2(2018)
• Page Start: 79
• Page End: 84
• Publication Date: 2018-03-26
• Subjects: concave electrode -- TEOLED -- nano‐porous film -- outcoupling enhancement -- viewing angle dependence; Information display systems -- Periodicals; 621.38154205
• DOI: 10.1002/jsid.639
• Languages: English
• ISSNs: 1071-0922

Abstract

Abstract: In order to obtain the stable viewing angle characteristics of top emission organic light emitting diodes (TEOLEDs) having strong microcavity characteristics, we fabricated nano‐porous film on the glass substrate before depositing highly reflective anode. And then, we could obtain the concave patterned anode by depositing anode on the nano‐porous film and fabricated TEOLED composed of concave patterned layers. From this approach, we could successfully obtain not only the stable color shift and luminance distribution with viewing angle but also high efficiency caused by uneven morphology. In addition, we found that the driving voltage of TEOLED could be reduced due to increased surface area effect of the concave patterned anode, so that the power efficiency was enhanced by about 15% in comparison with reference device. Abstract : In order to suppress the viewing angle dependence of top emission organic light emitting diodes (TEOLEDs) having strong microcavity characteristics, we fabricated nano‐porous film on the glass substrate before depositing highly reflective anode. As a result, we successfully obtained not only stable viewing angle characteristics but also high efficiency in comparison with reference device.