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P‐176: Distinquished Poster Paper: The Suppression of Viewing Angle Dependence of Top Emission Organic Light Emitting Diodes Having Strong Microcavity Characteristics by Applying Concave Patterned Anode
Author(s) -
Kim Nam Su,
Jung Seon Hyeak,
Kim Hyung Suk,
Suh Min Chul
Publication year - 2018
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.12424
Subject(s) - anode , materials science , luminance , optoelectronics , viewing angle , oled , diode , light emitting diode , substrate (aquarium) , electroluminescence , optics , voltage , nanotechnology , liquid crystal display , electrode , layer (electronics) , electrical engineering , chemistry , physics , oceanography , geology , engineering
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.